| 1. EARLY
TYPES |
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| Family / Thumbnail |
Type |
Description |
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56 |
Triode amplifier |
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215A |
Triode amplifier, peanut |
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1876 |
Rectifier, vacuum |
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3184 |
Neon glow tuning indicator |
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A441 |
Bigrid amplifier, early
'Miniwatt' |
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Audiotron |
Very early triode, Cunningham |
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ACT6 / VT25
/ CV1025 |
Transmitting triode, external
anode |
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AT50 |
Early transmitting triode |
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ATS70 /
CV1365 |
Transmitting tetrode |
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B_Raytheon |
Gas-filled rectifier |
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BA_Raytheon |
Gas-filled rectifier |
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BH_Raytheon |
Gas-filled rectifier |
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C-100A |
Collins-Amperex oscillator.
Quite late but made to a 1915 patent. |
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CG-1162 / VT-14 |
Early transmitting triode, 1918 |
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CX-301-A |
Early triode amplifier,
Cunningham |
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D-79510 |
Ionization vacuum sensor |
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D-79512 |
Ionization vacuum sensor |
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D-II
Philips |
Early triode, about 1921 |
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DV2_ZENITH |
Early triode amplifier |
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HR-406 |
Early triode |
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Kellog-Type
20 |
Early AC Power Triode |
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Kellog-401 |
Early AC Triode |
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KL71403 |
Triode, power audio amplifier |
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KL75303 |
Equiv. to RGN1404 |
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L424 |
Triode = RE084, Zenith |
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Micro Bigrille - OC. |
Early tetrode, mixer |
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MR1 |
Diode rectifier HV |
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N30 |
Catkin tube |
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NU13A /
CV1266 |
Rectifier, L4 base |
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R22 |
Gas-filled rectifier |
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RE58 |
Early triode, equiv. UV201 |
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RE134 |
Power triode, audio amplifier |
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RR145V |
Neon glow tuning indicator |
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RS19 VII |
150 W early transmitting triode,
Telefunken 1919 |
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SG-210 |
Screen grid HF amplifier, Cossor |
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TB1 |
Diode rectifier |
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TM15 |
French power triode |
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TP4100 |
Power pentode, Zenith Monza |
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TRS3 |
Triode |
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U15 |
Rectifier, vacuum L4 base |
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UV199 |
Triode amplifier |
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UV201 |
Very early triode, RCA and
others |
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V99 |
Triode amplifier, similar to
UV199 |
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VT-1 |
Early triode, WWI |
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VT-2 |
Very early transmitting triode |
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VT13C |
Early transmitting triode |
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VT25 /
DET25 / CV1025 |
Transmitting triode, L4 base |
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VT30 /
10E8738/ CV1030 |
Early transmitting triode, 1922 |
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VT31 |
Transmitting tetrode |
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WD12 |
Triode amplifier |
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