[Amps] Need some amplifier advice

[Carl]

----- Original Message ----- 
From: "Jim Thomson" <jim.thom at telus.net>
To: "Carl" <km1h at jeremy.qozzy.com>; <amps at contesting.com>
Sent: Friday, June 28, 2019 1:34 AM
Subject: Re: [Amps] Need some amplifier advice


>
> <Id suggest 3B28's in placeof 866A's however, a direct swap.
>
> <Carl
>
> ##  are 3b28 and 866s still  available ?   How long will the filaments in 
> them last ?

Forever for 3B28's has been my experience so far and they are readily 
available nor do they flash over like 866A's.

> I only have experience with 816s and  866s... mid 70s era.   Worked  good 
> at the time.
>
> ##  Then I discovered  1N5408s.   Then 6A10s.   10A10s  and  10A07s  are 
> both  10 A rated.
> The  10A07 is  600A  surge rated.
>
> ##  IF the tube rectifiers are still available, and plentiful... go for 
> it. And if  sources eventually dry up,
> then a swap to  SS  rectifiers is  straightforward.
>
> Jim   VE7RF

Direct SS plug in replacements are still everywhere as so many were produced 
for broadcast, military, and other electronics as the 1N2367 and a few other 
numbers. I used a pair a few years ago in a Bauer 707 BC TX I maintain.

Carl
> 


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