[Amps] Glass tube plate color
barrie at centric.net
Sun Aug 15 09:52:53 PDT 2010
Damit, Carl, that's a good question! I'll try that right away.
----- Original Message -----
From: "Carl" <km1h at jeremy.mv.com>
To: "Barrie Smith" <barrie at centric.net>; <amps at contesting.com>
Sent: Sunday, August 15, 2010 10:45 AM
Subject: Re: [Amps] Glass tube plate color
> What happens when you swap positions?
> ----- Original Message -----
> From: "Barrie Smith" <barrie at centric.net>
> To: <amps at contesting.com>
> Sent: Sunday, August 15, 2010 11:55 AM
> Subject: [Amps] Glass tube plate color
>> Speaking of class C, I have just completed a nostalgia rig using a
>> push-pull pair of VT-127As (somewhat similar to the 100TL, but looks like
>> a spaceman with grid and plate pins sticking out the sides).
>> I've been bench-testing it the last few days with a wimpy power supply.
>> Surprisingly, I'm up to 500 wattts out with 1300 volts on the plates.
>> I have several tubes, and have tried a couple of different pairs. In
>> both instances I've noticed that one tube will have a slightly brighter
>> plate glow than the other.
>> I'd like to have the tubes as closely matched as possible.
>> My question is: Which tube is most likely to be the better, the bright
>> one, or the cooler one?
>> Barrie, W7ALW, DN36au,
>> QRV 6M, 432 & 1296 EME
>> Amps mailing list
>> Amps at contesting.com
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