[R-390] Tube Swapping in IF Deck

[Barry]

Yes - I think I found what I was looking for in that document.

Thanks to all,
Barry - N4BUQ

----- Original Message -----
> From: "R-390 Mailing List" <r-390 at mailman.qth.net>
> To: "Barry Scott" <72volkswagon at gmail.com>
> Cc: "R-390 Mailing List" <r-390 at mailman.qth.net>
> Sent: Tuesday, October 15, 2024 11:05:01 AM
> Subject: Re: [R-390] Tube Swapping in IF Deck

> Bet Roger's post & others will be found in
> https://r-390a.net/Pearls/sensitivity_alignment.pdf
> 
> 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
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>>
> 
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html