[amsat-bb] Looking for users of 2M2CP22 & 436CP42 or similar

[EC4TR Luis]

Hi all
I just bought these two antennas and I want to use them without the 
phaser for circular polarization.

I want to use a switch for H and V in the mast, the idea is to use it 
for terrestrial & satellite with vertical rotor.

I also wanted to know if routing the two coaxial cables along the boom 
until the horizontal crossbeam can affect the radiation diagram etc.

I have consulted with the guys from M2 and they advise to route the 
coaxial cables towards the end of the boom and leave them hanging, but 
that makes the installation very complicated and will cause the boom to 
go awry.

They also tell me about the possibility that VSWR does not match in UHF 
due to the phasing cables.

Have any of you made similar changes with M2 antennas?

This is the email exchanged with them


Hello Jose,

If you route the feedlines down the boom, the gain, pattern and VSWR 
will be degraded.  No metal can run parallel to the elements.  We 
recommend our L-brace kit, http://www.m2inc.com/FGLBKAM so that your 
coax is not hanging.  One L-brace kit is required per antenna.

Additionally, if you remove all of the phasing cables, the VSWR may not 
match the original settings (especially for 70cm).  The antenna elements 
are tuned specifically to counteract any interaction with the phasing 
cables.  You may (or may not) be able to achieve a reasonable match when 
converted to V/H linear polarity.  We have not done any 
engineering/testing in this configuration.

Regards,
*/Robert Brown, KR7O/*
Marketing and Sales


73 Luis
EC4TR
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