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[email protected] tabbypurr@gmail.com is offline
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Default Oldtimer question (valves/tubes)

On Sunday, 12 May 2019 14:05:35 UTC+1, Cursitor Doom wrote:
On Sun, 12 May 2019 11:04:06 +0000, Cursitor Doom wrote:

[...]

Sorry, guys, it's a Taylor 68A/M. I can't find the exact model on line
but this one is as close as it gets:

https://www.radiomuseum.org/r/taylor...tor_68a_2.html

The grid/Cathode bias does change with range selection; I just measured
it. There doesn't seem anything obviously amiss with the readings:

Range 8 (lowest frequency) -25V
7: -7V
6: -3.4V
5: -1V
4: -0.3V
3: -1.6V
2: -1.8V
1: -1.0

Anode is +80 to +90VDC vs. Cathode over all ranges.


If you've eliminated other faults as possible then time to adjust the bias on the iffy range.


NT