Got a pile of gear in to clean, repair, upgrade, restore.
Was just finishing the Kenwood KA-6000. Recapped all E-caps except main monster filter cap. Had all the boards done. Changed all the 2SC871 in there. There were bad ones on the amp and noisy ones everywhere else. Dropped in KSC1845.
Everything was fine. Went for the main coupling caps, restuffed them, fine, good.
Hit the smaller mounted caps, restuffed them. and then bop-bop-bop.
Double checked the work, twice. Yup, fine.
About a 1-2hz popping.
I can get it to stop by engaging the low filter.
While not surging, I checked the center voltage and current draw setting and dialed that all in perfectly.
Separating the pre-amp and amp stops the cycle. Each appears to work fine while separated.
SO, what?
First time I've hit this.
Any hints, tips, tricks? Places to look? Things to check?
Oh, both sides seem to be effected but more on the right than left.
????
Was just finishing the Kenwood KA-6000. Recapped all E-caps except main monster filter cap. Had all the boards done. Changed all the 2SC871 in there. There were bad ones on the amp and noisy ones everywhere else. Dropped in KSC1845.
Everything was fine. Went for the main coupling caps, restuffed them, fine, good.
Hit the smaller mounted caps, restuffed them. and then bop-bop-bop.
Double checked the work, twice. Yup, fine.
About a 1-2hz popping.
I can get it to stop by engaging the low filter.
While not surging, I checked the center voltage and current draw setting and dialed that all in perfectly.
Separating the pre-amp and amp stops the cycle. Each appears to work fine while separated.
SO, what?
First time I've hit this.
Any hints, tips, tricks? Places to look? Things to check?
Oh, both sides seem to be effected but more on the right than left.
????