[ARC5] 10 meter BC-454 - yet more

[Ian Wilson]

Interesting. I have an early original (typewritten) RBB-1/RBC-1 manual.
This shows several 6AB7 in each receiver, but no 6AC7's. I wonder if
the lineup changed (my manual is marked "preliminary, discard" <g> ).

73, ian K3IMW

On Tue, Feb 5, 2013 at 9:36 AM, Geoff <geoffrey at jeremy.mv.com> wrote:

> SX-28, RBB/RBC, some Nationals, for starters. It was also used as an early
> TV tube, in some test equipment, as well as Harry Hambone sticking it in a
> RF and IF amp.
>
> BTW, Ian, do I owe you a PW dial?
>
> Carl
>
>
>
> ----- Original Message ----- From: "Ian Wilson" <ianmwilson73 at gmail.com>
> To: "ARC-5 List" <arc5 at mailman.qth.net>
> Sent: Tuesday, February 05, 2013 11:23 AM
>
> Subject: Re: [ARC5] 10 meter BC-454 - yet more
>
>
>  Where were 6AC7's actually used? They show up regularly in fairly
>> large numbers in piles of metal octals, etc. My guess is that they were
>> used as IF amplifiers in radar sets. I don't recall seeing any in the
>> Surplus Conversion Manual schematics, though, so I wonder when
>> they were introduced?
>>
>> 73, ian K3IMW
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>