7212

6146W ETC

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Technical content

90 WATTS CW INPUT 60 WATTS CW INPUT

(1CAS) UP TO 60 Mc (CAS) AT 175 Me For Useas an RF Power Anpl ifier andOsci lator as well asan AFPower Amplifier andNodulator Under Severe Shock and Vibration Conditions GENERAL DATA Electrical: Heater, for Unipotential Cathode: Transconductance, for plate volts = 200, grid-Ko.2 volts =.200, and Mu-Factor, Grid No.2 to Grid No.1 for plate volts = 200, grid-No. 2 Direct Interelectrode Capacitances:® Grid No.1 to cathode & grid No.3 & internal shield, grid No.2, Plate to cathode & grid No.3 & internal shield, grid No.2, Mechanical: Operating Position... 2 ee ee ee ee Any Maximum Overall Length... 2222222210 “sta3si6" Seated Length. 2... 22D LD Rave 178" Maximum Diameter, 6 6 6. ee ee ee ee eee 1 2N/32" Weight (Approx) DTI DL goz Cae DD 11D Sand (vepee’no.c1-1) Socket. 2.2.2 2 2 D1 1 1 standard Octal @-Contact Base. . + Small Micanol-Wafer Octal 8-Pin with "770" Sleeve (JEDEC Group 1, No. B8-150) Pin 1-Cathode, ay Dae Pin 5—Grid No.1 Grid No.3, XK @ Pin 6 -Sane as Internal Pin i Shield al /} Pin 7 Heater Pin 2-Heater Pin 8-Base Pin 3 -Grid No.2 TWO ~« Sleeve Pin 4—Same as r@ Cap ~Plate Pin 1 AA-=PLANE oF ELectRocEs RADIO CORPORATION OF AMERICA Dara | Electron Tube Division Harrison, WJ. 7-63

AF POWER AMPLIFIER & MODULATOR — Class AB,” Maximum Ratings, Absolute-Haximun Values: ces® Icas* PEAK NEATER-CATHODE VOLTAGE: Heater negative with Heater positive with BULB TEMPERATURE (At hottest Typical CCS Push-Pull Operation: Values are for 2 tubes OC Grid-No. 1 Vol tage: Peak AF Grid-No. 1-to-Grid-No.1 Voltage’... 2 se ee es 80 BO wollts Zero-Signal OC Piate Current... 63 57 6 ma Max.-Signal DC Plate Current... 228 215 200 ma Zero-Signal OC Grid-No.2 Current. ee eee ee ee 25 2 1 ma Max.-Signal DC Grid-No. 2 Current. se. ee eee ees BH OB OB ma Effective Load Resistance Max.-Signal Driving Power (Approx.}.. +. 2 0 0 0 watts Max.-Signal Power Output (hpproxe) oe ee ee es 5570 82 watts Typical ICAS Push~Pull Operation: Values are for 2 tubes OC Plate Voltage. pe ee e+ + + 600 750 volts DC Grid-No.2 Voltagef'. we ee ee 200 195 volts OC Grid-No. 1 Vol tage: ° Peak AF Grid-No.1-to-Grid-No.1 Voltage? . 100-100 volts Effective Load Resistance Max.-Signal Driving Power (Approx) . + + 0 0 watts a RADIO CORPORATION OF AMERICA ‘tectron Tube Division Hartson, NJ.

Maximum Circuit Values (CCS or 1CAS): Grid-No. 1-Circuit Resistance under any condition:h3 With fixed bias... ee ee ee Od max. megohim AF POWER AMPLIFIER & MODULATOR — Class AB)> Triode Connection—Grid No.2 Connected to Plate ccs Teas Maximum Ratings, Absolute-Naximum Values: MAX.-SIGNAL DC PLATE CURRENT® © G0 max. 90 max. ma PEAK HEATER-CATHODE VOLTAGE: Heater negative with Heater positive with BULB TEMPERATURE {At hottest Typical Push-Pull Operation: Values are for 2 tubes Peak AF Grid-No. 1-to-Gr id-No. 1 VoltageS. 100 200 200 volts Zero-Signal OC Plate Current. | 120 40 40 ma Max.-Signal OC Plate Current. . 125 100 100 ma Effective Load Resistance Max.-Signal Driving Power (Approx)... ee eee 8 0 0 watts Max.-Signal Power Output (Approx) oe eee eee WO 22 22 watts Maximum Circuit Values (CCS or ICAS): Grid-No.i-Circuit Resistance under any condition: With cathode bias. 2.) 2. 2 22 22015 max. megohm AF POWER AMPLIFIER & MODULATOR — Class AB)" Maximum Ratings, Absolute-axinum Values ces TCAs OC GRID-No.2 VOLTAGE. «© 250 max. 250 max. vol ts MAX.-SIGNAL DC PLATE CURRENT® . 125 max. 135 max. ma RADIO CORPORATION OF AMERICA DATA 2 Electron Tube Division Harrison, NJ. 7-65

PEAK-HEATER-CATHODE VOLTAGE: Heater negative with Heater positive’ with BULB TEMPERATURE (AT hottest Typical CCS Push-Pull Operation: Values are for 2 tubes OC Grid-No.1 Voltage: From fixed-bias source... . -1 -44 84 — volts Peak AF Grid-No.1-to-Grid-No.1 Zero-Signal OC Plate Current. . 33-2722 ma Max.-Signal OC Plate Current. . 232 © 242-207 ma Zero-Signal DC Grid-No.2 Current. 2. 2 ee eee ee AD 0.7 0.6 ma Max.-Signal DC Grid-No. 2 Current... eee ee ee 18 18 17 ma Max.-Signal OC Grid-No. 1 Current... eee eee ee 16 1.9 11 ma Effective Load Resistance Max.-Signal Driving Power Max.-Signal Power Output (Approx.).. e+. ee ees 62 8B watts Typical 1CAS Push-Pull Operation: Values are for 2 tubes OC Grid-No.2 Voltagef 2 2 2 2. ee 190 165 volts OC Grid-No.1 Voltage: Peak AF Grid-No.1-to-Grid-No.1 Voltage. 109 108 volts Effective Load Resistance (Plate to plate)... ee ee eee 5000 7400 ohms Max.-Signal Power Output (Approx.J. . 113° 131 watts Maximum Circuit Values (CCS or ICAS): Grid-No. 1-Circuit Resistance: RADIO CORPORATION OF AMERICA Electron Tube Division Harrison, WJ.

PLATE-MODULATED RF POWER AMPLIFIER — Class C Telephony Carrier conditions per tube for use with amaximum modulation factor of 1 ces TCAS Maximum Ratings, Absolute-Naximum Values: PLATE INPUT oo ee ee ee a5 max. 67.5 max. watts GRID-No.2 INPUT 2 22 2 2 2 max. 2 max. watts PEAK HEATER-CATHODE VOLTAGE: Heater negative with Heater positive with BULB TENPERATURE (At hottest Typical Operation: At frequencies up to 60 Ke . DC Grid-No. 2 Vol tage: From a grid-No.2 series re- sistor of: 33000 ohms... ee. 10 - - vol ts $1000 ohms. 22.2 2] = 138 - vol ts 56000 ohms. 150 volts 0C Grid-No. 1 Vol tage:® From a grid-No. 1 resistor of Peak RF Grid-No.1 Voltage: 2. 107 95 107 volts Power Output (Approx)... . 32 34 52 watts Maximum Circuit Values (CCS or ICAS): RF POWER AMPLIFIER & OSCILLATOR — Class C Telegraphy* and RF POWER AMPLIFIER — Class C FM Telephony ces ICAS Maximum Ratings, Adsolute-Naximum Values: Ge RADIO CORPORATION OF AMERICA DATA 3 Electron Tube Division Harrison, M. J. 1-63

PLATE INPUT. we eee ee ee 67.5 max. 90 max. watts GRID-No.2 INPUT. 2 2 2 ee Bmax, 3 max. watts PLATE DISSIPATION. . ww ww 20 max. 25 max, watts PEAK REATER-CATHODE, VOLTAGE: Heater negative with Heater positive with BULB TEMPERATURE (At hottest Typical Operation: As amplifier up to 60 Me OC Grid-No.2 Voltage:t. 2. From a grid-No.2 series resistor of: 36000 ohms. ee ee ATO = - - volts $1000 ohms. |. ee = 150 = = volts 43000 ohms. 2 2 ee ee ee - 180 - volts 56000 ohms. ©. ee ee ee - = 160 volts DC Grid-No. 1 Voltage: 4 From a grid-No.1 resistor of: 27000 ohms. 2 vee ee 66M - =. volts 20000 ohms. 22 2 = 58 = 62 volts, 24000 ohms. 2 2 ee id - -71 = volts From a cathode resistor of: 430 oWms. . ee ee tT TL = volts A410 ohms. wwe ee ee ee 66 HSB - 62 volts Peak-RF Grid-No.1 Voltage... 84 73 91 79 volts Typical Operation: As anplifier up to 175 Me OC Grid-No. 2 Voltaget 5. From grid-No.2 series resistor of: 43000 ohms... 2 ee 180 = volts 20000 ohms... 2 we eee - 190 volts 0C Grid-No. 1 Vol tage:* From a grid-No.1 resistor of: 27000 ohms. © ww ee ee -51 - volts 24000 ors. SH -84 volts From a cathode resistor of: 330 ohms... ee ee ee SD -54 volts Peak RF Grid-No.1 Voltage . . . 64 68 volts OC Grid-No. 1 Current (Approx. ). 2 2.2 ma ee RADIO CORPORATION OF AMERICA Electron Tube Division Harrison, WN. J.

Driving Power (Approx.) ss... ese 3 3 watts Maximum Circuit Values (CCS or ICAS): * vitnout external shieié. © surscript 1 Indicates that grié-No.t current does not flow during any Bart of tne Input cycles © continuous comercial Service. 4 Intermittent Comercial and amateur Service. © averaged over any audio-trequency cycle of sineiwave form, f obtained preterabiy trom a separate source or trom the plate-voltage Supply with a vol tage Stvigers 8 the driver stage should be capable of supplying the Nox grids of the ass" AEy" stage’with the spec! tied driving vollage at iow'distort ions * the typerof, input coupling netnork used should not introduce too much Fesistence in "the gFideyont circuit. Transformer or impedance coupt lag devices are recommended. J nen the 6isgw/7212 is operated as a beam power tube in Class AB, ser~ vice, only fixed bias should be used, and the de grid-Ko.i-circutt re- Sistince Snoulé never exzeed the specified valve of 0.1 megonm. K amon the 61x6w/7212 is connected as trioge and its grid no.1 is oper NGG with’ ther fixed vias, the ae grideno.ivelreult resistance should fever" exceed. the specified valve 8f 0.1 megohm, it higher vslues of Grid-woviccircuit ‘resistance are desired, "cathode Dias aust De employ= 24," Under no circumstances. shovld the dé gridsno.i-eireult resistance exceed the specified value of 0.3 megone, ™ suoscript 2 indicates that grid-vo.2 current Tlows during sone part of the input cycle. ” driver, stage should be capable of supplying the specified driving pom grat low Sistortion tothe Nout grids of ‘the abe stages Tovmisial ze istortitn, ine effective reatatance per grid-tofs chfcuit ot" the aby Stage shovid be neld at a tow values For this purpose, the use o! Eranstormer ‘coupling is recomended." In ho case, however, ‘should the Eotal ‘degrideno. iecircuit resistance exceed 3006 ohas when the Sineu/ 7212's operateg at naxinon ratings. For operation at Teas than maximum ratings, the dc grid-No-i-ci reult resistance may be at high as 100000 "ohms. optained preterapiy fron a separate source modulated along with the Plater supply. or from the modulated plate supply through « series 4 obtained from grig-to.4 resistor or trom a combination of grideto.t re- sTetor‘with°eirer fixed’ supply of cathode restators , man orig nowt, is driven positive and the ¢1s6w/7212 {8 operated at max- inom Pat ings: the total oe gridctoricelrcult resistance. snouta not exe ceed the Specified value of 30000 ohms. If this value is insufficient {e"provide adequate Dias, the sag it Tonal Fequired bias must be supp! ted by A’ cathode resistor of a’fixed supply. “For operation at less than ‘maximum ratings, the de grid-Nori-eireuli resistance may be as high as 706000" ohns. . ; Hey-down conditions per tude without amplitude nodulation. Amplitude sodatat fon Caaent ah fy "saga ive may be waed WF the positive peak at the Suajentrequency envelope does nat exceed 118 per cent of the carrie? t Obtained preferably trom separate source, or fron the plate-supply vol t~ Soeneith W woh tage div téery Sraphravan a ae ies ration. a auclaa FlaTno2 resister should be used only when tne ivew/7222 is used. In Sreheeuld welch 1a hot eyed,” orideno.? voltege most sot exceed 400 Volts under hey-up Condit tons, obtained trom tixed supply, by -grid-no.t resistor, by cathode resistor, ori by Combination metnogse” 7 © ” RADIO CORPORATION OF AMERICA DATA 4 Electron Tube Division Harrison, NJ. 1-63

CHARACTERISTICS RANGE VALUES: Note Min. Max. Direct Interelectrode Capaci tances: Grid No.1 to cathode & grid No.3 & internal shield, grid No.2, base sleeve and Reater. 0 eve ee ee 2 12.0 15.0 of Plate to cathode & grid No.3 & internal shield, grid No.2, base sleeve, and heater. 2 2-2 ee ee ee 2 7.3 9.5 of Plate Current. 2.2 eee 3 % 9a ma Heater-Cathode Leakage Current: Heater 100 volts negative with respect to cathode. . 1 - 100 a Heater 100 volts positive with respect to cathode. . 1 - 100 my Useful Power Output... 4 47 = watts Mu-Factor, Grid No.1 to Grid No.2. ee ee ee ee 5 3.6 5.4 Note 1: with 6.9 volts € on neater. hote 2: without external shield. note 3: Wht 08 ad ae artecaocavoftats 5gr * 200 Oe ari tee? tote 4: Ina single-tude, selt-excited oscillator circuit, and with 6.3 Werte acton heaters ce plate volte = 600, de grig-now? volts’ = Yeo “griacnord resi stor’ (ohms) = 30,000" 108, devpiatema. = 100° 8 Utne qriacacsz mes 2 73 maeimun, ae" gridenoed mas = pto'S.8 and Frequency “(uel 18. Note 5: With 6.2 volts ac on heater, de plate volts = 209, plate ma. = Yoo? $48 rtcnaca’velts = boo. ‘SPECIAL RATINGS & PERFORMANCE DATA 600-9 Shock Rating: This test 1s performed on a sample lot of tubes from each production run. Tubes are ‘Neld rigid and are subjected in four different positions to an impact acceleration of 500 9. At the end of this test, tubes are required to meet the fol low- ing limits: For conditions shown under Characteristics Range Values, Note 4. . Heater-Cathode Leakage Current . . . . -See Characteristics Range Values The tubes must also meet the established limit for low-fre- quency vibration (See below). Fatigue Rating: This test is performed on a sample lot of tudes from each production run. Tubes are rigidly mounted and subjected to 2.5-g vibrational acceleration at 25 cycles per second for 32 RADIO CORPORATION OF AMERICA Electron Tube Division Harrison, N. J.

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