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Old 22nd Jul 2017, 6:16 pm   #22
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 3,758
Default Re: Kolster Brandes RV 10 (Crown)

The EHT rectifier (U26) heater winding is just a couple of turns round the line output transformer core in most cases. It has a very low DC resistance. So with the set unplugged and the CRT discharged, measure the resistance between the heater pin contacts in the U26 holder (valve removed). If it's open then there's a problem with the heater winding.

I don't know about this set (vintage TV is not my 'thing') but it's not unheard-of for there to be a low-ish value resistor in series with the rectifier heater winding. It's often hidden in the the rectifer socket housing. It can go open-circuit.
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