Radio Broadcast (May 1928-Apr 1929)

Radio Broadcast's" Directory of Vacuum Tube; 'T'HE table below is as complete as is possible to make it and should be a constantly useful reference for all radio workers. The data on some Western Electric tubes are included because some of our readers live in Canada and in other countries where tubes of this manufacture are available. We have followed the RCA-Cunningham tube terminology; other manufacturers make types of tube similar in each class, although each manufacturer has his own terminology. The reader who desires to use a CeCo tube for example, need only ask his dealer or the manufacturer for a CeCo of the 201-A type, etc. The same follows naturally for any of the vacuum tubes in the classifications below made by Arcturus, Sovereign, Sylvania, Marathon, Gold Seal, Sonatron, Kellogg, Magnetron, Speed, and others. E J" AVERAGE CHARACTERISTICS OF RADIO VACUUM TUBES GENERAL DETECTION AMPLIFICATION MODEL USE CIRCUIT REQUIREMENTS inter-electrode capacities in mmfd. filament cold "a" SUPPLY FILAMENT TERMINAL V 0 L T At L FILAMENT CURRENT (AMPERES) DETECTOR GRID RETURN LEAD TO GRID LEAK MEGOHMS DETECTOR B' BATTERY VOLTAGE DETECTOR PLATE CURR'T WILLIAMPERES) AMPLIFIER rB" BATTERY VOLTAGE AMPLIFIER 'C BATTERY VOLTAGE AMPLIFIER PLATE CURRENT (MILLIAMPERES) A.C.PLATE RESISTANCE (OHMS) MUTUAL CONDUCTANCE MICR0MHOS VOLTAGE AMPLIFI'TON FACTOR MAXIMUM UNDISTORIED OUTPUT (MILLIWATTS) C-11 WD-1 1 Sam jw, except old UV typ CX-12 WX-12 Detector or Transformer G F6.G-P5.5. P-F7.5 DryCellliv Storage 2 V 1.1 .25 *F 3 to 5 22 \ to 45 1.5 90 2.5 15.500 15.000 425 440 6.6 6.6 7 35 CX-112A UX-1 1 2 A Detector or 1 Amplifier Transformer Coupling G F 9, G-P 11: P-F7.5 Storage 6 V 5.0 .25 *F 3 to 5 45 1.5 90 135 5.5 7 5.300 5,000 1,500 1,600 8 8 30 120 C-299 UV-199 Sam e as be 3W, except tor basr , which i : old UV ty! a CX-299 UX-199 Detector or Amplifier Transformer Coupling G-F3.6, G-P 3 5; P-F4.5 Dry Ceinjv Storage^ V 3.0 3 3 .060 .063 + F 2 to 9 45 1 90 4 i 2 5 15.500 425 6.6 7 CX-300A UX-200A Detector Tfanst. or Resis Coupling G-F 3.4; G-P 8-8; P-F 1.5 Storage 6 V 5.0 .25 F 2 to 3 • 45 1.5 Following apply onl) JX-200 A c for Detect laracteristics or connection 30.000 666 20 UX-201 A Detector or Amplifier Coupling G-F5.8; G-P 10.1; P-F 6.1 Storage 6 V 5.0 .25 + F 2 to 9 45 1.5 90 135 4 2 9 3 1 1.000 10.000 725 800 8 8 15 55 CX-322 UX-222 Radio Freq. $ Amplifier Special Shielding G-P 0.025 Dry Cell aiv Storage 4-6 V 3.3 .132 135 li* 1.5 850.000 350 300 M CX-322 UX-222 Audio Freq. J Amplifier Resistance Coupling Dry Cell 41 V. Storage 4-6 V. 3.3 .132 — — 180 f li° .3 150.000 400 60 — UX-226 CX-326 Amplifier A.CFilament Type Transformer Coupling G-F 3-65, G-P 8.2; P-F2.1 Transformer 1.5V. 1.5 1.05 — — — 135 180 9 13| 3.5 6 7.5 9,400 7,400 7.000 875 1,100 1.170 8.2 8.2 8.2 20 70 160 C-327 UY-227 Detector A. C Heater Type Transformer Coup mg G-F 3.6; G-P 3.7; P-F 2.75 Transformer 2.5 V. 2.5H 1.75 K 2-9 I-1 45 90 2 7 Followin applyonl gUY-227c y tor Detec haracteristics or connection 10.000 8,000 800 1.000 3 8 CX-340 UX-240 Detector or Amplifier Resistance Coupling G-F 3.4' G-P 8 8 P-F 1 5 Storage 6 V 5.6 .25 + F 2 to 5 135 { 180 ? •0.3 04 135 1 180 J ii 3 .2 .2 150,000 150.000 200 200 30 30 CX-112A UX-1 12 A 1 Power Amplifier No LS.C. Required G-F 9; G-P 11; P-F 7.5 Storage 6 V. Transformer SV. 5.0 .25 157i 9 10* 7 9.5 5.000 4.700 1.600 1700 8 8 120 195 CX-220 UX-120 Power Amplifier No L.S.C. Required G-F 4.5; G-P 5.4; P-F 4.4 Dry Cell 4jV. Storage 4 V 3.0 3.3 .125 .132 135 22-J 6.5 6.300 525 3.3 110 CX-371 A UX-1 7 1 A Power Amplifier LS.C. except at 90V G-F 6.8; G-P 9.5: P-F 6.5 Sloiage6V Transformer 5 V. 5.0 .25 90 135 180 I6j 40 } 10 16 20 2,500 2,200 2.000 1,200 1.360 1,500 3 0 3.0 3 0 130 330 700 CX-310 UX-210 Power Amplifier LS.C. G-F 7, G-P 8; P-F 7 Transformer 7.5 V. 7.5 1.25 250 300 350 400 425 18, 22 i 3li 35^ 10 13 16 18 18 6.000 5,600 m 5,000 1.330 1.450 1.550 1.600 1.600 8 8 8 8 8 340 600 925 1.325 1.540 CX-350 UX-250 Power Amplifier LS.C. G-P 8.7 Transformer 7.5 V. 7.5 1.25 250 300 350 400 450 45 u 70 84 28 11 55 55 2.100 2.000 1.900 1.800 1.800 1.800 1.900 2.000 2.100 2.100 3.8 3 8 3.8 3 8 3 8 900 1.500 2,350 3,250 4.650 AVERAGI : CHA RAC rERi 3TICS OF \ fESTE RN EL ECTRI C TUI ,ES "N" 215-A Detector or Amplifier Transformer Coupling G-F 4.4, G-P 6; P-F 3.8 1.0 0.25 » +F 2-9 45 1.0 67 6.0 10 20,000 30O 6 8 102 0 Amplifier Resis. or Impedance Coupling 2 0 0.97 130 1.5 0.75 60.000 500 30 4.2 "L" 216A Amplifier Transformer Coupling 5-6 1.0 130 9.0 8.0 6,000 980 5.9 60 "0" 104 D Power Amplifier Transformer or imped. Coupling G-Fg.2,G-P3.46;P-F8£l 4-5 io 130 22.5 2O.0 2,200 I.I 00 2.4 145 "E" 205 0 Power Amplifier Transformer or Imped. Coupling 4.5 1.6 350 22.5 33 3.500 2.000 7 890 SPECIAL PURPOSE TUBES CIRCUIT REQUIREMENTS MAXIMUM OVERALL HEIGHT MAXIMUM OVERALL DIAMETER CHARACTERISTICS CX-380 UX-280 Full-Wave Rectifier Full-Wave Circuit Large Standard UX Base Reclilication ir Eliminators Filament Terminal Voltage.. 5 Volts Filament Current 2 AmperesrR M g A.C.Plate Voltage _ 300 Volts j (Max.per Plate) ' 5 R.I Max.D.C. Output Current (both Plates) 125 Millian D.C. Output voltage at Max. Current as applied to filter of typical rectifier circuit 260 Volts CX-381 UX-281 Half-Wave Rectifier Half or Full Wave Circui Large Standard UX Base Rectification in Eliminators Filament Terminal Voltage. .7. 5 Volts Filament Current 1.25 Amperes A.C.Plate Voltage.. _.750 Volts (Maximum) R.M.S. Recommended Maximum A C. Plate Voltage 650.. 750 Volts D C. Output Current 65.. 110 Mill.am DC. Output Voltage as applied to filter of typical rectifiercircuH..62Q. .620 Volts CX-374 UX-874 Voltage Regulator Large Standard UX Base Constant Voltage Designed to keep output voltage of 8 Power Units constant when different values orBncurrent are supplied Operating Voltage 90 Volts D.C. Starting Voltage _ 125 Volts D.C. Operating Current 10-50 Milliamperes C-376 UX-876 Current Regulato: (Ballast Tube) Transformer Primary of 65 Volts lor use on 115 Volt Line Standard Mogul Type Screw Base Constant Current Device Designed to insure constant input to power operated radio receivers despite fluctuations in line voltage Operating Current 1.7 Amperes Mean Voltage Drop 50 Volts Permissible Variation ilO Volts C-386 UX-886 Current Regulatoi (Ballast Tube) Transtorme Primary of 65 Volts for use on 115VoltLine Standard Mogul Type Screw Base Constant Current Device Designed to insure constant input to power operated radio receivers despite fluctuations in line voltage Operating Current 2.05 Amperes Mean Voltage Drop 50 Volts Permissible Variation ;io Volts Used incB"Banery circuits to prevent excessive current resulting trom short-circuit which might damage tubes or wiring C-377 Protective Tube Double a Contact Bayonet Auto-Type Voltage Drop Across Entire Filament nenl 5 At 20 Milhamperes D.C 90 At90MiHiamnpr«»<; D.C ;sD C t Ul Note other use of this Radiotron above(beiow) a InnerGrid -l'/2 Volts-, Outer Gnd+45 Volts, 0.15 Milliamperes □ Outer Grid Voltss Inner Grid+22'/2 Volts, 6 Milliamperes $ Applied thru plate coupling resistance of 250,000 Ohms A Connection to shell of base for third terminal which isthelead to mid-point of filament Note : All grid voltages are given with respect to cathode or negative filament terminal Maximum values nottO be exceeded Except for half ampere filament. UX-1 12 and UX-1 7 1 characteristics are identical respectively to UX-112-A and UX-171-A. K ....Cathode H Heater Voltage LS C.Loud Speaker Coupling.consisting of either Choke Coil and By Pass Condenser or Output Transformer of !•] orstepdown ratio.recommended wherever plate current (D-Oexceeds 10 milliamperes. M With a screen-grid tube. on accountof circuit limitations.rhe actual voltage amplification obtainable does not bear as high a relation to the voltage amplification (actor as in the case of three element tubes. 300