[Hammarlund] sp-600

Thu, 5 Feb 2004 11:49:12 -0600

Here's something I just discovered. If I put a long wire in the ant center
its seems very good, the 51-j3 is still a little bit better, but the j3 I
got is super hot on bb. If I connect a coax cable to the ant and clip the
long wire to the center of the other end it cuts the gain way down?????? In
other words just unscrewing the outer part of the coax from touching the
ground the signal goes back up. Is this normal?

----- Original Message ----- 
From: "Cecil Acuff" <[email protected]>
To: "DAN COTSIRILOS" <[email protected]>;
<[email protected]>
Sent: Wednesday, February 04, 2004 5:44 PM
Subject: Re: [Hammarlund] sp-600

> Hi Dan,
>
>         The SP-600 is like all other old tube radio's.  There are probably
> quite a few old dried out electrically leaky paper capacitors that effect
> the performance of the radio.  If you look under the radio and find a
bunch
> of black tubular capacitors with color bands on them that look like very
> large resistors that's probably the cause of at least part of your
problems.
> Some of the later radio's were lucky and had only ceramic disk caps
> installed in place of the black plastic tubulars.  But beware sometime
> having ceramic disk caps under the bottom side doesn't mean there are not
> paper caps in the RF Deck.  I have one that is like that awaiting some
bench
> time.
>
> If you touch something and the sensitivity increases something probably
> loose.  Be careful in there...there are electrical contacts that can be
> damaged that are hard if not impossible to find.
>
> As AL has pointed out you need to get a manual and get familiar with the
> radio.  Owning an old tube radio requires one to be knowledgeable about
how
> they work and equipped to handle repairs because there aren't any shops to
> take them to when something goes wrong.
>
> There not for everyone but they are great radios...
>
> By the way...the SP-600 was the standard for MW DXing for many
years...Still
> can hold it's own with the new radio's...just a little harder to use.
>
> Cecil...
> ----- Original Message ----- 
> From: "DAN COTSIRILOS" <[email protected]>
> To: <[email protected]>
> Sent: Wednesday, February 04, 2004 1:43 PM
> Subject: [Hammarlund] sp-600
>
>
> > I just got a sp-600 jx17. I also have a 51-j3. Is it normal that the j3
is
> > more sensitive on the Broadcast band? The j3 I have is fantastic and bb
> but
> > I thought the sp-600 just as good?  It is supposed to aliened correctly.
> > Dan
> >
> >
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>
>
>