CHAMP ELECTRONICS -" THE VINTAGE VALVE
AMP HOSPITAL"
NOTTINGHAM, ENGLAND
SERVICING OF A LANEY LC15 COMBO
AMPLIFIER
Coming through the workshop as a completely dead unit, it didn’t take long to diagnose the duff output transformer.
Typical scorching of a PCB with the heat from the output tubes. This also dries out the solder over time.
The
new output transformer in place. Notice at the side of the original, I
have used a larger stack size. In my opinion, some of the later Laney
(BLT Products) use output transformers that are really too small. The
larger one that I made for this sounds so much better, with more
headroom. Check-out Richard’s testimonial e-mail at the end of
the article.
I
had run out of the blue card I usually use to finish a transformer
winding so….I had to finish it with the Mylar tape instead. It
doesn’t look so nice but the transformer still works the same!
RICHARD'S EMAIL REGARDING THE LANEY:
"Hi John.
Thanks
for the photos and for the work done. The amp sounds great and
the new output transformer has really improved the tone, headroom and
power-stage overdrive.
Cheers, Richard”
