UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Tractorfan · 2nd Sep 2017, 6:12 pm

Hi,
I finally got round to metering the motor and it seems to check out OK. I'm now wondering if there's an iffy transistor on one of the phases. I've got a few AC128s which should work in place of the AC122s. I hope it's not one of the AC188s which are inside an small aluminium block heat sink.
I'll scope the outputs again to see what's happening.
Cheers, Pete.

2nd Sep 2017, 6:12 pm	#15
Tractorfan Dekatron Join Date: Mar 2008 Location: St. Frajou, l'Isle en Dodon, Haute Garonne, France.(Previously: Ellesmere Port, Cheshire, UK.) Posts: 3,184	Re: Old Uher 4000 motor problem. Hi, I finally got round to metering the motor and it seems to check out OK. I'm now wondering if there's an iffy transistor on one of the phases. I've got a few AC128s which should work in place of the AC122s. I hope it's not one of the AC188s which are inside an small aluminium block heat sink. I'll scope the outputs again to see what's happening. Cheers, Pete. __________________ "Hello?, Yes, I'm on the train, I might lose the signal soon as we're just going into a tunn..."