[Hammarlund] first SP-600 JX-26

[Bob Young]

I just sent an e-mail to Phil, we'll see what he has to say, I was going to 
tackle it myself but actually don't have a lot of time nor a lot of space to 
do so at the moment. I did put the tubes back in where they came from and 
have been using the RF control as a volume control with the AF volume all 
the way up, noise limiter off. No overloading like that, incidentally the S 
meter is getting voltage, what is the normal voltage for it? I'm getting 
only a couple of Volts at most before it overloads.

Bob Young


----- Original Message ----- 
From: "Duane Fischer, W8DBF" <dfischer at usol.com>
To: "Bob Young" <youngbob53 at msn.com>
Sent: Wednesday, March 08, 2006 3:00 AM
Subject: Re: [Hammarlund] first SP-600 JX-26


> Dear Bob,
>
> When removing tubes, and there is more than one of a tube, be sure you put
> the same tube you removed back into the same socket! Yes it does make a
> difference!
>
> I do not know where you had the RF gain set but turn it down. Turn the 
> noise
> limiting off. The AVC and AGC work differently on different sets, some are
> affected by ANL etc.
>
> It sounds to me as if the set has multiple issues.
>
> 1. Capacitors that are failing causing circuit instability.
>
> 2. Resistors out of tolerance.
>
> 3. Weak components, including tubes, that have adversely affected the 
> proper
> alignment. No point in aligning the RX until the weak components have been
> removed and replaced.
>
> I would suggest that you contact Phil Atchley, KO6BB in central, CA. Phil 
> is
> a brilliant tech with forty+ years experience, twenty with the U.S.A.F. He
> has rebuilt a number of the Hammarlund 600 series, including one that
> arrived in a bushel basket, literally!
>
> He is very up front, totally honest, charges a fair price (generally too
> little!) and knows what he is talking about. If he does not know, he says
> so.   He has rebuilt eight different receivers for me over the years and I
> would not consider having anyone else do my work as long as Phil is 
> willing
> and able.
>
> beaconeer at sbcglobal.net
>
> Duane W8DBF
>
> ----- Original Message ----- 
> From: "Bob Young" <youngbob53 at msn.com>
> To: "hammarlund" <hammarlund at mailman.qth.net>
> Sent: Wednesday, March 08, 2006 1:13 AM
> Subject: [Hammarlund] first SP-600 JX-26
>
>
> >I got my first SP-600 today which incidentally was on ebay a few weeks 
> >ago,
> >here are the problem(s):
> > The AVC does not work, when the switch is up in the AVC position, it 
> > gets
> > very loud for a second or two, then gets very distorted and blanks out 
> > all
> > the sound for a few seconds, even with the switch in AVC off then it 
> > comes
> > back. It receives on all bands but is VERY insensitive and noisy on all
> > bands except for the bottom two bands and even there I'm sure it should 
> > be
> > more sensitive. The dial calibration is excellent, everything is where 
> > it
> > should be pretty much, WWV is at 2.5, BCB's are very close within a few
> > kHz. Most of the tubes tested good although several tested marginal and
> > one (6AC7) tested dead. I can see why people fall in love with these
> > radios, solid, solid, solid.
> > The lettering is black instead of white which must be a repaint, the 
> > front
> > panel paint is nice, is there an easy way to repaint the lettering 
> > white?
> > Maybe get some white enamel and wipe it into and across the engraved
> > letters with a rag? I have seen and downloaded the cap article there and
> > expect to do that and completely re tube it. Any help of hints advice 
> > will
> > be appreciated,
> >
> > here are some pictures of it which the former owner took:
> >
> > http://home.inreach.com/papillon/eBayPics/Hammerlund/
> >
> > Bob Young
> > Millbury, Ma _______________________________________________
> > List Administrator: Duane Fischer W8DBF
> > ** For Assistance: dfischer at usol.com **
> > ----
> > http://mailman.qth.net/mailman/listinfo/hammarlund
> >
> >
> >
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