6688
The 6688 (European: E180F) (Russian: 6Ж9П) is a miniature high-slope VHF/UHF pentode vacuum tube with a B9A (Noval) miniature 9-pin base, primarily intended "for use in wideband amplifiers in telephone carrier systems, radar equipment and measuring equipment".
It is used in:
- the staircase generator circuit of the 3T77
- the P80 cathode-follower probe
- TR-4602, Hungarian 551 clone
- the 526
Tek part number: 154-0215-00
Links
Pictures
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P80 probe internal view
Some instruments using part 6688
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 3T77 | Tektronix | Plug-in | 3T77 | Sampling sweep plug-in | 1962 |
| 3T77A | Tektronix | Plug-in | 3T77A | Sampling sweep plug-in | 1966 |
| 4S2A | Tektronix | Plug-in | 4S2A | Dual channel sampling plugin | 1965 |
| 526 | Tektronix | Audio/Video | 526 | NTSC Vectorscope | 1959 |
| P80 | Tektronix | Probe | P80 | Active probe for 581/585+80 | 1959 |
| TR-4602 | EMG | Oscilloscope | TR-4602 | 25 MHz dual beam oscilloscope | (?) |