"François Yves Le Gal" wrote in message
...
On Wed, 22 Mar 2006 15:49:39 -0800, "David Farber"
wrote:

I was able to measure 52 ohms (out of
circuit) from the red to the yellow wire of the output transformer. That
would not seem to be agreeable with the schematic which puts the red on
the
primary side and the yellow on the secondary.

For the TF/6-150

Primary
BRown (Plate) - Red (HT) - BLue (Plate)

Secondary
Yellow (8-ohm) - GReeN (4-ohm) - BLacK (ground)

Looks like the output
transformer is bad.

Could be. I would suggest full tests on the trafo.

Maybe the people at the Music Man Amps Discussion Forum can help you.
http://www.pacair.com/cgi-bin/discus....cgi?pg=topics



Here are the readings I measured:

Red to brown: 137k ohms.
Red to blue: 103 ohms.
Yellow to green: Less than 0.3 ohms.
Yellow to black: 0.4 ohms.
Red to yellow: 51 ohms.

No doubt about it, this transformer is bad.

Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA