• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

6505+ repair need some help

nonoxxx

Member
2018-09-09 8:05 am
Hello,
I received for free a 6505+ 112 combo that I'am trying to fix.

I don't know what happens because I don't know too much the previous owner it 'seem that He try t replace some components .

https://www.thetubestore.com/lib/thetubestore/schematics/Peavey/Peavey-6505PLUS-112-Schematic.pdf
I replaced C32 / C33 the big filtering caps , R102, R103
R 17 was fried but strangely the value was 470 instead of 390 on the schematic I put the same .
the diode rectifier D19 /D18 /D24/D23 .
I tested all components of the supply stages with a multimeter ( rectifier, resistors ... )


After that I probably made a noob error : I powered it without tubes and C33 fryed again while putting the standby on .
I would like to know what is the best way to test it ? and to be sure something will not fry again when powering it on ?

Thanks,