Y1641
The Y1641 (P/N 154-0506-00,154-0510-00) is an SHF cermet triode vacuum tube used in the 1L20 oscillators (2×) and early versions of the 491.
It appears to have been a Tektronix-spec'd version of the GE 7077, which is described as a ceramic-metal small-size planar triode for use as a low-noise amplifier for frequencies up to 7.5 GHz, and was used in the final 960 MHz amplifier stage (0.1 W output) in the Pioneer 3 / Pioneer 4 space probes.
According to KI3U's article Substitute UHF Oscillator Tubes for the Tektronix 1L20 Spectrum Analyzer Plug-in, the 7077 has higher heater power requirements - the 1L20 needs to be modified to accommodate 7077s.
The 154-0510-00 seems to have been a version selected for high frequency.
Links
- Y1641 @ radiomuseum.org
- 7077 @ radiomuseum.org
- GE 7077 data sheet
- GE7077 @ The Valve Museum
- GE Essential Characteristics Handbook, 14th Ed., 1973
Some instruments using part Y1641
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 1L20 | Tektronix | Plug-in | 1L20 | 4.2 GHz Spectrum Analyzer plug-in | 1965 |
| 491 | Tektronix | Spectrum Analyzer | 491 | 40 GHz Spectrum Analyzer | 1966 |
Pictures
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GE 16411
