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Old 7th Dec 2017, 10:11 am   #15
kalee20
Dekatron
 
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,059
Default Re: DAC 90A Smoothing Capacitor replacement

Welcome to the DAC90a world!

You may even find the big electrolytics are fine. If you've had the radio switched on, and they haven't exploded or got hot, they won't be leaky. So, the only other thing is that they could be low capacitance.

If you get your new electrolytics, just tack them across the existing can terminals and try it. If the hum is vastly reduced, then yes the originals are shot. But if there's not much difference, then the originals will be quite serviceable, and the hum is coming from elsewhere!

You've got the capacitors to replace the waxed originals, that's brilliant. There is one which MUST be replaced (between the UBC41 and the UL41), but you're on the case anyway!

Looking forward to news, with interest!
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