[Amps] Checking 8163s

[David H Craig]

    Thanks to all for the responses.  Wanted to be sure I gave them a fair 
test before putting them on the display shelf.  They are beautiful, but 
essentially dead tubes.

    73 Dave N3DB


----- Original Message ----- 
From: "Paul Kraemer" <elespe at lisco.com>
To: "David H Craig" <n3db at radix.net>
Sent: Saturday, October 11, 2008 7:05 PM
Subject: Re: [Amps] Checking 8163s


> Dave
> Should sub ok. Lower ouput capability though so don't overdo drive. The 
> small bias is more of a linearity thing. Older amps that were designed 
> around the 400 accept the 500 (Loudenboomer HT-45)
> Paul K0UYA
> ----- Original Message ----- 
> From: "David H Craig" <n3db at radix.net>
> To: <amps at contesting.com>
> Sent: Saturday, October 11, 2008 4:16 PM
> Subject: [Amps] Checking 8163s
>
>
>>    Is it reasonable to test a pair of 3-400s in an SB220 ?  If I remember 
>> correctly the 3-500 is also a "zero bias" tube - that said, would the 
>> slight bias voltage (6.? I forget) in my 220 create a false read insofar 
>> as these 8163s potential output is concerned?
>>
>> 73 Dave N3DB
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>
>