Looking for users of 2M2CP22 & 436CP42 or similar
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
Hi Luis. I have use 2M2CP22 antenna as H and V with coax for each polarization routed towards the end of the boom. I have change F-type connectors on the each dipole to the N-type. Antenna was connected to the external polarization switch box, all system was works GOOD, have many sat and EME QSOs. If U do not need CP antenna why U bought it and not 2MXP22.
GL with ur project.
de 4z5cp
------ Original Message ------ From: "EC4TR Luis" [email protected] To: [email protected] Sent: 31.07.2018 11:53:06 Subject: [amsat-bb] Looking for users of 2M2CP22 & 436CP42 or similar
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 -- https://www.qrz.com/db/ec4tr https://www.facebook.com/ECfourTR https://twitter.com/EC4TR?lang=es _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hi Dimitry
Thanks for info, I decided in those antennas because I bought it at very good price in the Italian M2 dealer and never thought before that it were so expecials, the 2MXP22 are a good choice but to much long for my project, I want to work SSB contest and satellite. 73 Luis EC4TR
El mar., 31 jul. 2018 a las 13:28, Dimitry Borzenko ([email protected]) escribió:
Hi Luis. I have use 2M2CP22 antenna as H and V with coax for each polarization routed towards the end of the boom. I have change F-type connectors on the each dipole to the N-type. Antenna was connected to the external polarization switch box, all system was works GOOD, have many sat and EME QSOs. If U do not need CP antenna why U bought it and not 2MXP22.
GL with ur project.
de 4z5cp
------ Original Message ------ From: "EC4TR Luis" [email protected] To: [email protected] Sent: 31.07.2018 11:53:06 Subject: [amsat-bb] Looking for users of 2M2CP22 & 436CP42 or similar
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 -- https://www.qrz.com/db/ec4tr https://www.facebook.com/ECfourTR https://twitter.com/EC4TR?lang=es _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (2)
-
Dimitry Borzenko -
EC4TR Luis