[R-390] Newbie needs help

[Dan Merz]

Hi, agc problem was my first thought since BC band signals are usually very strong. Can you tame the problem by setting function switch to mgc, manual gain control, and see if reducing rf gain helps?  Can you tune in a weak broadcast band signal and see if distortion is reduced?  Also, is your indoor antenna just a wire connected to set such that the front end tuning by the antenna trimmer has no effect in peaking a signal?  Maybe you have a nearby strong BC signal that is causing the problem because it isn't adequately rejected. Dan 

Sent from my iPad

> On Oct 4, 2013, at 10:05 PM, Mike Bracey <mikebracey at att.net> wrote:
> 
> I need some direction from the gurus please. My 390a works fine in every respect except for distorted audio on the broadcast band. All other bands are fine. It is the same no matter what the settings on RF or AF gain. Bandwidth has no effect. All tubes check good. It's hooked up to a 40' inside long wire antenna. Could someone point me in the right direction?
>  
> Thanks,
>  
> Mike, KE5YTV
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