UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - FRG-7 Quiet hum

Keith · 18th Jul 2019, 6:13 pm

Hi Antony,

I have an FRG7 and have never noticed a hum. I almost always use it on the loudspeaker though so it maybe only a problem on headphones. I guess one option would be to use lower sensitivity headphones or load the existing ones with a resistor. You would then need to increase the audio gain but the hum level should be reduced.

18th Jul 2019, 6:13 pm	#2
Keith Heptode Join Date: Jan 2003 Location: Tewkesbury, Gloucestershire, UK. Posts: 693	Re: FRG-7 Quiet hum Hi Antony, I have an FRG7 and have never noticed a hum. I almost always use it on the loudspeaker though so it maybe only a problem on headphones. I guess one option would be to use lower sensitivity headphones or load the existing ones with a resistor. You would then need to increase the audio gain but the hum level should be reduced. __________________ Keith Yates - G3XGW VMARS & BVWS member http://www.tibblestone.com/oldradios/Old_Radios.htm