[R-390] Antenna Trimmer

[David Wise]

Yep, should be half-mesh with the knob straight up.  That way 90 degrees left is
full open (or full closed, doesn't matter), and 90 degrees right is full closed
(or full open).  This way, the scale covers the whole trim range.

In use, you should see two peaks, one on-scale above the horizontal axis,
the other the same amount below the horizontal axis and on the same side of
the vertical axis.  That's a way to check for correct knob position without
inspecting the capacitor.

Dave Wise
SWL in Hillsboro Oregon

>-----Original Message-----
>From: r-390-bounces at mailman.qth.net 
>[mailto:r-390-bounces at mailman.qth.net] On Behalf Of Tom Frobase
>Sent: Tuesday, November 06, 2012 8:59 AM
>To: Steve Hobensack
>Cc: r390 reflector
>Subject: Re: [R-390] Antenna Trimmer
>
>that has always been my procedure ... tom, N3LLL
>
>On Nov 6, 2012, at 10:00 AM, Steve Hobensack 
><stevehobensack at hotmail.com> wrote:
>
>> 
>> Before aligning the front end, should the antenna trimmer 
>cap be set to half mesh, then the knob be remounted to the 
>zero numeral? I always get two peaks and they are usually in 
>the numerical scale on the front panel. I am thinking my unit 
>isn't adjusted correctly even though it doesn't seem to 
>matter. Souldn't the other peak be out of the number scale?
>> Steve N8YE                         
>> _____________