Y1641
The Y1641 (P/N 154-0506-00,154-0510-00) is an SHF cermet triode vacuum tube that appears to have been a Tektronix-spec'd version of the GE 7077, which is described as
a high-mu-triode of ceramic and metal planar construction primarily intended for use as an r-f amplifier in the UHF range. It features an extremely low noise figure throughout its frequency range. The 7077 is especially suited for use where unfavorable conditions of mechanical shock, mechanical vibration, and nuclear radiation are encountered.
The 7077 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.
Part number 154-0510-00 seems to have been a version selected for high frequency.
The Y1641 was used in the 1st LO of the 1L40 (V42, 1.7 to 4.2 GHz), in early versions of the 491. In addition, from ca. 1967 on, it replaced the earlier models' Y1506 tubes in the 1st LOs of the 1L20 (V40, 210-475 MHz, and V41, 475-1100 MHz).
Some instruments using part Y1641
| Instrument | Manufacturer | Class | Description | Introduced |
|---|---|---|---|---|
| 1L20 | Tektronix | Plug-in | 4.2 GHz Spectrum Analyzer plug-in | 1965 |
| 1L40 | Tektronix | Plug-in | 40 GHz Spectrum Analyzer plug-in | 1968 |
| 491 | Tektronix | Spectrum Analyzer | 40 GHz Spectrum Analyzer | 1966 |
Links
- Y1641 @ radiomuseum.org
- 7077 @ radiomuseum.org
- GE 7077 data sheet
- GE7077 @ The Valve Museum
- GE Essential Characteristics Handbook, 14th Ed., 1973
Pictures
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GE 16411
-
mechanical drawing from 050-0348-00.pdf
