#1
I have a 50 watt crate amp that's been giving me big problems lately. While I was playing it at a reasonable volume with little distortion, the amp suddenly shut off, with no popping noise or anything. It was an instant effect- sound, then no sound. I did a bit of research, and wound up replacing the fuses (one WAS blown), the power tubes, switched around the preamp tubes, and tested to see if the switches were still working properly. The only other think I think is significant is that the left side of the circuit board is making a clicking noise, very faint, but still audible when you listen. What to do?
#2
This clicking noise intrigues me. Can you identify where it is actually coming from? A wooden spoon - repeat WOODEN, makes a good stethoscope. Be very careful, but try to identify it for me.

Btw, you should have just posted in your previous thread.
Gilchrist custom
Yamaha SBG500
Telecasters
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Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#3
chopsticks are better yet. i have a few on my bench. they are free
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#4
I like wooden spoons. The scoop part makes a great earpiece.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#5
Not really an expert when it comes to using a spoon as a stethoscope, but I think it's near the right side of the board. Clicking is extremely quiet, and has a tempo of about 100 BPM, it is consistent is accompanied by the EXTREMELY soft humming of current passing through that part of the circuit. it's either coming from what looks like little capacitors or this 1.5"X1.5" yellow box with a cylinder enclosed, wrapped in copper tape.
Last edited by AGaySpaceTiger at Oct 6, 2014,
#6
Pictures?
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#8
That looks like it is the power transformer. If that's clicking I'd be very worried. That would have to be laminations vibrating which points to a huge power drain somewhere. This has now gotten beyond help over a forum. It needs to go to a tech. Sorry.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band