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

Pete_kaye · 26th Feb 2009, 5:28 pm

I have retested heaters with a new battery in DMM and got 5.7V ac this time .With the V3 out I still got 5.7 and the bulbs out.. same.I will retest with ALL valves out soon.
I decided to backtrack and tested the output from the big condensor.Red (reservoir)258 V DC (16MF),Yellow234(16MF),Green170(8MF).Do these seem right?
Next ,I tested the anode voltages .Compared to the figures given in Trader Sheet 1054,they all were ~20 to 40 v down.So were the screen readings.Maybe the electrolytic is tired out and not giving enough volts .Would it still work well on MW with an aerial if this were so?

26th Feb 2009, 5:28 pm	#20
Pete_kaye Octode Join Date: Jun 2005 Location: Sheffield, South Yorkshire, UK. Posts: 1,227	Re: Jonell radio problem. I have retested heaters with a new battery in DMM and got 5.7V ac this time .With the V3 out I still got 5.7 and the bulbs out.. same.I will retest with ALL valves out soon. I decided to backtrack and tested the output from the big condensor.Red (reservoir)258 V DC (16MF),Yellow234(16MF),Green170(8MF).Do these seem right? Next ,I tested the anode voltages .Compared to the figures given in Trader Sheet 1054,they all were ~20 to 40 v down.So were the screen readings.Maybe the electrolytic is tired out and not giving enough volts .Would it still work well on MW with an aerial if this were so?