M2 70cm Cross Yagis on LHCP
Dear All,
We are trying to setup determine how to setup the M2 436CP42UG & 436CP30 antennas for fixed LHCP polarity. However the manual only provides instructions for RHCP.
Tried to Google this up but failed to find any information too. Any pointers or advice will be greatly appreciate.
Thank you.
73, Sion, 9M2CQC
A friend of mine discovered that M2 actually has polarity reversers for their CP 2m and 70cm antennas. They are several hundred USD, but you might look at the manual to get a hint at how they do it. I'm guessing it might be reversing which elements have the delay line, in fact it's probably a different delay line since the horizontal and vertical elements are a bit offset from each other. Hope this helps.
On Sun, Oct 14, 2018 at 10:38 PM, Sion Chow Q. C. (9M2CQC) 9w2qc@9w2qc.net wrote:
Dear All,
We are trying to setup determine how to setup the M2 436CP42UG & 436CP30 antennas for fixed LHCP polarity. However the manual only provides instructions for RHCP.
Tried to Google this up but failed to find any information too. Any pointers or advice will be greatly appreciate.
Thank you.
73, Sion, 9M2CQC
Sent via AMSAT-BB@amsat.org. 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
EMAIL M2, I have found that they are happy to answer questions.
On Mon, Oct 15, 2018 at 6:45 AM Burns Fisher burns@fisher.cc wrote:
A friend of mine discovered that M2 actually has polarity reversers for their CP 2m and 70cm antennas. They are several hundred USD, but you might look at the manual to get a hint at how they do it. I'm guessing it might be reversing which elements have the delay line, in fact it's probably a different delay line since the horizontal and vertical elements are a bit offset from each other. Hope this helps.
On Sun, Oct 14, 2018 at 10:38 PM, Sion Chow Q. C. (9M2CQC) < 9w2qc@9w2qc.net> wrote:
Dear All,
We are trying to setup determine how to setup the M2 436CP42UG & 436CP30 antennas for fixed LHCP polarity. However the manual only provides instructions for RHCP.
Tried to Google this up but failed to find any information too. Any pointers or advice will be greatly appreciate.
Thank you.
73, Sion, 9M2CQC
Sent via AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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
Hello Sion
it is easier then you think, i made it also with a relay as M² does, i use a Tohtsu 120 coax relay on 1 off the 2 directors. Just switching the CENTER conductor at 1 director changes the polarisation; without a relay, just turn 1 dipole opposite so the center conductor is on the other side of the boom,this gives the other polarisation; you can buy a switch from M², but very pricy for +-1m alu element, 1 relay in a alu box i made myself that switches, and works FB; i also made a 4pol switch for 2m and 70cm with 4 cx-120 types per box, but on 70cm i gonna change them into 4 SMA relays i found on a hamfest, they have less loss.
best 73's
Jerry
----- Oorspronkelijk bericht ----- Van: "Sion" 9w2qc@9w2qc.net Aan: "amsat-bb" amsat-bb@amsat.org Verzonden: Maandag 15 oktober 2018 04:38:02 Onderwerp: [amsat-bb] M2 70cm Cross Yagis on LHCP
Dear All,
We are trying to setup determine how to setup the M2 436CP42UG & 436CP30 antennas for fixed LHCP polarity. However the manual only provides instructions for RHCP.
Tried to Google this up but failed to find any information too. Any pointers or advice will be greatly appreciate.
Thank you.
73, Sion, 9M2CQC
_______________________________________________ Sent via AMSAT-BB@amsat.org. 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
Jerry,
Definitely they switch one of the driver element per the WEB site explanation as you explained.
However, I am curious to know how you do so with one Tohtsu 120 coax relay which is a one pole 2 way switch as both the outer screen and the inner connector of the coax has to be switched.
Could you please share, if possible post a sketch on the WEB?
73
Jean Marc (3B8DU)
On Oct 15, 2018, at 9:00 PM, jerry.tuyls@telenet.be wrote:
Hello Sion
it is easier then you think, i made it also with a relay as M² does, i use a Tohtsu 120 coax relay on 1 off the 2 directors. Just switching the CENTER conductor at 1 director changes the polarisation; without a relay, just turn 1 dipole opposite so the center conductor is on the other side of the boom,this gives the other polarisation; you can buy a switch from M², but very pricy for +-1m alu element, 1 relay in a alu box i made myself that switches, and works FB; i also made a 4pol switch for 2m and 70cm with 4 cx-120 types per box, but on 70cm i gonna change them into 4 SMA relays i found on a hamfest, they have less loss.
best 73's
Jerry
----- Oorspronkelijk bericht ----- Van: "Sion" 9w2qc@9w2qc.net Aan: "amsat-bb" amsat-bb@amsat.org Verzonden: Maandag 15 oktober 2018 04:38:02 Onderwerp: [amsat-bb] M2 70cm Cross Yagis on LHCP
Dear All,
We are trying to setup determine how to setup the M2 436CP42UG & 436CP30 antennas for fixed LHCP polarity. However the manual only provides instructions for RHCP.
Tried to Google this up but failed to find any information too. Any pointers or advice will be greatly appreciate.
Thank you.
73, Sion, 9M2CQC
Sent via AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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 (5)
-
Burns Fisher -
H. Stephen Nipper -
Jean Marc Momple -
jerry.tuyls＠telenet.be -
Sion Chow Q. C. (9M2CQC)