[NJARC] tube shield question

[Al Klase]

Bill,

My wild guess is that this was a metal-tube set, except for the 5Y3, in 
the first place.  I don't think the GT's will make any real difference.  
The input capacitances on the 6K7/6K7GT are just slightly different, so 
you might want to touch up the IF tuning. The metal base shell on the 
GT's is connected to pin 1, so the shields are functional.

Al

On 6/18/2018 2:11 PM, William S Zukowski wrote:
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> _________________________________________________________
>
>
> Repairing a Belmont 686 where both the 6K7 (IF amp) and 6Q7 (2d det., 
> 1st audio) have bee replaced with GT tubes and metal shields slipped 
> over the tube onto the metal base.
>
> The radio is very alive, but I have not yet done an alignment. Any 
> opinions on the tubes?  Replace with metal tubes, leave the shields on 
> / off?
>
> Considering their functions, I really don't think this is an issue?
>
> Thanks,
> Bill
>
>
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

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