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

theredhouseinn · 26th Nov 2019, 10:16 am

Many thanks for all the tips guys.

My friend, a radio ham across the road lent me his 6J5 form his AR88, and a spare glass GT type, no change, still the same fault. TheGTt showed low emission on the MHSVT, but still worked in the set.

I hard wired the coil and tuning cap to the valve base missing out the switch, fault still there, switch OK. As the fault only occurs on the top 3 bands, the only common part left is the tuning cap. HF section.

I am now going to try replacing the tuning cap with a selection of fixed caps across the range, this should eliminate this part. I will also try a small var. cap, on order, when it arrives.

If I have missed anything, please keep shouting.

John.

26th Nov 2019, 10:16 am	#22
theredhouseinn Hexode Join Date: Jan 2013 Location: Kelvedon, Essex, UK. Posts: 273	Re: RCA AR88D Comms Receiver. Many thanks for all the tips guys. My friend, a radio ham across the road lent me his 6J5 form his AR88, and a spare glass GT type, no change, still the same fault. TheGTt showed low emission on the MHSVT, but still worked in the set. I hard wired the coil and tuning cap to the valve base missing out the switch, fault still there, switch OK. As the fault only occurs on the top 3 bands, the only common part left is the tuning cap. HF section. I am now going to try replacing the tuning cap with a selection of fixed caps across the range, this should eliminate this part. I will also try a small var. cap, on order, when it arrives. If I have missed anything, please keep shouting. John.