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Old 12th Oct 2019, 1:36 pm   #93
Luxman1050
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Join Date: Apr 2019
Location: Margate, Kent, UK.
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Default Re: Philips BX281U20 valve radio

Okay measurements pins 1&8
Rectifier pin 3 bang on 220vac

UBL 21
Chassis readings pin 1 90vac pin 8 24vac. Should be 55v.
Measurment across both pins 65vac so should be 110v? is that correct?

UCH21
Chasis readings pin 1 116vac pin 2 90vac. Should be 20v seems well out of spec.
Measurement across both pins 92vac so should be 40v? Is that correct? So again if so well out of spec.

No readings on pins 1&8 on 2nd UCH21 is that correct?

Interesting when touching pin 8 which goes to voltage selector unit goes lovely and quiet with just a slight hum?

So these readings seem a bit off or not?

I've put in a NOS UCH21 in today.

Cheers Chris
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