[R-390] Scratchy Static

rbethman rbethman at comcast.net
Sun Sep 11 16:31:08 EDT 2011


Steve,

I found the 2W, either R-601 or R-605 had gone south - and - the 6AK6 
had apparently shorted.

That is the area I'd start looking first.

It happened on my '67 EAC when I still had it.

Bob - N0DGN

On 9/11/2011 3:42 PM, Steve Hobensack wrote:
> After my 63 Imperial warms up, there is a low level scratching in the speaker. It is there when the local gain and rf gain control is all the way down. I have isolated the problem to the audio deck, specifically the 5814 audio driver tube to the 6ak6 local gain audio output. It is not present on the line gain side of the circuitry. Before I begin clipping and testing, is there a troublesome component that others have found? The problem is still there after tube substitution.
> Steve N8YE 		 	   		
>


More information about the R-390 mailing list