Antique radios, Old Time Radios
6HA7
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| Tube type: |
Double Pentode |
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| Identical to |
6HA7
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| Similar
Tubes |
Differences not known by us:
6BU8
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| Base |
Noval, 9 pin miniature (USA pico-9) B9A
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 6.3 Volts / Indirect |
| Description |
A twin pentode with sharp cut-off characteristics, developed for use in TV receivers, where one section is for AGC and the other for sync separation.
The cathode, control grid and screen grid are common to both the sections. The control grid serves as the noise gate for both the circuits.
However, there are two suppressor grids and two plates to separate sync output from one pentode and AGC voltage from the other.
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Just Qvigstad
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[rmxtube-en]
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