1j42b Valves

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1j42b Valves

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Pat Pending

Rest in Peace

Posts: 218
Location: The suburbs of Hades, Norfolk.

#3

05-10-2016, 07:43 PM

Trevor, have you tried adjusting the filament voltage while using them as a detector? You can often find a sweet spot where they really perform well, when running at reduced (critical) filament voltage. I've found examples of the 6418 hearing aid valve that are good detectors when used as you describe.

Cheers, Andy.

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Messages In This Thread

1j42b Valves - by Murphyv310 - 05-10-2016, 05:50 PM

RE: 1j42b Valves - by Mike Watterson - 05-10-2016, 06:45 PM

RE: 1j42b Valves - by Pat Pending - 05-10-2016, 07:43 PM

RE: 1j42b Valves - by Murphyv310 - 05-10-2016, 07:59 PM

RE: 1j42b Valves - by Mike Watterson - 06-10-2016, 08:04 AM

RE: 1j42b Valves - by Murphyv310 - 06-10-2016, 05:58 PM

RE: 1j42b Valves - by Mike Watterson - 06-10-2016, 06:26 PM

RE: 1j42b Valves - by pwdrive - 06-10-2016, 06:36 PM

RE: 1j42b Valves - by Mike Watterson - 06-10-2016, 06:42 PM

RE: 1j42b Valves - by Murphyv310 - 06-10-2016, 06:54 PM

RE: 1j42b Valves - by pwdrive - 06-10-2016, 06:57 PM

RE: 1j42b Valves - by Mike Watterson - 06-10-2016, 07:18 PM

RE: 1j42b Valves - by Pat Pending - 06-10-2016, 08:48 PM

RE: 1j42b Valves - by Mike Watterson - 06-10-2016, 09:06 PM

RE: 1j42b Valves - by Pat Pending - 06-10-2016, 09:22 PM

RE: 1j42b Valves - by Mike Watterson - 07-10-2016, 09:03 AM

RE: 1j42b Valves - by Pat Pending - 07-10-2016, 05:40 PM

RE: 1j42b Valves - by Murphyv310 - 07-10-2016, 06:51 PM

RE: 1j42b Valves - by Pat Pending - 07-10-2016, 07:17 PM

RE: 1j42b Valves - by Murphyv310 - 07-10-2016, 08:13 PM

RE: 1j42b Valves - by Pat Pending - 07-10-2016, 10:06 PM

RE: 1j42b Valves - by Mike Watterson - 07-10-2016, 07:32 PM

RE: 1j42b Valves - by Mike Watterson - 07-10-2016, 07:35 PM

RE: 1j42b Valves - by Geordie McBoyne - 07-10-2016, 09:19 PM

RE: 1j42b Valves - by Mike Watterson - 07-10-2016, 09:37 PM

RE: 1j42b Valves - by Geordie McBoyne - 07-10-2016, 10:08 PM

RE: 1j42b Valves - by Pat Pending - 07-10-2016, 10:30 PM

RE: 1j42b Valves - by Murphyv310 - 08-10-2016, 07:25 PM

RE: 1j42b Valves - by Terry - 09-10-2016, 12:11 PM

RE: 1j42b Valves - by Murphyv310 - 09-10-2016, 12:51 PM

RE: 1j42b Valves - by Terry - 09-10-2016, 04:23 PM

RE: 1j42b Valves - by Mike Watterson - 08-10-2016, 09:45 PM

RE: 1j42b Valves - by Brianc - 10-10-2016, 05:59 AM

RE: 1j42b Valves - by ppppenguin - 10-10-2016, 07:59 AM

RE: 1j42b Valves - by Murphyv310 - 10-10-2016, 08:43 AM

RE: 1j42b Valves - by ppppenguin - 10-10-2016, 04:50 PM

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