TE-36 ETC2
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Technical content
File Catalog: Electron Tube Products 6754 Section: Receiving Tubes . “Bendix” Type TE-36 (Generic Type 412A) FULL-WAVE RECTIFIER
DESCRIPTION
fh This miniature, full-wave, high-vacuum rectifier is one of ‘ the Bendix Red Bank line of reliable vacuum tubes specif- ically designed for aircraft, military and industrial appli- cations where freedom from early failures, long service life, and uniform operating characteristics are extremely Te important. Each tube is given a 45-hour run-in under vari- el ous overload, vibration, and shock conditions likely to be : encountered in service. This run-in serves to reduce early 6754 failures by eliminating tubes with any minor defects that POEINUSA, might lead to failure under actual operating conditions. Bendix In addition, this tube is designed for use in equipment with high ambient temperatures and where high levels of a vibration, shock and other accelerations are encountered. % i Careful exhaust to a high degree of vacuum with thorough ed t outgassing of all elements with electron bombardment is ss employed to ensure long life expectancy. A hard glass hin eli (nonex) bulb and stem with nickel pins are used. These, you together with a conservative design center of cathode “ee temperature, permit operation of these tubes up to bulb temperatures of 300°C, in contrast to an average of 175°C for soft glass bulbs. In addition, because of the ELECTRICAL RATINGS* lower expansion of the tungsten-nonex seal (about one- Heater voltage** 6.3 volts third that of conventional lime or lead glass), greater Heater current _ 1.0 amp resistance to thermal shock is obtained. The nickel Peak i st eee 1450 volt pins are gold plated to assure excellent contact resistance eak inverse vOMAge non: volts throughout life with freedom from corrosion. Cathode heating time... 45 sec. These micas do not touch the hot elements of the tube Total effective plate supply imped. which avoids deterioration of the mica and consequent ance—iper plate)... See Rating Chart 3 loss of emission. Mica in contact with the hot cathode Per pl cosessnnecceceee S@ Rating deteriorates even more rapidly under shock and vibra- For maximum current and voltage ratings, refer to tion. Ceramic eliminates this problem and, furthermore, Rating Chart 1. reduces damage caused by fatigue failure of parts. *To obtain greatest life expectancy from tube, avoid designs where M EC HAN ICAL DATA the tube is subjected to all maximum ratings simultaneously. a Yoltage should not fluctuate more than +5%. BOSC. occ eee 9 Pi Miniature Nenex Gless— Bulb eee ee eeeeceeeecceessssesssesNonex Glass—T6% Input to Filter Max. Seated Height... 2%" Capacitor Choke Max. Diameter 0000-00 .0---cce-oeceeeeeeeee Th” Heater voltage (Volts)..0000.000c ce 68 6.3 Mounting Position _ any RMS plate supply voltage (volts per plate) 325 450 Max. Bulb Temperature... 300°C DC output current (mA)... 100 100 (100 hour shock excited fatigue DC output voltage (volts) test, sample basis) At full-load current (100 mA)... 325 385 *See oltitude chart on page 3. THE Grommo/jx CORPORATION Pred Bonk’ Division, extontown, new sersey Publication No. R61-11 Printed in U.S.A.
(Generic Type 412A) ELECTRICAL CHARACTERISTICS AND TEST DATA SPECIAL TESTS In addition to the production and design tests shown under “Electrical Characteristics and Test Data’, other tests are performed on a sampling basis to assure a high out-going quolity level. See below: TEST CONDITION DURATION On 2; min. TEST CONDITIONS AND CHARACTERISTIC LIMITS Heater Cyling ony, a 2,000 On-08 Life Test cycles. All Tubes ore Stabilized for 45 hours under Test Conditions A & B a Sve | and 2 G Vibration at 30 cps prior to 100% Testing. Glass Strain Test Boiling water Ye Ice | 3 minus in water ac TEST ‘DESIGN 7 OO CHARACTERISTIC _ | CONDITIONS | SvMvet CENTER ots fish ee 50 See Excitin 100 hours PRODUCTION TESTS | ofc: rep ree Heater Curent ee DO Aide Test 60,000 Feet S minutes Heater Cothode Leakage [faim | = eso tte Under “Test Operation Te |e | 9s | 10 | ‘made igh Tome. Conditions” | 1,000 hours Emission [oe ss | made - Bald Temp. 300 | - ‘Short_and Continuity I | _ Life Expectancy Test | Under Test Conditions | 5,000 hours Tbraion 25 6, 25 a | Coo a oun Inpection 100% Tesicoxcopie Inspection insolation of Electrodes [|] > TR Too PTT egos Of 1S posible Trouble Points HeaterCathode Leakage [ete ta nae est conpirions | et | tpe/p | & | ft | m | ca | zor/o | the EFFECT ON LIFE OF INCREASED RATINGS Bris v_ [7 Voc | vde [vse ohms [ot [ohms | Ve —————— a a = 500 borin OPERATING CONDITIONS a pplication Notes CS Os OO _ Canencrenistic | CONSERVATIVE] TYPICAL | MAXIMUM D Pe | ieoter Voltage) 6aV = 7% [sav = Su[e3V = 10% E sO) HK Voltage GY “av | sv eok Plate Corret Peak Plate Inverse Output Current pares | ama | 90a | oma Bulb Temperature _s*¢ xe 300°C Attitude | 0-20,000t. | 60,0001, | 80,000 ft. Vibration _26 56 we LIFE EXPECTANCY MAXIMUM, HIGH MEDIUM es er 4 [tort wen ne | Tore wil venoee | SoeiN ony a | my t 3 wea S| reeeze muses of eu 2 | t\\) 4 5 Cool Romi0s resitTuace or Than 5 it om ior 5 Penmssis.e g | "Sewes aeotance ope, | Pod eee | H re | scqemarowen vourace ! = ! 1 F i s |r | | \\ 5 Bao. ei} | 1 i e ES ee er rr Al B ton cameron ne i i bod xecrmemion encencrenie, |} i | | i Py | ya | | | hha aa | | Ee at ala tig, % ts 3a— 36 ae Osa RATING CHART 1 RATING CHART 2 RATING CHART 3
“Bendix” Type TE-36 (Generic Type 412A) APPLICATION NOTES 380, eae | For reliable operation special consideration should be given vot! |) TT Tyr yy to the maximum ratings, of the 6754. These ratings are limiting rr TL fT itt absolute values and if exceeded may seriously impair the reli- TTT TT rT TTT ability of the tube. Therefore, the equipment designer should aso J determine an average design value for each rating so that vari- LT TTT Pray Ty yt ations in supply voltages, load, and components do not cause Zo ||) Ty TT Te the absolute values to be exceeded. The bulb temperature rat- : Plt YETTTy TT ing is an extremely important characteristic which should not be FA Clay exceeded if expected life is to be achieved. E 80 a a es ae
3 TT YE il Reliability and performance will be jeopardized if filament
go] 7, pas aoamacrenan | voltage ratings are exceeded. Life and reliability of perform- 3 100}—+ /1 FOR’ OESIGN ONLY NOY —t ance are directly related to the degree that regulation of the ATT TTI ct heater voltage is maintained at its center rated value. “TATTLE LLLLLLLA From Rating Chart 1, operating conditions should be selected vA to insure usage within the area of permissible operation with ATT TTT Tt Te rr) choke or capacitor inputs. ° 10 20 30 40 30 60 10 PLATE VOLTAGE (WOLTS) To insure that the maximum peak plate current is not ex- ceeded a choice of operating values of d-c output current per plate and rectification efficiency should be made such that they AVERAGE PLATE CHARACTERISTICS fall within the area of permissible operation of Rating Chart 2. Rating Chart 3 graphically represents the relationship be- woo ‘20 tween the maximum a-c plate supply voltage per plate and the CLL rT. 4 minimum plate supply resistance per plate to prevent maxi- 2 rao” mum transient currents from exceeding the peak surge current Be 400] [ee 20 a rating of the tube. The plate supply resistance Rs=R(sec) + a Wtipel Ro, where zs oo | | | | | SBS 1022 R(sec) = d-c resistance of each section of transformer secondary, Ferree ere tle No Translormer vollage step-up rofio per section, | Ripri) = d-c resistance of transformer primary, O10 203048 BOBO 90° Ra == dec resistance of added series resistance per plate. ALTITUDE THOUSANDS OF FEET The addition of inductance would cllow a reduction of the minimum Wis CHART I9 INCLUDED AS AN ILLUSTRATION OF THE AMOUNT value specified for Rs provided the reactance added is no! too small OF CURRENT DERATING NECESSARY IN A SPECIFIC APPLICATION as to cause the maximum peak surge plate current and maximum TO AVOID. EXCEEDING THE MAXIMUM BULB TEMPERATURE. EACH Steady-state peck plate current ratings 10 be exceeded. APPLI¢aTION SHOULO BE CHECKED TO DETERMINE. THAT THE Main auL@” TeuPERaTUnE 10 Nor EXCEEDED. "rrwe The increased rating chart is presented to emphasize the DERATING OR COOLING " dangers of operating simultaneously at or near all maximo. In CRITERIA FOR OERATING FOLLOWS : general, the effect on life of operation at increased ratings is |. VOLTAGE DERATING -T0 KEEP BELOW additive and cumulative. Interpolation within this chart will give 2. CURRENT. DERATING 70 KEEP BULB the designer a general idea of the life expectancy and reli- TEMPERATURE BELOW MAX RATING ability of his application. Each proposed application should be life tested under maximum environmental conditons in order to check that the design gives the desired reliability. When con- ALTITUDE RATINGS servatively used this tube has a life expectancy of 10,000 hours. gf — 1 oi 4 psx 2 | one { 36° > 38° | | 1 Lf KP & Z on / +005" / 468 cse€ri0n 2) (seeHON 1 Pin Locarions NcHESONEESS OTNERWISE oven, oven ‘SPECIFIED eAaTHove caTHooe EERE (seerion 2) ‘ren HEATER HEATER OUTLINE DRAWING BASE DIAGRAM OUTLINE DRAWING
“Bendix” Type TE-36 (Generic Type 412A) CATHODE ANCHORED SECURELY BY GETTER RESERVE FOR LONG LIFE LOCKING TAB TO CERAMIC SPACER LARGER CATHODE AREA AND INCREASED ELECTRODE SPACINGS MICAS USED FOR BULB SUPPORT AND GETTER SHIELD ONLY CF dat | EYELETS LOCK STRUCTURE \\F x ( * FR, TOGETHER SECURELY Z y PRESSED & PUNCHED CERAMIC Pp 13.2 | SPACERS PROVIDE STABLE Z a Res HEAVY PLATES AND SHORT ELEMENT SEPARATORS REDUCING ae Ea al Si. Yj MOUNT STRUCTURES TO GAS RELEASE AT HIGH TEMPERA-|\\ P4 MA . Y INCREASE RIGIDITY TURE AND UNDER VIBRATION y TH | mh 4 y a | LEA Ml) /
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Yj ba! 4 SOLID EXTRUDED CERAMIC it i Y HEATER INSULATOR AND 4 | bl |, y COILED HEATER PROVIDE NICKLE SLEEVES ON g y 4 RELIABLE LONG LIFE HEATER TUNGSTEN HEATER-LEGS PRO- | //j 1 | | | 4 VIDE STRONG SWAGED WELD ) | i g G pL ELT | Yj Kl aa Y HEAVY HEATER BUS HEATER BUS WRAPPED AROUND y go Stet > Z PROVIDES FIRM ANCHORING HEATER SLEEVES & WELDED Sa P= « nr) AT TWO POINTS HELPS TO Pg ot my ELIMINATE POSSIBILITY OF A BAT { Y\\ OPEN HEATERS S ALE yh y a 4 NONEX "HIGH TEMPERATURE" STEM LEADS EXTEND THROUGH y ‘ SutecrnceDOm FROM cas. ENTIRE MOUNT STRUCTURE i » RELEASE & ELECTROLYSIS FOR ADDED STRENGTH | AT HIGH TEMPERATURE NICKLE PINS-GOLD PLATED | | i) FOR LOW CONTACT RESISTANCE & FREEDOM FROM CORROSION BUTTON STEM-STRENGTH IN ALL PLANES STRUCTURAL FEATURES OF 6754 PROVIDE HIGH RELIABILITY AND LONG LIFE a THE GemojvCORPORATION Red Cont’ Division, extontown, new sersey West Coost Salar & Service: 117 £. Providenci. Ave., Burbonk, Calif Export Soles & Service: Bendix Iniernotione! Division, 205 f. dnd St. New Yor 17, MAY. Concdion Distributor: Computing Devices of Coneda, Lid., P.O. Box 508, Ottewa 4, Ontarie