[ARC5] 10-Meter 274N RX - The 20-27 RAT-1

[Geoff]

In place of a 717A

Stick a 7 pin socket, a resistor and 6AK5 in an old octal base and you are 
ready to go in a 12/24V world.

For remote/semi remote 7 pin tubes you can try the first of the series 
6BA6/12BA6, and then 6BZ6, 6DC6, 6GM6 and a few others. For the best of the 
lot, the 6EH7, use a 9 pin socket. Pay attention to suppressor grid pinouts 
and filament currents.

Since it is such a simple radio it would make an excellent test bed.

Carl

----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: "ARC-5 List" <arc5 at mailman.qth.net>
Sent: Saturday, February 09, 2013 12:08 AM
Subject: Re: [ARC5] 10-Meter 274N RX - The 20-27 RAT-1


> On 8 Feb 2013 at 21:42, Geoff wrote:
>
>> For G&G try a 6AB7 and 6AC7 if you can work out a quick way to solve
>> the filament issue and compare to the mushroom.
>>
>> Carl
>
> Actually, the 'shroom' is a pretty good tube....ifn you can find one for a
> reasonable sum now.
>
> I have looked for 717As on eBay and have had difficulty.
>
> Ken W7EKB
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