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

egerton · 26th Jul 2018, 6:38 pm

I connected the HT up to the RF and detector valves and powered up. I was pleasantly surprised that I could tune in to no less than 5 stations on MW - after I connected the external long wire aerial! Volume control is somewhat strange but perhaps typical of a TRF? Everything seems to happens in the last 75% of the pots travel... suddenly starts detecting and volume goes from min to max. so quite sensitive. LW doesn't work though so still work to do. When the waveband switch is in the open position the set 'motorboats' if i turn the volume down it stops but no stations heard. Something is wrong with the coil switching and circuit arrangement for LW. But overall a pleasing result and I can't help wondering how long since this set has been receiving a station seeing as it had a 2 pin UK plug on and a resistive cable dropper! Paul

26th Jul 2018, 6:38 pm	#8
egerton Pentode Join Date: May 2018 Location: Beverley, East Riding Posts: 110	Re: Bestone TRF - power up and audio stage testing I connected the HT up to the RF and detector valves and powered up. I was pleasantly surprised that I could tune in to no less than 5 stations on MW - after I connected the external long wire aerial! Volume control is somewhat strange but perhaps typical of a TRF? Everything seems to happens in the last 75% of the pots travel... suddenly starts detecting and volume goes from min to max. so quite sensitive. LW doesn't work though so still work to do. When the waveband switch is in the open position the set 'motorboats' if i turn the volume down it stops but no stations heard. Something is wrong with the coil switching and circuit arrangement for LW. But overall a pleasing result and I can't help wondering how long since this set has been receiving a station seeing as it had a 2 pin UK plug on and a resistive cable dropper! Paul