[Amps] 1625

[Paul Kraemer]

We musta been a rebelious crowd Glen
Look at what WRL used on the plates of the EL34's in a LA-1 linear to get 
400 watts
PH kind of same way calling (4) 1625's an 800 watt linear. That was no small 
hv supply in there either.
Most guys I knew were way over 2kv on (4) 811's
Tubes and a lot of other things were cheaper then!
Paul K0UYA
----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
To: "'Colin Lamb'" <k7fm at teleport.com>; <amps at contesting.com>; "Rex Lint" 
<rex at lint.mv.com>
Sent: Thursday, February 12, 2009 5:19 PM
Subject: Re: [Amps] 1625


> The "olde tymers" used to tell me of running like 1000 volts on the plate 
> of a 6L6.  According to them, you had to send code pretty fast because a 
> short "dash" turned the plate red and a long "dash" melted it!
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
> --- On Thu, 2/12/09, Rex Lint <rex at lint.mv.com> wrote:
>
> The max rating for a 6AG7 is 300 V, so you ran them at 3.3 the max 
> voltage! It must be one tough tube.  The plate dissapation is 9 watts, so 
> 4*9 = 36 watts, and if you pegged the 200 ma meter, the input was 200 
> watts, so you were probably dissapating >66 watts - about twice their 
> rating.  I'll bet they WERE red!
>
> Water cooled?
>
> I ran a heathkit AT-1 that used one for an oscillator, then used a 6L6 for 
> the amp.  All told, about 30 watts!  If I'd only known....
>
> But that was in the '50's
>
>
>
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