[TowerTalk] M2 40M3L Tuning

[Tim Wininger]

Thanks to all for the info. I have some confidence now about setting
up the 40M3L and tower adjustment.

TNX again, Tim - KT4TX


On Mon, Oct 14, 2013 at 7:58 AM, Larry <lknain at nc.rr.com> wrote:

> I have a M2 4030M4L. The loading wires for the elements came to an
> aluminum bar. They used Phillystran from the bar to an aluminum riser above
> the boom. Initially the Phillystran was just clamped in the bar as a "U"
> but that would "eat up" the Phillystran. Later they had some small round
> probably Lexan pieces that you put on the outside of the aluminum bar to
> wrap the Phillystran "U" around so the edges of the aluminum bar did not
> cut into the Phillystran. Not sure if that applies to 40M3L and if that is
> what you fixed Ed. I found it on my antenna before it was even off the
> ground fortunately.
>
> 73 Larry  W6NWS
>
> -----Original Message----- From: Edward Sawyer
> Sent: Monday, October 14, 2013 6:31 AM
> To: towertalk at contesting.com ; ky5rtim at gmail.com
> Subject: Re: [TowerTalk] M2 40M3L Tuning
>
>
> I have a 40M3L vintage 2005.  It is at 80 ft with a 10M 6 el underneath by
> 10 ft.  The nearest tower is 140 ft away.
>
>
>
> I found the measurements to be "in the ball park" but not exact.  However I
> got reasonable resonance points by raising it up 35 ft to the first guy
> point of the tower - just don't worry about the SWR, look for the resonance
> X=0 line.  It went uo in frequency by about 20khz at 80 ft.  Mine is tuned
> to 7080 and I have 1.6 SWR at 7.000 and 2.0 SWR at 7.210.  Like most 40 M
> shortened beams, it climbs pretty quickly after that and is about 3.1 at
> the
> top of the band.  Plus the gain is dropping off.  But for contesting and
> DXing CW + SSB, this is a good spot for tuning.
>
>
>
> It is a very potent antenna on the bands and a very solidly built antenna
> with one exception (if they haven't fixed it).  The connection of the cross
> bar of the tuning wire to the post on the boom.  The method breaks after a
> few years.  I redesigned mine to eliminate the pinch point that eventually
> snapped.  Not a fun repair in the air.
>
>
>
> 73
>
>
>
> Ed  N1UR
>
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