Harman kardon a300 rebuild


Hi everyone. I’m replacing the can capacitors on my a300 with custom built caps from Hayseed Hamfest. The hot can (cardboard wrapped) is made by GE and its specs are printed on the can as 60-100 micro farads at 350v. I’m concerned about the range of uF as I need to specify a uF rating for them to build a new one. Should I specify 100uF or something in the middle like 80uF?

thanks in advance for your responses 

ccogopher

Showing 2 responses by imhififan

Well, everyone starts as a beginner. 😊

According to the schematic I would use 100μF for C23 and C24A, higher voltage rating wouldn’t hurt either. I don’t know why 650Ω and not 470Ω, you can try both for best performance.

BTW, since you are rebuilding it, my suggestion is to replace the diodes with UF4007 to reduce noise.

 

Please refer to the schematic,

There are total of three filter capacitors in its power supply: one 100µF 200V can, one 50µF 400V + 100µF 200V can and one 3X 40µF can.

Are you talking about the 50µF 400V + 100µF 200V can? It is two capacitors inside a can with 4 taps.