Halson radio - UK Vintage Radio Repair and Restoration Discussion Forum

vinrads · 4th Dec 2020, 10:51 am

This is my latest acquisition a bit of a wreck well a lot of a wreck, after fitting a new rectifier and 25L6 the set worked just, so I replaced all the usual capacitors, bridged one of the smoothing caps temporary, had it working OK but I noticed a what sounded like a noisy resistor, shorting the 220k anode load to deck cured the problem but the noise was still there after replacing the 220k, to cut a long story short, the fault was a 500pF, RF filtering capacitor leaky, nice one.

4th Dec 2020, 10:51 am	#1
vinrads Dekatron Join Date: Feb 2009 Location: Chesterfield, Derbyshire, UK. Posts: 3,763	Halson radio This is my latest acquisition a bit of a wreck well a lot of a wreck, after fitting a new rectifier and 25L6 the set worked just, so I replaced all the usual capacitors, bridged one of the smoothing caps temporary, had it working OK but I noticed a what sounded like a noisy resistor, shorting the 220k anode load to deck cured the problem but the noise was still there after replacing the 220k, to cut a long story short, the fault was a 500pF, RF filtering capacitor leaky, nice one. Attached Thumbnails Last edited by vinrads; 4th Dec 2020 at 11:14 am.