 |
| Identical to |
1681
|
| Similar
Tubes |
6AQ5 (other class quality (otherw. equal))
|
| First Source
(s) |
1950 : Tube Lore, Sibley, USA 1996
|
| Production stop |
1952 |
|
| Was used by |
Technology / Measurement |
| Filament |
-: Indirect /
-: Parallel, (AC/DC) /
If: 0.45 Ampere /
Vf 6.3 Volts /
|
| Description |
Beam power amp., modified 6AQ5. Had special control grid and tungsten heater wire in place of „Dowmo“. Tested for zero-bias plate current, cutoff, shorts, and life. Sold only to IBM. Intro. 1950; withdrawn 1952. (IBM reportedly got better quality w/ GE and TS tubes.) Tubes were to be etched „6AQ5,“ and branded w/ „IBM“ and probably w/ IBM part no. 300706. [Information by L. Sibley]
|
|
|
|
|
|
ARRL Handbook 1972
Michael Schlör
|
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