[R-390] Tube Swapping in IF Deck

[hamfish at comcast.net]

Barry,

If you found this, https://r-390a.net/faq-refs.htm

Look at the next listing below "The Pears". There is a condensed version of the post by Roger. In the meantime I'll search Pearls, might be in the IF saved posts?

Or.....................I could scan the reply that was printed in 2005.

Regards,
Craig:WD8KDG

-----Original Message-----
From: Barry Scott <72volkswagon at gmail.com> 

Sent: Tuesday, October 15, 2024 8:40 AM
To: hamfish at comcast.net
Cc: R-390 Mailing List <r-390 at mailman.qth.net>
Subject: Re: [R-390] Tube Swapping in IF Deck

I don't see any posts from that date in the version of the Pearls I'm looking in.  Maybe it's in a different version somewhere?

Thanks,
Barry - N4BUQ

On Tue, Oct 15, 2024 at 10:34 AM <hamfish at comcast.net> wrote:
>
> Barry & All,
>
> I saved that reply from Roger KC6TRU, dated Monday, September 26, 2005 
> @ 6:35PM. Most likely saved in Pearls? Someone might need a warehouse 
> full of vacuum tubes. I'm glad to have a few replacements.
>
> Regards,
> Craig:WD8KDG
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On 
> Behalf Of Barry Scott
> Sent: Tuesday, October 15, 2024 8:12 AM
> To: R-390 Mailing List <r-390 at mailman.qth.net>
> Subject: [R-390] Tube Swapping in IF Deck
>
> I seem to recall a post many years ago from Roger Ruszkowski regarding 
> swapping tubes in the IF and/or RF deck to get the best performance.
> I think he suggested swapping specific pairs and moving through the 
> deck that way but I don't quite remember the process.
>
> There's a post in the Pearls dated Fri, 1 Apr 2005 23:37:52 EST from 
> Roger that touches on this but I'm not sure that's what I'm thinking 
> of.  I may be thinking of just a process for the RF deck's mixers and 
> not the IF deck but, again, the memory is distant.
>
> Anyone know what I'm talking about and, possibly, familiar with that 
> process?
>
> Thanks,
> Barry - N4BUQ
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