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

egerton · 25th Jul 2018, 2:55 pm

Even with no HT to other stages? Also coupling cap. C5 disc. so just R4 500K grid bias in place. That could be the culprit... or R3 cathode perhaps, but shorting grid to deck clears it so suspect R4. Doesn't seem much volume but will test with audio line signal injection.

25th Jul 2018, 2:55 pm	#4
egerton Pentode Join Date: May 2018 Location: Beverley, East Riding Posts: 110	Re: Bestone TRF - power up and audio stage testing Even with no HT to other stages? Also coupling cap. C5 disc. so just R4 500K grid bias in place. That could be the culprit... or R3 cathode perhaps, but shorting grid to deck clears it so suspect R4. Doesn't seem much volume but will test with audio line signal injection.