[Hammarlund] Fw: Question about warm-up vs. signal strength-REPLY

[rbethman]

Mike,

For grins and giggles, swap V1 and V11.  The two 6BZ6s.  One is the 
first RF Amp, the other is the Calibrator oscillator.

See if this gives you a different result.

Bob - N0DGN

Mike & Coreen Smith wrote:
>  
>  
> Hi Guys,
>  
> As I was just typing a reply to another Hammurland list member, your 
> various reply emails came through.
> I am overwhelmed so I am just replying to the group now instead of 
> individually.  I am not a fast typist by a long shot.
>  
> I have checked each tube on a Tube Tester and they all checked very 
> well, with the exception of
> 2 (the 6c4 and I think a 6be6), both which I swapped out with new or 
> used tubes rating 75% or higher on my borrowed tester.
> I returned the tester, but have purchased 2 more online, but they are 
> not here yet.
>  
> Maybe I should go through and swap out 1 tube at a time, give them 
> each a 10-20 minute warm-up and
> see if I can find a tube that is perhaps "Weak" after warmup.
>  
> It's not a really "serious" issue, but I feel I am losing 6-12dB after 
> warmup....hmm, maybe it is bordering on serious, hi
>  
> It works waaaay better now with a new "6c4" and a new "6be6", but it's 
> still not "quite" up to snuff, even though all tubes are reading 75% 
> or better.
>  
> This must have been a real rockin' rig back in the 60's !
>  
> Mike ve9aa
>  
> p.s.-Carl suggested my SS transceiver as a signal source.   I actually 
> hadn't thought of that. Hmmm !
> I presume 3 or 4 watts into a dummy load ought to work.
>  
> Mike, Coreen & Corey Smith
> 699 Rte 616 Keswick Ridge
> NB
> Canada
> E6L 1T1

-- 
Bob - NØDGN

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