Hi,
I'm new to this forum, but have been repairing hifi and guitar amplifiers for quite some time. I just finished working on a Fender Hot Rod DeVille and was somewhat astonished to find that in a 2002 build amp, which looked very clean, the power supply capacitors are going bad. I personally own an older DeVille which has all Illinois power supply capacitors and this one has worked great. But this newer one uses some other brand of capacitors and the two 22uf @ 500 volt ones are so bad that the preamp section goes into oscillation when ever you try to use the drive and or more drive switches. Are others out there finding power supply capacitor failures in amps this new ? In vintage amps, it is not uncommon to see the power supply capacitors still working fine. In fact the only reason I change them is that after 40 - 60 years, the probability of failure is high. But, I don't expect amps that are under 10 years old to have so many power supply capacitor issues. Are others experiencing this problem? I pulled the 22 uf capacitors in question and both read under 1uf. Not shorted, but way low on capacitance. Just seems strange to me. As I said, normally I work on vintage gear and I have just started taking in newer tube as well as solid state amps. Never thought I'd be doing a recap job on an amp that is under 10 years old. Scary.
I'm new to this forum, but have been repairing hifi and guitar amplifiers for quite some time. I just finished working on a Fender Hot Rod DeVille and was somewhat astonished to find that in a 2002 build amp, which looked very clean, the power supply capacitors are going bad. I personally own an older DeVille which has all Illinois power supply capacitors and this one has worked great. But this newer one uses some other brand of capacitors and the two 22uf @ 500 volt ones are so bad that the preamp section goes into oscillation when ever you try to use the drive and or more drive switches. Are others out there finding power supply capacitor failures in amps this new ? In vintage amps, it is not uncommon to see the power supply capacitors still working fine. In fact the only reason I change them is that after 40 - 60 years, the probability of failure is high. But, I don't expect amps that are under 10 years old to have so many power supply capacitor issues. Are others experiencing this problem? I pulled the 22 uf capacitors in question and both read under 1uf. Not shorted, but way low on capacitance. Just seems strange to me. As I said, normally I work on vintage gear and I have just started taking in newer tube as well as solid state amps. Never thought I'd be doing a recap job on an amp that is under 10 years old. Scary.
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