Kenwood KA-3500 wonks out as I turn up volume

[Neil1988]

Hello, new to AK but am caught up in the vintage bug, reliving youth. In two weeks, I've refoamed my old Ohm L's, bought a Kenwood KR-7050, Sherwood 7225b and this KA-3500. So my issue is at low volumes the KA-3500 sounds fine but when I turn up the volume it wonks out and the sound goes dead. I blew the dust out of it, not too bad and sprayed all the POTS(?) but no change. Any thoughts would be appreciated. Love the KR-7050, very cool and it sounds great with the Ohm's. Thanks

 

[rickl]

Neil, welcome to AK and to the Kenwood group.

You might find this 3500 restore interesting. Probably won't help your issue but give you a good idea on how these are designed.

 

[quaddriver]

curious if the outputs are there and its just running on the drivers only...

 

[Neil1988]

Thanks, I will check what i think the outputs are tomorrow based on that link. Looks like it's way over my head at this point, but willing to learn.

 

[rickl]

Neil, hopefully post 12 of the restore link gives you some things to look at and tools needed. I'd probably check dc offset at a minimum. Echowars created a sticky on the solid state forum if you don't know how to do this.

 

[Neil1988]

Thanks guys. Great start, I think I need to go and read up on the basics to understand how these things work. I will follow up with how I am making out. Thx.