[Hammarlund] SX28A, was 'first SP-600 JX-26'

pete wokoun, sr. pwokoun at hotmail.com
Sat Mar 11 03:03:49 EST 2006 

Bob,
  #1, I might suspect your fingers may have 'moved' or shorted something 
underneath the chassis when you grabbed it to move.  Look around that corner 
where the power transformer is located.
  If not and my money is on this, #2, this rcvr has a .01 cap from each 
transformer primary lead to chassis ground.  I bet one of these is shorted!  
Make sure you change each of these along with all those others that need to 
be changed.  I have a hunch you flipped the power plug from what you had 
when you were using the variac.  With the plug in one direction the power 
neutral would be shorted to the chassis with no real disaster but when the 
plug is reversed the power hot would be shorted to chassis which is also 
connected to your ground.  THAT would blow a fuse fast.  Also it's a good 
idea to replace that original 2 wire power cord with a 3 wire grounded plug. 
  You should be able to connect A2 to G without any problems.

  Yes, there is a hallicrafters list like this hammarlund one, but it is 
pretty screwed up right now.

pete



>From: "Bob Young" <youngbob53 at msn.com>
>To: "hammarlund" <hammarlund at mailman.qth.net>
>Subject: Re: [Hammarlund] first SP-600 JX-26
>Date: Fri, 10 Mar 2006 23:29:27 -0500
>
>I realize this is the Hammarlund list but I have a question about an SX-28A
>I just bought, I brought it up on a variac (was told it ran fine, I just 
>did
>it as I didn't know how long ago fine was) and it did run fine, but I had 
>an
>unfortunate problem with it. I shut it off to move it and when I did I ran 
>a
>ground to the ground lug which was also hooked to A2 with the LW hooked to
>A1 the way most receivers are run with single LW's. I plugged it in and the
>second I turned it on it blew the fuse (damn slo blo which I never use) and
>also took out the primary on the power transformer I think. It blew like it
>was a dead short. The manual isn't clear to me whether it's OK to run the
>ground with A2 also hooked to it. Is there also a Hallicrafters list?
>E-mail off-list is fine.
>
>Bob Young
>
>
>----- Original Message -----
>From: "Duane Fischer, W8DBF" <dfischer at usol.com>
>To: "Bob Young" <youngbob53 at msn.com>
>Sent: Thursday, March 09, 2006 12:29 AM
>Subject: Re: [Hammarlund] first SP-600 JX-26
>
>
> > Bob,
> >
> > Now hear this son! Let the rig warm up on the Variac for 72 hours! SLOW!
> > The
> > capacitors take time to reform, if they will reform. If you hurry it, 
>you
> > risk one of the electrolytics exploding and a fire. So desptie what 
>anyone
> > tells you Bob, bring it very very slow and keep your eyes on it all of 
>the
> > time. do not go off and leave it alone! If something goes wrong you want
> > to
> > be there to kill the power immediately and save serious damage from 
>taking
> > place.
> >
> > There are quite a few black beauties in the receiver, all of them are
> > leaking and/or split, they all must be changed!
> >
> > I do not know how much experience you have doing this Bob, so let me 
>give
> > you some warnings here. This is NO job for a person who does not have
> > experience or greater than average technical skills. There are sections 
>in
> > the 600 and the SX-28 that you are going to wonder how in the world to 
>get
> > apart, let alone replace parts. But all of those old capacitors need to 
>go
> > Bob. it is far better to do them all right up front, as you do not want 
>to
> > have to tear it apart six months from now just to replace one capacitor
> > that
> > failed because you thought it would be alright.
> >
> > One excellent source to do the work is Phil Atchely, KO6BB. I think I 
>gave
> > you his name? It has been a bad past 1.5 days here thanks to Gary Brown 
>in
> > Maine.
> > beaconeer at sbcglobal.net
> >
> > Duane W8DBF
> >
> > ----- Original Message -----
> > From: "Bob Young" <youngbob53 at msn.com>
> > To: "Duane Fischer, W8DBF" <dfischer at usol.com>; "hammarlund"
> > <hammarlund at mailman.qth.net>
> > Sent: Wednesday, March 08, 2006 10:55 PM
> > Subject: Re: [Hammarlund] first SP-600 JX-26
> >
> >
> > > Yes I thought so, I'm not going to power it up again until I've 
>changed
> > > out all the bad caps, damn! Well, anyway for a consolation prize I
> > > picked
> > > up an SX-28A, powering it up right now on a variac and a DX-100 with a
> > > nice old Astastic mic with a base today, gotta hurry up and take the 
>ham
> > > tests,
> > >
> > > Bob Young
> > >
> > >
> > > ----- Original Message -----
> > > From: "Duane Fischer, W8DBF" <dfischer at usol.com>
> > > To: "Bob Young" <youngbob53 at msn.com>
> > > Sent: Wednesday, March 08, 2006 11:31 PM
> > > Subject: Re: [Hammarlund] first SP-600 JX-26
> > >
> > >
> > >> Sounds like bad capacitors - Time to get to work Bob!
> > >> ----- Original Message -----
> > >> From: "Bob Young" <youngbob53 at msn.com>
> > >> To: "Ziegenbein, Randy" <rziegenbein at volcanotherapeutics.com>;
> > >> "hammarlund"
> > >> <hammarlund at mailman.qth.net>
> > >> Sent: Wednesday, March 08, 2006 10:15 PM
> > >> Subject: Re: [Hammarlund] first SP-600 JX-26
> > >>
> > >>
> > >> > Yes it does but not instantly, it takes a few seconds to come back
> > >> > on.
> > >> > Even if the RF gain is all the way down when I switch it to AVC 
>it's
> > >> > clear
> > >> > and blasts for a second or two becomes more and more distorted and
> > >> > then
> > >> > blanks out, this take maybe 2-3 seconds total. It then seems to 
>take
> > >> > a
> > >> > second or two to recover after the AVC switch is shut off.
> > >> >
> > >> > Bob Young
> > >> > Millbury, Ma
> > >> >
> > >> >
> > >> > ----- Original Message -----
> > >> > From: "Ziegenbein, Randy" <rziegenbein at volcanotherapeutics.com>
> > >> > To: "Bob Young" <youngbob53 at msn.com>
> > >> > Sent: Wednesday, March 08, 2006 11:19 AM
> > >> > Subject: RE: [Hammarlund] first SP-600 JX-26
> > >> >
> > >> >
> > >> > Does it come to life if you back off the rf gain?
> > >> > 73, Randy
> > >> >
> > >> > -----Original Message-----
> > >> > From: hammarlund-bounces at mailman.qth.net
> > >> > [mailto:hammarlund-bounces at mailman.qth.net] On Behalf Of Bob Young
> > >> > Sent: Tuesday, March 07, 2006 11:14 PM
> > >> > To: hammarlund
> > >> > 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
> > >> > _______________________________________________
> > >> > List Administrator: Duane Fischer W8DBF
> > >> > ** For Assistance: dfischer at usol.com **
> > >> > ----
> > >> > http://mailman.qth.net/mailman/listinfo/hammarlund
> > >> >
> > >> >
> > >> >
> > >> > --
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> > >> > Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date:
> > >> > 3/3/2006
> > >> >
> > >> >
> > >>
> > >>
> > > _______________________________________________
> > > List Administrator: Duane Fischer W8DBF
> > > ** For Assistance: dfischer at usol.com **
> > > ----
> > > http://mailman.qth.net/mailman/listinfo/hammarlund
> > >
> > >
> > >
> > > --
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> > > Checked by AVG Free Edition.
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>3/3/2006
> > >
> > >
> >
> >
>_______________________________________________
>List Administrator: Duane Fischer W8DBF
>** For Assistance: dfischer at usol.com **
>----
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