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

DMcMahon · 20th Oct 2020, 11:59 pm

Started investigating Post 53.

Visually found another resistor that looked somewhat cooked (sure it looked OK before) a large 10kOhm (1/4 watt according to parts list) connected to the output side of the 470 Ohm and feeding HT supply down to the Screen grid of the EL 84 output pentode. Even though the 10k looks cooked it measures OK.

Started rechecking all the previous component replacements in case I had done something incorrect, but nothing untoward found so far. After the previous batch of component replacements, I had thoroughly checked all the voltages and everything basically measured OK, it was only after putting the power supply and amplifier back into the case that the problem at Post 53 occurred.

20th Oct 2020, 11:59 pm	#58
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,600	Re: Brenell Purchases Started investigating Post 53. Visually found another resistor that looked somewhat cooked (sure it looked OK before) a large 10kOhm (1/4 watt according to parts list) connected to the output side of the 470 Ohm and feeding HT supply down to the Screen grid of the EL 84 output pentode. Even though the 10k looks cooked it measures OK. Started rechecking all the previous component replacements in case I had done something incorrect, but nothing untoward found so far. After the previous batch of component replacements, I had thoroughly checked all the voltages and everything basically measured OK, it was only after putting the power supply and amplifier back into the case that the problem at Post 53 occurred.