[NJARC] Hallicrafters SX-16 PS

[Scott Roberts]

The adapter is a straight through type, with the outside tabs,
and I'd used it last week with no issues. I will take a look and
see- maybe something got inside it, but I doubt it. The blown out
piece of the tube is on the pin which goes to the number 2
terminal on the transformer. Looks like blue wire: I am still
trying to find a chart of the transformer wiring and outputs- all
I find is the same one which is on the Hallicrafters schematic:
which has no values on it... I am checking for a short: when I
have the DMM set for continuity(beep) I get an alternating ow
volume beep between the tube contact on the socket, and the
chassis. (A solid chassis to chassis connection gets a solid tone
beep)

Anyone got a diagram of the transformer for an SX-16?

Scott

--- John Ruccolo <jr6v6gt at yahoo.com> wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Scott,
> 
> I figured you replaced the caps -- but I had to do a
> sanity check, just in case. ;-)
> 
> Hey, what about this "adapter" you put on the BFO
> socket? Could that have shorted to something?
> 
> I don't think the tube failed on its own (although
> *anything* is possible). I think something external
> caused it to fail. By your description, it sounds like
> the B+ got shorted to ground.
> 
> JR
> 
> --- Scott Roberts <ng19delta at yahoo.com> wrote:
> 
> > Visit our web site - See http://www.njarc.org
> > _______________________________________________
> > ALL CAPS REPLACED!!!!
> > 
> > The only change I made from last night was I rotated
> > the chassis
> > on the bench 180 degrees so I could access the BFO,
> > and put in
> > the adapter between the BFO 6J7 tube and socket, so
> > I could test
> > the voltages...
> > 
> > I will make the checks you just mentioned tonight,
> > and post my
> > findings. (I'm hoping my findings include another
> > 5Z3 tube in my
> > spares pile...)
> > 
> > When I was working on testing last night, I had the
> > chassis
> > upside down while I found the problem: then I put it
> > right side
> > up and ran it- I wonder if something in the tube was
> > damaged, and
> > came loose after it cooled, and shorted it
> > internally? 
> > 
> > Scott
> > 
>


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