Electronics > Repair
Replacing old five pin capacitors
reddish75:
I am finally thinking about refurbishing an Audio Research D76 someone gifted me and am wondering on the best way to replace the power supply caps (x6 600uf 300v) they are five pin I think old Mallory caps. I have seen an adaptor someone made for a broken Tek scope but I'm not sure they would be suitable for the voltage I need as they replaced 75v caps (please see pic) the other option seems new caps of that value and voltage tend to be snap on would be to drill the pcb and jumper one terminal across. Any thoughts?
Grandchuck:
http://www.rsdsound.co.uk/product/axial-to-radial-electrolytic-capacitor-adapters/
james_s:
A lot of guys just install new modern capacitors under the chassis and leave the originals in place but electrically disconnected. If you want to get fancy you can disassemble them, pull out the guts and stuff modern parts inside them, usually new capacitors are smaller and can fit in the old can.
wraper:
Imho you could just put a new capacitor into positive and one of the negative holes which match the pin pitch the most. Of course it does not work if you want to retain original look.
Gyro:
Irrc, on some Tek 400 series scopes, the PCB uses capacitor negative tabs for trace continuity. Not a problem, but you do need to check and, if necessary, jumper the pads to maintain continuity.
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