Radio Broadcast (May 1928-Apr 1929)

"Radio Broadcast V Directory of Vacuum Tubes '"THE 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. 5' AVERAGE CHARACTERISTICS OF RADIO VACUUM TUBES GENERAL DETECTION AMPLIFICATION MODEL USE CIRCUIT REQUIREMENTS INTER-ELECTRODE CAPACITIES IN MMFD. FILAMENT COLD "a" SUPPLY FILAMENT TERMINAL VOLTAGE FILAMENT CURRENT (AMPERES) DETECTOR GRID RETURN LEAD TO GRID LEAK MEGOHMS DETECTOR B' BATTERY VULTAGL DETECTOR PLATE CURR'T MILLIAMPERES) AMPLIFIER rB" BATTERY VOLTAGE AMPLIFIER 'C" BATTERY VOLTAGE AMPLIFIER PLATE CURRENT (MILLIAMPERES A.C.PLATE RESISTANCE (OHMS) MUTUAL CONDUCTANCE MICROMHOS VOLTAGE AMPLIFI'TON FACTOR MAXIMUM UNOISIORTED OUTPUT (MILLIWATTS) C-11 WO-1 1 Sam ! as bel 3w, except for base which i old UV tyf ! CX-12 WX-12 Detector or Amplifier Transformer Coupling G-F6; G-P5.5; P-F7.5 Dry Cell li V Storage 2 V 1.1 .25 + F 3 to 5' 22ito45 1.5 90 135 4>/2 10fe 2.5 3.5 15,500 15,000 425 440 6.6 6.6 7 35 CX-1 1 2 A UX-112A Detector or \ Amplifier Transformer . Coupling G-F9; 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 3 3 30 120 C-299 UV-199 Sam e as be dw, except for base , which i l old UV ty| a CX-299 UX-199 Detector or Amplifier Transformer Coupling G-F3.6; G-P 3.5; P-F4.5 Dry Cell 42 V. Storage 4 V. 3.0 3.3 .060 .063 + F 2 to 9 45 1 90 2.5 15,500 425 6.6 7 CX-300A UX-200A Detector Transf. 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 i 45 1.5 Following apply onl> JX-200 A c for Detect wacteristics or connection 30,000 666 20 CX-301 A U X -20 1 A Detector or Amplifier Transformer 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 \h 2.5 11,000 1 0,000 725 800 8 15 55 CX-322 UX-222 Radio Freq. | Amplifier Special Shielding G-P 0.025 Dry Cell 45 V. SI0.3ge4 6V 3.3 .132 — — — — 135 li# 1.5 850.000 350 300 „ CX-322 UX-222 Audio Freq. f Amplifier Coupling Dry Cell 42 V. Storage 4-6 V. 3.3 .132 180 { 15° .3 150,000 400 60 UX-226 CX-326 Amplifier Type Transformer Coupling Transformer 1.5 V. 1.5 1.05 90 180 6 13| 3.5 7:5 9,400 7^000 8ioo 1,170 8.2 8.2 20 70 160 C-327 UY-227 Detector A. C HeaterType Transformer Coupling G F 3.6' G-P 3.7" P-F 2 75 Transformer 2.5 V. 2.5h 1.75 2-9 45 90 2 7 Followin ■ apply onl g UY-227 c y for Detec haracteristics or connection 10,000 8,000 800 1,000 8 8 CX-340 UX-240 Detector or Amplifier Resistance Coupling GF3.4; G-P 8.8; P-F 1.5 Storage 6 V. 5.6 .25 + F 2 to 5 135 { 180 f •0.3 04 135 1 180 f ii 3 .2 .2 150.000 150,000 200 200 30 30 — CX-1 12 A UX-112A k Power Amplifier No LS.C. Required G-F 9; G-Pll; P-F7.5 Storages V. Transformer SV. 5.0 .25 — — — — 135, 1575 9 16J 7 9.5 5,000 4,700 1.600 1,700 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 4 |V. Storage 4 V. 3.0 3.3 .125 .132 135 22^ 6.5 6,300 525 3.3 110 CX-371 A UX-171 A Power Amplifier LS.C. except at 90V. G-F 6.8; G-P 9.5; P-F 6.5 Storage 6 V. Transformer 5 V. 5.0 .25 90 135 180 16, 27 1 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 31$ 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 . 2S0 300 ■350 400 450 45 it 70 84 28 21 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 RACr rERL 3TICS OF V fESTE RN EL ECTRI C TUI 5ES V 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 1.0 20,000 300 6 8 102D Amplifier Resis. or Impedance Coupling 2.0 0.97 130 1.5 0.75 60,000 500 30 4.2 "C 216 A 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-F8.2.G-P3.46^P-F80 4-5 1.0 130 22.5 20.0 2,200 I.IOO 2.4 145 "E" 205 D 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 Rectification in Eliminators Filament Terminal Voltage.. 5 Volts \ Filament Current. _ 2 Amperes !R M 5 A.C.Plate Voltage 300 Volts I (Max-per Plate) ' Filament Terminal Voltage. .7.5 Volts Filament Current 1.25 Amperes }■ R M S A.C.Plate Voltage.. .750 Volts (Maximum) Designed to keep output voltage of B Power Units constant when different values of B°current are supplied Designed to insure constant input to power operated radio receivers despite fluctuations in line voltage Max.D.C. Output Current (both Plates) 125 Milliamperes 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 Circuit Large Standard UX Base Rectification in Eliminators Recommended Maximum. A.C. Plate Voltage 650. . 750 Volts D.C. Output Current 65.. 110 Milliamperes D.C. Output Voltage as applied to filter of typical rectifier circuit -.620. .620 Volts CX-374 UX-874 Voltage Regulator Large Standard UX Base Constant Voltage Device Operating Voltage. 90 Volts D.C. Starting Voltage 125 Volts D.C. Operating Current 10-50 Milliamperes C-376 UX-876 Current Regulator (Ballast Tube) Transformer Primary of 65 Volts for use on 115 Volt Line Standard Mogul Type 2ft Constant Current Device Operating Current 1.7 Amperes Mean Voltage Drop 50 Volts Permissible Variation ilO Volts C-386 UX-886 Current Regulatoi (Ballast Tube) Transformei Primary of 65 Volts for use on 115 Volt Lin 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 + 10 Volts C-377 Protective Tube Double & Contact Bayonet Auto.Type Current Limiting Device Used tn"B'PBattery circuits to prevent excessive current resulting from short-circuit which might damage tubes or wiring Voltage Drop Across 45 90 t (() Note other use of this Radiotron above/below) * InnerGrid -V/2 Volts; Outer Grid+45 Volts, 0.15 Milliamperes 0 Outer Grid -V/2 VoltS; Inner Grid+2 2V2 Volts, 6 Milliamperes 1 Applied thru plate coupling resistance of 250,000 Ohms c. Connection to shell of base for third terminal which is the lead to mid-point of filament Note : All grid voltages are giver with respect to cathode c negative filament termin Maximum values not to Except for half ampere filament, UX-1 12 and UX-171 characteristics are identical respectively to UX-112-A and UX-171-A. K Cathode H HeaterVoltage LS C.Loud Speaker Coupling.consisting of either Choke Coil and By-Pass Condenser or Output Transformer of M orstep down ratio, recommended wherever plate current (D-C-)exceeds 10 milliamperes. M With a screen grid tube, on accountof circuit limitations.ihe actual voltage amplification obtainable does not bear as high a relation to the voltage amplification factor as in the case of three element tubes. I07