[Amps] Different versions of 3-500 tubes in amp

[Carl]

As long as both tubes draw similar idle current there shouldnt be any power 
hogging.

Ive mixed all sorts of configurations including one or two 4-400A's in amps 
that were true GG.
At reduced power you could even use 4-250A's

Carl




----- Original Message ----- 
From: "Ron Youvan" <ka4inm at gmail.com>
To: "amps" <amps at contesting.com>
Sent: Wednesday, January 23, 2019 8:42 AM
Subject: Re: [Amps] Different versions of 3-500 tubes in amp


> On 1/22/19 20:54, Warren KD5YPH Volz wrote:
>
>> I've decided one of the two tubes in my SB-220 is weak and I'd like to
>> get a replacement. Right now both are original Eimac tubes with the
>> non-graphite anode but I see most replacements are graphite. Will there
>> be any issue running tubes with different anodes in this amp?
>
>   I think the nature of the anodes is of minor interest, but the
> difference between the emission of a new tube and an old tube is a 
> concern.  The new tube should hog the current and make you think the
> remaining old tube is also bad.
>
>   I think another used tube or a pair of new tubes is in order.
> -- 
>   Ron  KA4INM - Youvan's corollary:
>                 Every action results in unwanted side effects.
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