10-07-2017, 03:08 PM
In this case I'd be doing a bulk replacement too Jeffrey.
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Callins electrolytics
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10-07-2017, 04:06 PM
If you have very large numbers of caps to do, what about batch changing the caps? Power up between batches (of half a dozen at a time?) and see if a fault has emerged. Might make inadvertent fault-introduction easier to trace.
Not something I have had to do, I'll admit, but might be worth considering
Jeremy. G8MLK. BVWS Chairman. British Vintage Wireless and TV Museum Friend.
Pamphonic Website ______________ BTTT OB Truck Restoration
11-07-2017, 10:17 AM
Started on the frame and sound PCB.
Not only are there loads of Callins but a sprinkling of bead tantalums too. I'm not trusting any of them either. Not sure why they needed to go to the expense of tants in any of the locations I've looked at so far. Also found a few "special tolerance" electrolytics. So far: 5.6uF 25V 20%, 50uF 40V -10% + 20% and 25uF 25V -10% +20%. If they're Callins they'll get ordinary decent electrolytics. If they're Mullard they might stay for now. If the performance is a bit off I'll AOT the values.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
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