Thanks for the offer of help. One for starters is the STC 4011B (see it at
www.qsl.net/g8gsq )
which looks quite like 211/vt4. Another old domestic type is a Philips 323,
can't see inside to figure out what sort it is.
I'm waiting to get another look at the C1112 I mentioned before. Marv gave
4-250A equivalent from the Eimac catalogue, but in my own mind I'm convinced
that what I looked at was a triode. The guy with those said there were some
more similar tubes, but no markings to be seen on them. Hence the question
about measuring the filament V/I characteristic and trying to guage the
operating point from that.
Steve
>
>Steve: can you Identify the tubes??If so , lots of us still have tube
>manuals(well, maybe not lots, but a few) carl / kz5ca
>----- Original Message -----
>From: "Steve Thompson" <g8gsq@qsl.net>
>To: <amps@contesting.com>
>Sent: Monday, June 11, 2001 2:57 PM
>Subject: [AMPS] Filament ratings
>
>
>>
>> Is there a way of guessing at the correct settings from V/I measurements?
>>
>> I have some tubes where I can't find any data and I'd like to try and
>figure
>> out what they might do. The first step has to be getting the filaments
>> right. I don't want to do it solely by glow or colour - in some cases,
>they
>> are early domestic rx types (ok, I know that's off topic) and might be
>dull
>> or semi-dull emitters.
>>
>> Thanks,
>>
>> Steve
>>
>>
>> --
>> FAQ on WWW: http://www.contesting.com/FAQ/amps
>> Submissions: amps@contesting.com
>> Administrative requests: amps-REQUEST@contesting.com
>> Problems: owner-amps@contesting.com
>>
>>
>
>
>--
>FAQ on WWW: http://www.contesting.com/FAQ/amps
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>
--
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