[Heathkit] HX-10 Maurader

Sun, 3 Mar 2002 20:37:55 -0500

Hello to the group,

I have confirmed that the main transformer is bad.  I removed the two input
wires to the main transformer.  Upon plugging in the a/c, the VFO filiments
lit.  Upon turning on the main power switch, nothing happend (as expected),
confirming that the wiring is good to all but the transformer.  Upon
reattaching the two main transformer input wires, the fuses blew upon
turning on the main power switch.

Anyone have a spare transformer that they would part with?

Thanks for all your suggestions.

Regards,

Jim Temple
73, KF4ICZ

----- Original Message -----
From: "JACK M IVERSON" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>
Sent: Sunday, March 03, 2002 3:09 PM
Subject: Re: [Heathkit] HX-10 Maurader

> HI  remove the high voltage leads from each rectifier socket.   then
> power it up to see if you are still getting high input current, if so -
> bad power tx.  If it is ok then --  the black socket material does arc
> and carbonize, common in the 5R4 GY sockets in some collins gear. the fix
> is to replace the sockets with ceramic ones or the yellow mica filed
> types.
> old jack     [email protected]
>
> On Sun, 3 Mar 2002 15:00:59 -0500 "Jim Temple" <[email protected]>
> writes:
> > Hello to the group,
> >
> > I recently picked up one of these.  With both rectifier tubes
> > removed, the
> > unit still blows fuses.
> >
> > There is clearly a dead short somewhere.  I have been over the
> > wiring
> > several times and can not see a short.
> >
> > The two VFO tube filiments illuminate ok, so that transformer is
> > ok.
> >
> > Next, I will disconnect all wires to the accessory plug to eliminate
> > that
> > wiring.
> >
> > I suspect that the main transformer has a short.  How can this
> > transformer
> > be tested?  Is there an ohm value that is appropriate for the HV,
> > LV, and
> > three filiment windings, or is there a way to power it separately to
> > test
> > the various sections?
> >
> > Thanks for any suggestions on transformer testing.
> >
> > Sincerely,
> >
> > Jim Temple
> > 73, KF4ICZ
> >
> >
> >
> > _______________________________________________
> > Heathkit mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/heathkit
> >
>