[R-390] R-390A Dead Band

Barry n4buq at knology.net
Sun Nov 14 15:10:37 EST 2010


Correct; however, if the crystal for 14mc is out, then that wouldn't be the only band out, right?

Barry - N4BUQ


 On Sun 14/11/10  1:55 PM , rbethman rbethman at comcast.net sent:
> There is the switch contacts PLUS a 14 Mc crystal.
> 
> So it may NOT be a simply located problem.
> 
> The Mc switch detents "can" be an issue.  There is a hole that allows 
> one to see the "desired" MC, but you must ensure that the detent is 
> actually "dropped" into.
> 
> Bob - N0DGN
> 
> On 11/14/2010 2:35 PM, Barry wrote:
> > Check the large rotary switches in the oscillator? 
> I would think that one dead band would not be a crystal, etc.>
> > Barry - N4BUQ
> >
> >> Hi Folks,
> >> Is there one weak component that can typically be
> held accountable for>> a dead band segment?  My 390A seems to be a fairly
> hot performer, except>> forthe 14 mHz band, which is dead.  Perhaps a
> crystal, or something else?>> Thanks for any hints.
> >> --Ed--
> 
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