www.SteamPoweredRadio.Com UNITED. TRANSFORMER COMPANY DIVISION OF TRW INC. ~ THE UTC STORY-QUALITYand RELIABILITYat UTC UNITED TRANSFORMER COMPANY, Division of TRW Virtually all hermetic items in this catalog have been INC., with almost forty years of pioneering in the areas proved to meet one or more of the MIL Specs, or are of research , design and engineering assures you quality currently being tested . and reliability unexcelled in the industry. UTC has in A tremendous advantage exists in using the stand- continuous production the most complete line of stand- ardized UTC MIL components for military equipment. ard items ready for immediate delivery from the factory These units can be used in prototypes or full produc- or authorized industrial distributor. This, coupled with tion without special tests, costs , or delays. Minor de- UTC's broad capabilities in special (custom built) items, viations from standard units do not affect the original covers virtually every transformer and filter require- test validity. ment for both military and industrial use. UTC hermetic components are of rugged design with high safety factors in all characteristics . They are either ENGINEERING The knowledge and experience of the metal encased or molded and exceed MIL Specs in nation 's top engineering talent create UTC products. many respects, taking into consideration the most All designs are fully laboratory proved before being severe conditions which may be encountered in service. released for production . They are ideally suited for airborne, ground communi- MATERIALS and LIFE TESTING The UTC Material and cations , marine, and missile service. Chem ical Laboratories analyze and evaluate the mate- An increasing number of industrial equ ipment manu- rials employed in all products. Special processes facturers , becoming concerned with the reliability of are introduced as required by material characteristics. components in their equipment , are turning to hermeti- Finished units, as well as insulation systems, are con- cally sealed components. The necessity for reliability stantly undergoing life tests to provide reliability guides in industrial service is clear when the cost of an hour's for present and future designs and manufacturing proc- shutdown of a broadcast schedule or industrial control esses. The purpose of these tests is to extend the life system is visualized . of each design to the absolute maximum- usually far COMMERCIAL and INDUSTRIAL COMPONENTS UTC beyond customer requirements. non-hermetic lines of components are designed for a w ide range of applications, and have found acceptance QUALITY CONTROL The Quality Control Department in all types of commercial and industrial equipments. coordinates all statistics relating to materials and proc- They are conservatively designed to assure highest re- esses. All incoming materials are subjected to exhaus- liability. Breakdown test voltages are used far in excess tive testing , with individual lots of materials separately of maximum working voltages. All components are isolated in order to afford tight material control vacuum impregnated. Potted units are sealed with throughout production. Continuous surveillance is con- special insulating compounds for maximum environ- ducted to assure conformance of products to all re- mental protection. Our quality control on these com- quirements. If discrepancies are found or anticipated, ponents is as stringent as on our military lines, requiring corrective action is immediately instituted. Parts made 100% testing on prime parameters . within the UTC plant, such as drawn cans, stamped laminations, etc., are inspected and treated as though SPECIAL DESIGNS In addition to the needs met by they were provided by an outside vendor. the standard components in this catalog , there are many unique applications which require special units. Special- PRODUCT TESTING Each individual transformer or design facilities are available for production of samples filter is tested for its performance at least three times as well as large quantities. The close coordination be- during successive stages of manufacture. In addition to tween our design groups, sample shop, and factory this, a substantial sampling of each day's production is assures production quality equal to sample quality. put through extensive humidity, vibration, thermal shock, and overload testing to assure exact performance and THE END RESULT UTC's level of quality and reliabil- reliability. ity is unmatched in the industry-twenty times better than the industry average, based on available informa- MILITARY COMPONENTS The UTC Laboratories in- tion. clude complete "In House" DESC approved facilities For every phase of the art of iron core inductive for testing to MIL-T-27C, MIL-F-18327C, and MIL-T- devices, UTC is the first source for the highest reli- 210388. These facilities are employed for quality con- ability, the most varied types and the most sophisticated tro l of p roduction as well as for p roving new items. and advanced designs in the industry. www©. S1t9e7a0m UPNoITwEeDr eTdRRANaSdFioO.RCMoEmR COMPANY, DIVI SION OF TRW INC. Printed in U. www.SteamPoweredRadio.Com @ PRODUCT SERIES INDEX PRODUCT PRODUCT SERIES DESCRIPTION PAGE SERIES DESCRIPTION PAGE AUDIO TRANSFORMERS & INDUCTORS HIGH Q INDUCTORS General Information ............. . ............•... . ......... 2 General Information ...... . ......... . ..........•........ 60, 61 Product Selection Guide .............. . .........•....• . ..... 3 Product Selection Guide ....... . ....... . ...... . . . ...... .. .. 61 All MIL except VIC & DI Mil itary Types: Grade 4, Metal Encased High Q Inductors-Fixed BIT-250 Transistor & flat pack styles ...................... 4, 5 DI-T Ultraminiature transformers & inductors ............ . 10 FE Toroidal , molded .............•.............. . .... 64 Fl Toroidal , molded ........... . ..... . .•. .. .......... 64 DI-T200 Plug-i n ultraminiature transformers & inductors ....... 11 FO Toroidal , molded ..................•... . •......... 64 DO-T Ultramin iature transformers & inductors ............ 6, 7 HOA Toroidal, metal encased ......•........... . ......... 70 DO-T200 Plug-in , ultraminiature transformers & inductors ....... 8 HOB Toroidal , metal encased ........... • .... . ......•.... 70 FHA Low profile audio transformers ..................... 12 HOC Toroidal , metal encased ..... . .... . ............... . . 70 FHI Low profile inductors ................. . ........... 12 HOE Toroidal , metal encased .... . .... . ......•...... . .... 70 H Transformers & inductors. Full line . Hermetically MH Toroidal , molded .... . ......•..........• .. ... . .... 63 ML Lam inated , shielded .............. . .... . •. . ....... 62 sealed , metal encased ............. . ...... 12, 13, 14 MM Toroidal , molded .......... . . . .... . ............... 63 PIL Ultraminiature trans istor style un its ............ . ..... g MO Laminated , molded ... . ..... . . . ............... . ... 62 W Military Standards ............ . ........... . ....... 15 MOA Toroidal , metal encased ........................... 66 MOB Toroidal , metal encased ..•........ . .......... . .... 67 Military Types: Grade 5, Molded MOD Toroidal , metal encased ... .. ......... . ... . . . ...... 66 SML Plug-i n transformers .......... .. ... .. .. , ... , , ..... 16 MOE Toroidal , metal encased .........•..........• . ..... 67 SO-P Molded transformers ................... . .... . ..... 17 MOL Laminated , metal encased ........•.......... .. .... 65 MOM Laminated , metal encased .. . ..... . .. . .. . . . .... . . . . 65 SSO-P Molded transformers .................. • . . .. . ...... 16 MS Toroidal , molded ..................... . . .. ........ 63 Industrial Types: Cased, non-hermetic MW Toroidal , molded .... . ........... . ................ 63 TOA Same as MOA, but centertapped ...... . .....•...... 66 A Ultra compact wideband transformers & inductors .. 20 , 21 CAT High copper eff iciency for trans istor use ............. 26 High Q Inductors-Variable CG High qual i ty transformers ............... . .......... 26 HVC Wide range, + 200%, - 70% of nominal value .. . ..... 68 HA Excel lent qual i ty audio transformers ............. 24 , 25 HVV Vernier, narrow range ± 10% of nominal value ...... . 68 LAB Highest quali ty for laboratory c ircui t deve lopment .... 15 TVC Same as HVC, but centertapped .................... 68 LS Hi-fidelity, highest quality. Broadcast types ....... 22, 23 VIC + 85%, - 45% of nominal value .. . ...... . .. . ...... 69 DI Inductance decades ..... . .... . ... . •.....• . ... . .. . 69 0 Compact audio transformers & inductors . . .......... 18 P Octal socket plug-in types .. . .................. . .. 19 ELECTRIC WAVE FILTERS S Popular priced series ........... . ... .. • . ......... . 27 General Information ........ . . . ........• . ... . ......•.... . 72, 73 Industrial Types: Open Frame, non-hermetic Product Selection Guide ..... .. ........ . .•...... . ....... . .. 74 SO Flexible lead types ................ . .••........... 17 Band Pass SSO Flexible lead types ....•.. . .•.. . .... . .•..... . ..... 16 BMI Miniature metal cased . Center frequency range POWER TRANSFORMERS & INDUCTORS 30 Hz to 10 kHz . ............................... 80 BML Similar to BMI. Center frequency range 400 Hz to 1 kHz .. 80 General Information . . ....... . .. . ............. . •... . •..... . 30 BPH Ultra miniaturized metal cased, pin terminals. Center Product Selection Guide ....................... . . . ......... 31 frequency range 50 kHz to 100 kHz ........... . ... . 76 BPM Ultra miniaturized metal cased , pin terminals. Center Military Types frequency range 400 Hz to 20 kHz ..... . .. . ..... . . 76 BTI Similar to BMI. Center frequency range 60 Hz to 120 Hz . SO DO-T400 Ultraminiature power transformers .............. . ... 37 FBH Flat construction , high frequency ........... . ....... 75 H Hermetically sealed inductors, Grades 4 & 5 .. 12, 13, 14, 36 LBP Low Frequency ....... . ...... . .. . ........... . ..... 83 H Hermetically sealed transformers, Grades 4 & 5 .. 32 thru 40 MNF Ultraminiature telemetering metal cased, epoxy HIT Ultra-shielded power line isolation transformers ...... 40 terminal board . Band Width ± 7.5% . ..... . . . ...... 78 MAT For magnetic ampl ifier and other applications .... 48, 49 MWF Similar to MNF except Band Width ± 15% ......... . .. 78 MET For 400 Hz application .................... 32 , 33 & 37 PLP 400 Hz line .... .. ... . ... . ....... . .. . .............. 83 TGR Telegraph Tone Channel Receiving . ... . .. . .......... 79 N Military Standard transformers . . ........... . ....... 41 TGT Telegraph Tone Channel Transmitting . ... . ........... 79 NV Miniature inverter transformers ..........• . ........ 35 TMN Miniature Telemetering metal cased . Band Width SAC Precision Scott-T reference ............ . ........... 40 ± 7.5% ............. . .... . ..... . ... . ........... 78 Z Military Standard inductors .... . ................... 41 TMW Similar to TMN except Band Width ± 15% .... . ...... . 78 Industrial and Commercial Types Band Reject BPM Ultra miniaturized metal cased, pin te rminals. Center A Ultra compact .. . . . .. .. ...... . ... .. ............ 20, 21 frequency range 400 Hz to 20 kHz ........ . ... . .. . . 76 CG Transformers & inductors. High quality transistor, LBP Low Frequency .. . ................................ 83 filament and plate types ........... . ............. 42 FT Channel frame, filament / transistor transformers ...... 44 Low Pass HP Pre-amplifier or tuner power supply transformers ..... 25 FLH Fl at construction , metal cased with pin terminals. PF For photoflash and similar applications .. . .... . .... . 45 Cutoff frequency range 600 Hz to 5 kHz .... . ....... 75 FLL Flat construction , metal cased . Cutoff frequency R Replacement type inductors ..... . . .. ... . ....... 44, 45 3500 Hz to 50 kHz . ................... . . . ....... 75 R Replacement type line adjusting and isolation LLP Low frequency metal case. Cutoff frequency range transformers ... . ......... . .. . ... . ........... 44, 45 10 Hz to 15 Hz ................ . ...... . .. . .... .. 83 S Popular-priced series transformers & inductors ....... 43 LMI Miniaturized metal cased . Cutoff frequency range SC Signaling and control transformers . . .... . ......... . . 45 100 Hz to 10 kHz ......... . .......... . .......... 81 LML Miniaturized metal cased . Cutoff frequency range MAGNETIC AMPLIFIERS 1000 Hz to 12 kHz ..... . ....... . ... . ........... .. 81 LPM Ultra miniaturized metal cased with pin terminals. Product Selection Guide ........ . .. . ... . ................... 31 Cutoff frequency range from 200 Hz to 15 kHz .. . ... . 77 MAS High gain, solid state push pull types ... . .. .. ..... .. 49 PLF 400 Hz l ine .. . . . . . .. . .. . ..... . ......... . . . .. . ... .. 83 MAT For servo motors and other applications ......... . 48, 49 High Pass PULSE TRANSFORMERS FHH Flat construction, metal cased with pin terminals. General Information ..... ........... . . . ... .... .. . . . ...... 52, 53 Cutoff frequency 200 Hz ...... . ..... . .. . ....... . . 75 Product Selection Guide .................... . .. . . . .... . . .... 53 HMI Miniature metal cased . Cutoff frequency range 50 Hz to 3 kHz .. .. ..... . .... . . . .......... . ..... 82 BIT-P Metal encased transistor & flat pack types ... . ... . 54, 55 HML Mi niatu re metal cased. Cutoff frequency range H Molded : 200 Hz to 1 kHz ............................. . .. 82 Tube types, transistor types .......... . ...... 57, 58 HPM Ultra miniaturized metal cased with pin terminals. PIP Metal encased transistor types . . ....... . ....... . .. . 56 Cutoff frequency range 500 Hz to 4 kHz . .. . .. . . .... 77 AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS GENERAL INFORMATION ON AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS The audio transformer is defined by operation over This power level is typically measured at 1 kHz with a frequency band. Originally the audio band referred 5% maximum waveform distortion. In some of the prod- to the audible spectrum of frequencies, 15 Hz to 20 uct lines, this power is measured at the lowest frequency kHz. As it was found that the audio type transformer within the band pass. The DO-T, DI-T and PIL line are al l could be used successfully beyond this frequency range measured at 1 kHz, while the H series transformers are and for other functions, the applications broadened but measured at the lowest frequency. All other audio the name "audio" stuck. transformer products, because of specific applications, The basic functions of an audio transformer are vary in terms of the frequency at which th e maximum impedance matching, output, driver, interstage, line, power level of operation is specified. voice coil , etc . Basic operation information can be found on page 30 under Theory. The UTC catalog audio Custom Specifications line represents close to 500 commercial and MIL grade 1) Electrostatic & Electromagnetic Shielding components covering a frequency band from 5 Hz to Aud io transformers require more shielding , in most 250 kHz, at levels of mWs to KWs and ranging in cases, than any other type transformer. Because of the weight from 1 / 20 oz to 520 lbs. Custom designs cover low power levels they operate at , they may be sus- an even broader range of frequencies and power ceptible to radiated and line coupled interference. ratings . Electrostatic shielding is commonly used between UTC has broad experience in custom designing th e primary and secondary of a transformer to reduce transformers for special applications. Facilities are line coupled interference by reducing the interwinding ava ilable for full engineering discussion to work out capacity. This is accomplished by use of highly con- magnetics in early stages of equipment design. Fully duct ive materia ls, such as copper , silver or aluminum, equipped Electronics. Mechanical, and Chemical Lab- as a wrap around or between the coils of a transformer. orato ries with modern, accurate equipment are avail - Magnetic shielding is used to reduce radiated type able to aid in the design of custom transformers . interference from affecting a transformer. It is accom- plished by encasing the transformer in a single high permeability nickel-iron can, or several nickel-iron cans , Specifications depending upon the intensity of the radiation . More problems are caused by improper transformer specifications than by any other reason . These prob- 2) . Balance : Winding , Center Tap, Longitudinal , and lems typically affect price, manufacture, delivery and Hybrid. performance: Over-specification causes the price to be Many audio transformer applications require two high and unrealistic , and makes manufacturing difficult matched windings or winding halves. Depending upon and delivery long . Under-specification causes the per- the parameters to be compared and th e operating con- formance to be inadequate. dit ions, the type of balance required takes on a variety Specification control stems from product knowledge of names, as mentioned above. and application understanding . Low frequency winding balance requirements are generally limited to accurate turns ratios and extremely well matched DCR 's, while high frequency balance includes balancing of winding capacitances. Catalog Specifications 1) The primary and secondary impedances listed in 3) Insertion Loss and Efficiency the catalog are the rated source and load resistances Insertion loss is the ratio of useful power delivered, between wh ich the transformer's performance ratings to the input power supplied, the latter being a some- are determined. For instance, a unit rated at 500 ohms what larger quantity to overcome losses inherent in the primary impedance and 500 ohms secondary impedance power transferring device. It is expressed in db. would yield the rated response limits when the part is Efficiency expresses the discrepancy between power driven by a 500 ohm source and is loaded w ith a 500 supplied and power delivered. It is expressed as a ohm load. Reductions in source and/ or load im ped- percentage. ances below the rated values would " push" the response characteristics toward lower frequencies. 4) Transformer Phase Shift Conversely, higher than rated sources or loads edge A transformer is a series parallel network of complex the part ratings toward higher frequencies at the sacri - impedances and w ill exhibit phase shift from primary to fice of the lower portion of the rated frequency band. secondary as a function of frequency. Because its in- ductance is non-linear with applied voltage , phase shift 2) A listing of " CT" after the im pedance means that will also be dependent on input voltage level. the winding has a termination midway toward the total w inding turns (Center tap) . 5) Reflected Impedance and Return Loss 3) "Spli t" listing after the impedance rating means A transformer can be designed to reflect a specific that the total impedance rating shown is composed of impedance (within a reasonable tolerance) under a 2 separated windings . which when placed in series pro- particular set of operating conditions . A measure of the duce the larger of the two rated listings. When the wind- accuracy of the impedance reflection is referred to as ings are placed in parallel , the smaller of the winding Return Loss. ratings is achieved (¼ of the larger) . 6) Distortion 4) The maDC rating shows the maximum unbalanced This is a measure of conformance between the trans- DC current which can be taken in the wind ing without former input and output signal waveshapes. Alternately disturbing the rated response limits. The maDC rating it is a measure of the degradation of signal purity as it is not a measure of the maximum DC current which the passes through a device. part can tolera te. The maximum currents are a function of the wire sizes used in the part and the allowable heat By no means have we dealt with all of the terminol- rise for the part; the maximum AC power to be handled ogy of audio transformers with regard to specifications. also affects the analysis. Because of the complicated We have merely touched upon the surface as indicative interrelationships. maximum DC ratings are generally of the variety of customer requirements that UTC fre- not listed as catalog val ues. quently experiences. Specific requirements for tight 5) Milliwatt or maximum level is the power handling performance characteristics are best discussed with capability of the transformer in terms of power del ivered our engineering department to arrive at practical solu- to a matched load with a matched source impedance. tions based on the state of the art. 2 www.SteamPoweredRadio.Com www.SteamPoweredRadio.Com AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS STANDARD AUDIO TRANSFORMER & INDUCTOR SELECTION GUIDE PRODUCT SIZE FREQ. MAX . SERIES DESCRIPTION WEIGHT (Nominal) RANGE POWER PAGE Military Type : Grade 4, Metal Encased - -- --- - BIT-250 Ribbon style Kovar leads; compatible with transistor & IC .04 oz ¼" dx ¼" h 300 Hz to 80 mW 4, 5 flat pack styles. Transformers & inductors. 250 kHz ([1 l kHz D0-T Flexible I ½• Du met leads, Gold plated. Ultra miniature I / 10 oz 1/ 16 • d X 13/21 -h - - 300 Hz to 500- mW - 6, 7 transformers & inductors for transistor circuitry. 20 kHz @ I kHz -- DO-T200 Plug in- T0 -5 pattern. Ultraminiature transformers & in- I /8 oz .350" d x ½ 6" h 300 Hz to 100 mW 8 ductors for transistor style circuitry. 20 kHz @ l kHz DI-T -Fle·xib le I ½• Du met leads, Gold plated. Ultraminiat-ure 1/15 oz- 1/ 16 " d X ¼ • h 400 Hz to 500 mW --10 transformers & inductors for transistor circuitry. 100 kHz a l kHz - D-I -T200 Plug in- T0-5 pattern. Ultraminiature transformers & I / 15 oz - 5;\6• d X 1/s • h 400 Hz to 500 mW 11 inductors for transistor circuitry. 100 kHz @ I kHz PIL Ultraminiature transistor style unit. Flexible lead bundles, I /20 oz - 1%, -• d X ¼ • h 800 Hz to 100 mW 9 copper, tinned material. Transformers & inductors. 250 kHz @ I kHz -- H Tran-sfo-rmers--Fu-ll line -of in-put, int-ers-tage & output types .8 oz to 11/ 16 " X ½" X 19/ 31 " h 30 Hz to I mW to 12, 13, 14 for transistor & tube use. Chopper type transformers. I lb to 113;\6 X 11½6 X 2½ h 20 kHz 10 mW Inductors- range from .4 mhys to 450 hys. -- FHA Low profile a-ud-io u-nit, straight I • pin terminals for plug-in .8 oz 13/ 31 • X- 1½1" d X 9;\6 • h 300 Hz to 100 mW 12 mounting. 20 kHz @. 300 kHz FHI Low prof-ile -ind-uctor, -stra-ight pin terminal for plug-in use. .8 oz 13/21" -X 1½1 " d X 9/16 " h 15 Mh -64maDC 12 15 mhys to 2.4 hys. to 2.4 ~ ys-2maDC - - w Qualified to Mil Stds. print No.'s MS 90000-1 to 90008-1. .6 lbs - I¾" sq. x 21/s " h 300 Hz to 2 W 15 (Mil Std) Inputs, interstage & output types. 10 kHz ([1 300 Hz Military Type: Grade 5, Molded SML IP lug-in input or chopper type transformer. .-03 l-bs · ½6 "- X 3-¼,"- X1 -/16"- h 200 Hz to 10 mW 16 20 kHz @' I kHz SSO-P Transistor & tube type transformers. Input, interstage, .04 lbs ¾ • X 1/s" X 9/16 • h 300 Hz to 100 mW 16 output & inductors. 20 kHz 0 300 Hz SO-P Transistor & tube type transformers. Input, interstage, .05 lbs ¾" X l X 13/21-" h - 200 Hz to 250 mW -17- output & inductors. 20 kHz @ 200 Hz Industrial Type: Cased, non-hermetic ---- ---- 0 Excellent quality compact audio transformers & inductors, l oz Vs"d X 11/16" h 300 Hz to l Watt 18 full range of transistor & tube applications. 20 kHz p Octal socket plug in style unit. Tube application type. 2 oz 13/21 " d x 115/21 " h 300 Hz to -8DBM -1-9 -- -- - - - - 20 kHz I 6.3 mW -- A Ultra compact wideband transistor & tube type trans- ½ lb - I½ " sqx 2" h 10 Hz to 5 Watt 20, 21 formers & inductors, hybrids & choppers. 50 kHz LS Linear standard transformers. Hi- fidelity, highest quality. 3 lbs to 21/a" x 3½ " x 3¼ • h 7 Hz to Low level. 22, 23 Tube & transistor types. Includes low dist. high efficiency, 520 lbs to 13" X 15¾' X 28" h 50 kHz to 2.5 KW shielded types, hybrid transformers. Broadcast quality. -- HA Excellent quality audio transformers for mixing, matching ·- 2 lbs to 11 1/ 16 " X 21/s " X 3½ " h 20 Hz to +18 dbm 24, 25 and tube application. Many units are of hum-bucking 5 lbs 213/16 . X 31/16. X 3½ . h 50 kHz to 20 W construction. CG High quality transformers for mixing, matching & tube ¼ lb to 11/a " sqx2¼ " h 40 Hz to +28 dbm to 26 circuit applications. 82 lbs to 7" X 12" X 9" h 15 kHz I 600W CAT High quality transformers designed with high copper .5 lbs l ¾ • sq. x 2¼ • h 50 Hz to 5W 26 efficiency for transistor use. 15 kHz I - s Popular priced special series of transformers & inductors. ' 5l 2 lblb tso to 7I1¾/s •• xsq 9.¼ x • 2 1x1/ 160"¼ h • h 1010 HkHz zt o I 02 5d0b mW 27 - LAB Highest quality transformers designed for laboratory circuit 3 lbs to 3½" X 31/a" X 3¼ • 20 Hz to 50 mW to 15 development investigation. Input, interstage & output 15 lbs to 511/16 • X 5• X 411/16 " 20 kHz 50 W transformers terminated with solderless lugs for a multi- plicity of connections for design aid use. Industrial Types: Open Frame, non-hermetic SSO IF lexible lead type transformers & inductors for tube & .02 lbs 300 Hz to I 100 mW 16 transistor application. Channel frame available. 20 kHz so Small, broadband type, flexible lead type. Transistor & tube .03 lbs 200 Hz to 1 250 mW 17 It ypes. Channel frame available. 20 kHz 3 AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS ~ THE BIT-250 '~INE A COMPLETELY NEW DEVELOPMENT IN TRANSFORMER TECHNOLOGY PACKAGING Size reduction without loss of per- f ino rtmhaen cmea gisn eatcich iceivrceudi t.b yC omrea jopre rmedeuacbtiloitny ocflo aseirl yg aapps- NOTES proaches the theoretical maximum for material and • FREQUENCY RESPONSE ± 2db, structure. 300 Hz- 250,000 Hz, @ 1 MW Ref. Materials, dimensions, and surface finish are iden- level tical with IC Flat Pack standards. Removable support protects terminal alignment prior to final assembly. • DIELECTRIC STRENGTH tested Th is insulated support allows testing in conventional @200V RMS jigs. • MIL SPECS To complete MIL-T- 27C Specs. Metal encased , rugged- RELIABILITY Cylindrical bobbin-winding tech- ized, Grade 4, Class R, Life X. See niques eliminate corner stress normally found in fine- pages 86, 87 wire windings of conventional rectangular structures. Lead arrangements and terminations have been • SHIELDING All units electromag- designed to maximize reliability under thermal shock netically self-shielded and temperature cycling . • LEAD MATERIAL Gold-plated rib- bon-style Kovar, solderable and FLEXIBILITY The stock units shown on facing weldable-MIL-STD 1276 Type K page are designed to afford maximum flexibility of application. Transformers are ?-terminal types, with center- tapped primaries and split secondaries. When con- BIT - 250 TERMINATION ADAPTABILITY n ¼e ctheed iimn ppeadraanllceel , asnpdl itt-wwiicned inthge sDeCc ocnudrarreinets cparpoavbidile- FOR PLUG-IN PC APPLICATIONS ity as series connections. Inductors in the stock line include both single- winding and split-winding types. SPECIALS BIT-250's not found in the stock line will be designed to customers' requirements : A. B. C. D. • Special electrical parameters BIT-250 stock units are manufactured with Flat • 10 or more leads Pack type terminations extending outward. • Special termination arrangements, such as Terminations may be bent for adaptation to gold-plated straight pin leads, ribbon-style plug-in applications. Unique termination con- leads perpendicular to the terminal board for figuration isolates strain and affords safety " dual in-line" packaging, etc. during bending process. Variations of bends are pictured above. • Operation to 130°C per MIL Class S. A. Right-angle bend outside the confines of the unit. B. Right-angle bend inside the confines of the unit. BIT-250's C. Right-angle bend at the confines of the unit. ASSEMBLED WITH FLAT PACK IC's D. (As C, above} with three terminations eliminated. ON PRINTED BOARD Bending may be done by c ustomer or by UTC on special order. PLUG-IN PIN TERMINALS AND OTHER PROFILES AVAILABLE ON SPECIAL ORDER J' 4 www.SteamPoweredRadio.Com www.SteamPoweredRadio.Com AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS 5 4 3 2 I NON CONOUCTIVE TEST a SHIPPING SUPPORT c,: TO BE Q,[1 FRO M UNIT BEFORE ASSE MBLY. ~ (00 NOT }EAR BY HAND) o !. .010 ~ .2 50 DIA DOT IDENTIFIES PRIMARY TER M. N~ I...,. t• -- --< BIT-250 ACTUAL SIZE Los .004 x .016 RIBBON STYLE MIL .STD. 1276 A TYPE K GOLD PLTD. WEIGHT- I .I GM. PATENT APPLIED FOR TRANSFORMERS Power Level I( Series Turns Ratio Sec Imp n mW for I Pri Conn.) Pri / BIT-250 MIL Pri (Split Wdg) 5% Max Dist OCR I Sec Overall Typical Type No. Type Imp !! Series Par (f, 1 kHz n OCR n Pri /Sec/Sec Sec Application BIT-250-14 TF4RX17YY 150 CT I 12/ 3 80 16 I 1.85 7.1 :1: 1 3.54 :1 Output I I BIT-250-18 TF4RX1 7YY I 300 CT 600/ 150 80 30 65 1.4 :1: 1 1: 1.4 Output or Matching BIT-250-20 TF4RX17YY 400 CT 400/ 100 80 45 45 2: 1: 1 1: 1 Match ing or Interstage BIT-250-26 T F4RX17YY 500 CT 50/ 12.5 80 58 5.5 6.32 :1:1 3.16 :1: 1 Output BIT-250-30 TF4RX1 7YY 600 CT 600/ 150 80 65 65 2 :1: 1 1: 1 Isolation or Matching BIT-250-36 TF4RX17YY 1000 CT I 1000/ 250 80 110 100 2 :1 :1 l :1 Output or Matching BIT-250-40 TF4RX12YY 1500 CT 600/ 150 I 75 150 65 3.16 :1: 1 1.58:1 Output BIT-250-48 TF4RX12YY 2000 CT sooo12000 I 75 177 745 1: 1 :1 1: 2 Isolation or Interstage BIT-250-56 TF4RX12YY I lOK CT 500/ 125 75 900 45 8.92 :1: 1 4.46 :l Output or Driver BIT-250-60 TF4RX12YY !OK CT 1200/ 300 75 900 100 5.78 :1 :1 2.89 :l Driver BIT-250-64 TF4RX12YY !OK CT 2000/ 500 75 900 160 4.48 :1: 1 2.24 :1 Interstage BIT-250-70 TF4RX12YY lOK CT I !OK/ 2500 75 900 750 2 :1: 1 1: 1 Isolation or Interstage BIT-250-90 TF4RX12YY 25K CT 1000/ 250 40 2400 78 I 10 :1: 1 5 :1 Interstage INDUCTORS BIT-250 Inductance Hys ® ma DC Res Type No. I MIL Type I Connections Min a 1 kHz 5V DC n Ratio or Wdgs BIT-250-03 TF4RX20YY Series 8.6 0 2260 1:1 (2 wdgs) I 2.5 2 Parallel 2.4 0 565 I .63 4 BIT-250-05 TF4RX20YY 5.5 0 1000 (1 wdg) 1.5 2 BIT-250-06 TF4RX20YY .80 1 250 (1 wdg) .25 6 BIT-250-09 TF4RX20YY Series .60 0 146 1:1 (2 wd gs) .15 5 I Parallel .10538 10 37 FOR FURTHER CHARACTERISTICS SEE NOTES ON OPPOSITE PAGE. 5 AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS • DO-I" TRANSISTOR TRANSFORMERS & INDUCTORS FREQUENCY HERTZ PACKAGING Hermetically sealed. A UTC pioneered struc- 200 400 600 IK 20K ture. The bobbin is completely rigid eliminating stress and wire movement. The turns are circular in shape rather than square , eliminating turn corner stress and effecting uniform wire lay. No tapes are employed in connecting coil wire and external leads. They are rigidly anchored in secure terminal board fashion providing strain relief. The leads used on the stock DO -T transformers are insulated solid .016 diameter Du met leads For plug-in type see page 8. MIL SPECS To complete MIL-T-27C Specs. Units are fully ruggedized, hermetically sealed , metal cased to Mil Grade 4, TYPICAL OO -T PERFORMANCE Class R, Life X. See pages 86, 87. LSOOAUD!l CE,: RAATED PSREIC. . IMP., AND 0 .C. U,1.PAT. NG. .......I . PERFORMANCE The radically designed UTC DO-T Family (see pgs . 6 thru 11) trans istor transformers provide unprece- dented power hand ling capacity and reliability, coupled with small s ize. Electrical parameters and areas of application ex- ceed conventional transformer capabilities. Curves on this and pages 8, 10 & 11 indicate their performance TYPICAL DO- T compared to that of similar size units now on the market. These curves show representative performance of all DO-T's PRINTED CIRCUIT and DI-T's except 200,000 ohm units. Higher performance is obtained when used in pushpull with balanced DC. Other man- POS ITIONING ufacturers' comparative performance is shown on these curves to put unjustified claims in perspective. For example, the UTC DO-T10 delivers 100 mw @ 5% distortion @ 300 Hz. Identical measurements were made on contemporary manufac- turers' equ ivalent , rated at 50 mw @ 300 Hz. Actual delivered power was under 1 mw @ 7½ % dis tortion @ 300 Hz. FREQUENCY RESPONSE ± 3 db 300 Hz to 20 kHz. APPLICATION Units can be used for different impedances from those shown, keeping in mind that impedance ratio is constant. Lower source impedance wil l improve hum bucking response and level ratings .. . higher source will reduce them. Units may be used reversed, input to secondary. The fre- quency response curve on this page is shown to 20 kHz. This descriptive curve is not meant to be restrictive. Units can be used at frequencies well above 20 kHz. Sat isfactory applica- SPECIALS For indication of possibilities of DO-T Family t ions for frequencies up to and above 100 kHz have been units custom built to your special requirements , see special developed. DO-T units on page 29. The stock DO-T Family are Grade 4 Class R units, for a maxi- PULSE APPLICATION In pulse coupling impedance mum operating temperature of 105° C in accordance with MIL- matching applications, (when measured with a 30 micro- T-27C Specs. On special order they can be designed to Class seoond input pulse voltage wave). typical val ues for these S requirements of MIL-T-27C (130° C maximum operating tem- transformers are : 5% or less droop, zero overshoot and less perature) . No additional life expectancy is gained by ordering than 10% backswing. Class S insulat ion systems for applications in the vicinity of Class R temperatures. Where the operating temperatures are above 105° C, the use of Class S insulations will afford greater RELIABILITY The except ional reliability of DO-T family life expectancy. units , inherent in their unique structure, has been dynamically Special units with electrical modifications of changed lead p roven in the field . lengths, modified impedance ratios , and additions of electro- static shields, etc., are available for all DO-T family units. SHIELDING Hipermalloy electromagnetic shield available Stock units cover general purpose applications. For specific from stock for all DO-T family units except PIL. applications cost reductions may be effected. INDUCTOR DO-T™ LISTING Type MIL No. Type DD-TSO TF4RX20YY Series connection : .075 Hy @ 10 ma DC, .06 Hy @ 30 ma DC, OCR 10.5 ohms (2 wdgs.) Parallel connection: .018 Hys @ 20 ma DC, .015 Hys @ 60 ma DC, OCR 2.6 ohms DO-T28 TF4RX20YY .3 Hy @ 4 ma DC, OCR 25 ohms .15 Hy @ 20 ma DC -- DO-T27 TF4RX20YY 1.25 Hys @ 2 ma DC, OCR 100 ohms .5 Hy @ 11 ma DC DO-T8 TF4RX20YY 3.5 Hys @ 2 ma DC , OCR 560 ohms l Hy @ 5 ma DC -- DO-T26 TF4RX20YY 6 Hys @ 2 ma DC, OCR 2100 ohms 1.5 Hys @ 5 ma DC - - DO-T49 TF4RX20YY Series connection: 20 Hys [I l ma DC, 8 Hys f 3 ma DC, DC~ 5100 ohms (2 wdgs.) Parallel con nection : 5 Hys 2 ma DC, 2 Hys 6 ma DC, OCR 1275 ohms FOR POWER 00-T TRANSFORMERS ( OO-T400 SERIES) SEE PAGE 37. 6 www.SteamPoweredRadio.Com www.SteamPoweredRadio.Com AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTOM TRANSFORMER DO-T™ LISTING Locating Type MIL Pri. D.C. ma. t Sec. Pri . Mw Line No. Type Imp . fl in Pri. Imp.fl DCRfl Level * Typical Appl ication l DO-T44 TF4RX17YY 80 CT 12 32 split 9 .8 500 Int erstage o r matching or output 100 CT 10 40 spli t 2 DO-T29 TF4RX17 YY 120 CT 10 3.2 10 50 0 Single or PP output 150 CT 10 4 3 DO-T12 TF4RX 17YY 150 CT 10 12 11 500 Single o r PP output 200 CT 10 16 4 DO-Tl3 TF4RX 17YY 300 CT 7 12 20 500 Sin gle or PP output 400 CT 7 16 5 DO-T19 TF4RX 17YY 3O0- CT 7 600 19 500 Output to line o r matching --i;- - oo:-n o - TF4RX f 7YY 320- CT - 7 3.2 20- .._500 -Si ngle or PP output 400 CT 7 4 7 DO-T43 - TF4RX17YY 400- CT - 8 40 split 46 500 Interstage or matching o r outpu t 500 CT 6 50 split 8 DO-T42 TF4 RX 17YY 400CT - 8 120 sp l it 4 6 500 Interstage 500 CT 6 150 split 9 DO-T41 TF4RX 17YY 4007::T- - 8 400 split 46 500 Interstage or outp ut or ma tching 500 CT 6 500 spli t (Ratio 2 :1 :1) also wide pu lse application 10 DO-T53 TF4RX17YY 400 CT 8 4000 CT 46 500 Input or driver to low noise 500 CT 6 5000 CT transistor 11 DO-T2 TF4RX 17YY 500 3 50 60 100 Outp ut o r ma tching 600 3 60 12 D0-T20 TF4 RX 17YY 500 CT 5 .5 600 31 500 Output or line to line or mixi ng o r matching 13 DO-T4 TF4RX f7YY 600 3 3 .2 60 100 Output o r ma tching WEIGHT 1/10 OZ 14 oo:-n4- ~F4Rxf7YV- >----600 CT 5 12 43- '7 roo- Single or PP ou tput 800 CT 5 16 15 DO-T31 TF4 RX 17YY 640 CT- - 5 3.2 43 500 Single or PP output or ma tching 800 CT 5 4 Un it locating Key 16 DO-T32 TF4RX 17YY 800 CT 4 3.2 51 500 Single or PP outpu t Type Located 1000 CT 4 4 No. on Line 17 DO-T15 TF4RX 17YY 800- CT 4 12 51 500 Single or PP output DO-Tl 41 1070 CT 4 16 - DO-T2 11 18 DO-T21 TF4RX 17YY 900- CT 4 600 53 500 Output to line D0-TJ 19 -yg - oo-:-n TF4RX 13YY 1000 3 50 115 100 Output or matching 1200 3 60 - D0-T4 13 - DO·TS- - - 2~ 20 DO-T45 TF4RX 12YY 1000- CT 3 .5 16,000 sp lit 120 100 Inter stage (ratio 1:2:2) also wide 1250 CT 3 .5 20,000 sp l it p ulse application - DO-T76_ __ 4374- 21 DO-T16 TF4RX13YY 1000- CT- - 3.5 12 71 500 Single or PP output 1330 CT 3.5 16 - DO•T8 Pg. 6 22 DO-T33 TF4 RX 13YY 1060- CT- - 3.5 3.2 71 500 Single or PP output - DO -T9_ __ 35- _1330 CT 3 .5 4 DO-T l 0--36- 23 DO-T5 TF4RX13YY- - 1200 2 3.2 105 100 Output - DO-Tl 1-- 39- 24 DO-Tl7 TF4RX13YY 1500 CT 3 12 108 500 Single or PP output 2000 CT 3 16 - DO-Tl 2-- 3 ~ 5- - DO-T22 TF4RX13YY 1500- CT 3 600 86 500 Output to line or match ing D O-T13 4 - 26 DO-T34 TF4RX 13YY 1600 CT 3 3 .2 109 500 Single or PP ou tput - DO-Tl 4---14- 2000 CT 3 4 - DO·T15-- l 7- 27 DO-T51 TF4RX 13YY 2000 CT 3 2000 split 195 100 lsol. or interstage (Ra t io 2:1 :1) ol):T1 s--21- 2500 CT 3 2500 split Also wide pulse application -Do-n 1 24 28 DO-T37 TF4 RX 13YY 2000- CT 3 8000split 195 100 l sol. or interstage (Ratio 1 :1:1) DO-Tl 8_ __3 _0_ 2500 CT 3 10,000 split also wide pulse application ol):T19_ __5 _ 29 DO-T52 TF4R X 13YY 4000 CT 2 8000 CT 320 100 Interstage 5000 CT 2 10,000 CT Includes electrostatic shield - DO-T20-- 12- 3 0 DO-T18 T F4RX 13YY 7500 CT l 12 505 100 Single o r PP output D0-T21 18 10,000 CT 1 16 D0-T22_ __2 5- 31 DO-T35 TF4RX 13YY 8000- CT 1 3.2 505 100 Single or PP output - D0-T23_ __4 2- 10,000 CT l 4 - D-0 -T2,.----,.~ 32 DO-T48 TF4RX 13YY 8000- CT l 1200 CT 640 100 Inter stage 10,000 CT 1 1500 CT Includes electrostatic shield D O-T25 37 33 DO-T47 TF4 RX13YY 9000- CT l 9000 CT 850 100 Isolation or interstage D O-T26 Pg. 6 10,000 CT l 10,000.CT Includes electrostatic shield 0 0 -T27 Pg. 6 34 DO-T6 TF4RX 13YY 10,000 1 3.2 790 100 Output - D0-T28 Pg. 6 35 DO-T9 TF4RX13YY 10,000 1 500 CT 780 100 Outpu t or driver - DO-T29 2 12,000 1 600 CT D O-T30 6 36 D0-TlO TF4RX 13YY 10,000 l 1200 CT 780 100 Driver - DO-T31 15 12,500 1 1500 CT DO-T32 16 37 DO-T25 T F4RX 13YY 10 ,000 CT 1 1500 CT 780 100 Interstage 12,000 CT 1 1800 CT - DO -TJJ 22 38 DO-T38 TF4RX 13YY 10,000CT 1 2000 spli t 560 100 Interstage D O-T34 26 12,000 CT 1 2400 split - DO-T35_ __3_ 1_ 39 D0-Tll TF4 RX13YY 10,000 1 2000CT 780 100 Driver DO-T36 40 12,500 1 2500 CT - DO-T37--2-8 - 40 DO-T36 TF4RX 13YY 10,000 CT l 10,000 CT 975 100 l sol . or interstage (Ratio 1 :1 ) - DO-T38 38 12,000 CT 1 12,000 CT also wide pulse application D O-T39 43 41 DO-Tl TF4RX 13YY 20,000 .5 800 830 5 0 I n terstage 30,000 .5 1200 - DO-T40 44 4 2 DO-T23 TF4 RX 13YY 20,000 CT .5 800 CT 830 50 Inter stage D O-T41 9 30,000 CT .5 1200 CT D - DO-T4_23 ___78 _ 43 DO-T39 TF4 RX13YY 20,000 CT .5 1000 split 800 50 I nt erstage 30,000 CT .5 1500 split DO-T44 1 4 4 DO-T40 T F4RX 13YY 40,000 CT .25 400 sp lit 1700 50 Int erstage or outpu t 50,000 CT .25 500 split - DO-T4S 20 - DO-T46 46 4 5 DO-T54 TF4 RX 13YY 40,000 CT .25 4000 CT 1700 50 Interstage or isol. to low noise 50,000 CT .25 5000 CT t ransistor - Do-:-T47 33 46 DO-T46 TF4RX16YY 100,00 0 CT 0 500 CT 7900 25 Input (usa b le for chop per service) DO-T48 32 Includes electrostatic shield D O-T49 Pg. 6 47 DO-T7 T F4 RX 16YY 200,000 0 10 0 0 8500 25 Input DO-TSO Pg. 6 48 DO-T24 T F4RX 16YY 200,000 CT 0 1000 CT 8500 25 Inp ut ( usa b le for chopper se rv ice) c o-Ts-,-- 27- 49 DO-T400 TF4 RX03 YY Power DO-T , see page 37 DO-TS2 29 50 DO-T410 TF4 RX03YY Power DO-T, see page 37 DO-TSJ 10 51 DO-T420 TF4RX03 YY Power DO-T, see p age 37 - DO-TS4 45 DO-T40_0_ _ 4_9_ D0-TSH Drawn Ho permalloy shield and cover for DO-T's provides 20 to 30 db sh1eld1ng, 15A;. h x 23A;.· d,a, 'le" hole ,n cover - DO-T410 50 •For 5% maximum disto rtion @ 1 kHz . tma DC-shown is for single encfed usage. For push pull, ma DC can be any balanced val u e taken by .SW t ransistors. - DO-T420 51 Where windings are l isted as split, ¼ of the listed impedance is available by paralleling the winding. 7 AUDIO AND HIGH FREQUENCY TRANSFORMERS & INDUCTORS • DO-T 200" TRANSISTOR TRANSFORMERS & INDUCTORS NEW DO-T 200TM SERIES PACKAGING Hermetically sealed. 00-T family unit. See page 6. MIL SPECS To complete MIL-T-27C Specs. Ruggedized , metal encased to Mil Grade 4, Class R, Life X. See pages 86, 87. FREQUENCY RESPONSE ±3db, 300 Hz to 20 kHz. TERMINALS Leads are .016 Dumet wire, gold plated, and may be either welded or soldered. They are uninsulated and are spaced on a .1" radius circle, conforming to the termina- • I tion pattern of the " T0-5" cased semiconductors and micro- I ·4 logic elements. 9a, .,1 ~00 -2~F0"R0E O-UE4N0-C0Y ~H6E0R0-T Z -I K ~ZOK