[R-390] R-390A Alternatives for regulator 3TF7 - 12BH7, 12BY7, etc

[Barry]

It's a bit kludgey but I think there's a 6.3V tap on the transformer that can be brought up to the 3TF7 socket and then you can continue to use the 6V tubes without a regulator or 12V tube in the 3TF7 socket with a jumper.  I did that with one of my previous radios by routing a wire through the wiring harness to the IF module's plug/socket and then on to the 3TF7 socket, but a plain old jumper wire all the way from the P/S up to the IF chassis would do in a pinch (and would be more obvious to the next owner as well).

Regards,
Barry - N4BUQ

----- Original Message -----
> From: "Craig" <hamfish at comcast.net>
> To: "Larry H" <dinlarh at att.net>, "390 List" <r-390 at mailman.qth.net>
> Sent: Friday, April 8, 2016 8:25:27 AM
> Subject: Re: [R-390] R-390A Alternatives for regulator 3TF7 - 12BH7, 12BY7,	etc
> 
> Another option to replace the 3TF7, thus saving money for good whiskey:
> Jumper pins 2 & 7 on the 3TF7 socket and replace the 6BA6 tubes for the BFO
> & PTO with 12BA6 tubes.
> 
> Regards,
> Craig
> 
> -----Original Message-----
> From: R-390 [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Larry H
> Sent: Thursday, April 07, 2016 9:35 PM
> To: 390 List
> Subject: [R-390] R-390A Alternatives for regulator 3TF7 - 12BH7, 12BY7, etc
> 
> If you have the 2 wire change on the regulator socket, these can be plugged
> in and work well: 12BH7, 12BY7, 12CT8, 12DQ7, and 12FX8. Regards, Larry
> 
>      
>   
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