Fried Fender Bassman 100t

ecc83

Mojoampguy said:

BASSMAN 100T FIXED. As I said the pictured amp looks like the one I had in for repair. owner was told "not economical repair". He brought it to me and I've fixed it. I had to replace the following parts in this particular case.

M1, M2 - MosFets
D261 - 16v 5 Watt Zener Diode
D256, D257 - 16v 0.5W Zener Diodes
R283 - 22 ohm 2W resistor
D252 - 1N4006 diode
Mains Fuse F4Amp
Screen Fuse - F100mA

Several tracks were obliterated and needed to be rewired. 

Now its all back together and functioning as it should.  Hope you find this useful. And before you ask, No I don't know what caused it to fail in the first place. All valves are in good working order. Best of luck with yours.   

Any chance of a schematic? And well done, we MUST repair as much as we can.

Dave.

ElectricXII

Mojoampguy said:

BASSMAN 100T FIXED. As I said the pictured amp looks like the one I had in for repair. owner was told "not economical repair". He brought it to me and I've fixed it. I had to replace the following parts in this particular case.

M1, M2 - MosFets
D261 - 16v 5 Watt Zener Diode
D256, D257 - 16v 0.5W Zener Diodes
R283 - 22 ohm 2W resistor
D252 - 1N4006 diode
Mains Fuse F4Amp
Screen Fuse - F100mA

Several tracks were obliterated and needed to be rewired. 

Now its all back together and functioning as it should.  Hope you find this useful. And before you ask, No I don't know what caused it to fail in the first place. All valves are in good working order. Best of luck with yours.   

Congratulations on bringing that beastie back from the dead. I'd love to see a pic of the repaired board if you have one.

InactiveX

JJJr said:

These are all good ideas, im considering seeing if someone can build something with the internals, the price is scary as though as these run £800 second hand so ..

Get another one and keep the burnt out one for spares?