UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - How much hum is normal? and valve change DAC90A

johnlees · 7th May 2009, 4:37 pm

There is softly audible hum on my DAC 90A when it's off-station. It does not vary with the volume control and is almost a comforting reassurance that the set is working.

When tuned to any station it is completely inaudible, however, so I'll leave all that's well alone.

7th May 2009, 4:37 pm	#12
johnlees Hexode Join Date: Oct 2004 Location: Cheltenham, Gloucestershire, UK. Posts: 283	Re: How much hum is normal? and valve change DAC90A There is softly audible hum on my DAC 90A when it's off-station. It does not vary with the volume control and is almost a comforting reassurance that the set is working. When tuned to any station it is completely inaudible, however, so I'll leave all that's well alone. __________________ Now that's the kind of Long Wave I like ! (Severn Bore near Gloucester)