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Ambientnoise · 6th Jun 2020, 11:47 am

If the noise is unaffected by the volume control, it surely must be from the audio amplifier and not the IF section.

6th Jun 2020, 11:47 am	#3
Ambientnoise Heptode Join Date: Feb 2006 Location: Marlborough, Wiltshire, UK. Posts: 917	Re: HACKER VHF "Herald" RP37A If the noise is unaffected by the volume control, it surely must be from the audio amplifier and not the IF section.