[Amps] Tubes, made in the USA, in the olden days; Films?

[Sam Carpenter]

They sure do look cool though!

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Carl
Sent: Monday, August 30, 2010 12:33 PM
To: Rob Atkinson; amps at contesting.com
Subject: Re: [Amps] Tubes, made in the USA, in the olden days; Films?

It runs out of steam above 20M and up plus it really should have some forced

air when pushing at ICAS ratings, seal ratings are only 145*C.  Its a fine 
AM tube but rather useless in GG SSB as its pretty low gain.

The audiophools like them also.

Carl
KM1H



----- Original Message ----- 
From: "Rob Atkinson" <ranchorobbo at gmail.com>
To: <amps at contesting.com>
Sent: Monday, August 30, 2010 12:02 PM
Subject: [Amps] Tubes, made in the USA, in the olden days; Films?


>I don't have the spec. sheet right in front of me but I recall the 833
> could put out a hell of a lot of power with no forced air cooling.
> 600 w. (but I forget what biasing) sticks in my mind but don't hold me
> to that.   Whatever it was, it was very high and made me wonder why it
> is not used in ham amps for all these operators who are obsessed with
> not having any blower noise.   My guess was supply, cost of the tube,
> and the (for hams) unconventional way they are mounted.
>
> Rob
> K5UJ
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> Amps at contesting.com
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