No audio-hq-129-X
 

Hello all, I've inherited my dads old Hammarlund 129, (actually, This
radio was by my bedside all my growing years), well my father passed
away three weeks ago and I got this beloved radio. It hadn't been fired
up in 20 years and there is simply no audio output.`I fully plan to
recap this rig, but I'm not sure this is the problem. All tubes fire
up, no I have not tested them yet. You fellers have any clues to a
possible problem? T6 audio transformer bad?? How do you test this
transformer...The electrolytic cap measures excellent voltage at all
three terminals, not shorted to case. This will be my first radio
restore, and any help is greatly appreciated...Thank You...Randy

No audio-hq-129-X
 

Chances are it is one are several of those old papaer caps.

Just start with that and you will never look back.

One quick check you can do however with the audio section is touch the
wiper terminal on the audio gain pot with
you should hear a hum if the audio section is good.

But just recap the set , it does not cost that much to do. Paper caps were
junk from the day they left the factory.

And I know someone on this list will defend the virtues of the paper cap.
whatever.

wrote in message
oups.com...
Hello all, I've inherited my dads old Hammarlund 129, (actually, This
radio was by my bedside all my growing years), well my father passed
away three weeks ago and I got this beloved radio. It hadn't been fired
up in 20 years and there is simply no audio output.`I fully plan to
recap this rig, but I'm not sure this is the problem. All tubes fire
up, no I have not tested them yet. You fellers have any clues to a
possible problem? T6 audio transformer bad?? How do you test this
transformer...The electrolytic cap measures excellent voltage at all
three terminals, not shorted to case. This will be my first radio
restore, and any help is greatly appreciated...Thank You...Randy

No audio-hq-129-X
 

On 20 Aug 2006 05:56:53 -0700, wrote:
All tubes fire up, no I have not tested them yet. You fellers have any clues to a
possible problem? T6 audio transformer bad?? How do you test this
transformer...

Are you getting any audio at the headphone jack? Some receivers turn
off the speaker when you plug in the headphones. They do that by
routing the speaker output through some contacts on the headphone jack
so that when you insert the headphones it opens the speaker circuit.
I've had those contacts get cruddy so you don't get anything out of
the speaker. When that happens you can still get audio out of the
headset. Then again, you might just have one or more bad tubes.

S.T.W

No audio-hq-129-X
 

wrote:
Hello all, I've inherited my dads old Hammarlund 129, (actually, This
radio was by my bedside all my growing years), well my father passed
away three weeks ago and I got this beloved radio. It hadn't been fired
up in 20 years and there is simply no audio output.`I fully plan to
recap this rig, but I'm not sure this is the problem. All tubes fire
up, no I have not tested them yet. You fellers have any clues to a
possible problem? T6 audio transformer bad?? How do you test this
transformer...The electrolytic cap measures excellent voltage at all
three terminals, not shorted to case. This will be my first radio
restore, and any help is greatly appreciated...Thank You...Randy

Is there a hum from the audio, and if so does it change with the volume
control?

Check the paper caps... just check them all with an ohmmeter and I bet
you find at least one shorted one. I'd tend to shotgun them all out
myself, but find the problem first before you go swapping the rest
of them out.

The transformer almost certainly won't fail... not unless it's damaged
as the result of a tube or cap failure.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

No audio-hq-129-X
 

Thanks all for the replies guys. There was the typical DC thump when I
turned the set on, and now that doesn't even happen... and yes I
definately tried the headset to try and isolate the problem. I could
also hear the scratchy sound of the pots that needed cleaning through
the speaker so it's a little bit of a headscratcher at this point. I
will take the tube tester to it tomorrow eve, and try to knock any
relative tubes out of the equasion. Can a tube still be bad if it
lights and heats up???
wrote:
Hello all, I've inherited my dads old Hammarlund 129, (actually, This
radio was by my bedside all my growing years), well my father passed
away three weeks ago and I got this beloved radio. It hadn't been fired
up in 20 years and there is simply no audio output.`I fully plan to
recap this rig, but I'm not sure this is the problem. All tubes fire
up, no I have not tested them yet. You fellers have any clues to a
possible problem? T6 audio transformer bad?? How do you test this
transformer...The electrolytic cap measures excellent voltage at all
three terminals, not shorted to case. This will be my first radio
restore, and any help is greatly appreciated...Thank You...Randy