[amsat-bb] Re: Compact Quadrifilar Helix antenna
On Wed, Dec 30, 2009 at 4:15 PM, Edward Cole wrote: > At 09:14 AM 12/30/2009, Andrew Glasbrenner wrote: >>Jeff Kelly wrote: >> > This antenna has been out for a while: >> > >> > >> http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.html >> > >> > any feedback on it? >> > >> > Jeff >> > KT2K >> > ___ >> > Sent via amsat...@amsat.org. Opinions expressed are those of the author. >> > Not an AMSAT-NA member? Join now to support the amateur satellite program! >> > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >> > >> > >>Works OK with a good preamp. I have one mounted on my Explorer with some >>magnets from Harbor Freight, and an ARR preamp. Lots of guys here in >>deed-restricted communes, err, communities use them because of their >>stealth qualities. >> >>73, Drew KO4MA A practical alternative is to build the QFH from the recent QST article. I have just finished one of these, and it seems to work reasonably. As luck would have it, I just posted notes on the process on my blog at http://ve9qrp.blogspot.com This is the RHCP version provided in the article. I found the downlink from VO-52 to be rather more weak than, say a vertical or dipole. I attribute this to the difference in circular polarity. I, too, am interested in switched circularly polarized omnidirectional antennas. I think I might make a AA2TX lindenblad for the corresponding LHCP unit. Does anyone have recommendations for RF switches suited for 2m work and N-connectors? > > If you like building antennas, you might look at the Lindenblad which > performs similarly. I am finishing up my dual-band pair and may get > them installed, today: > http://www.kl7uw.com/LBant.htm > > I will fill in more info on this page in a day or two (just a few photos, now) > > > 73, Ed - KL7UW, WD2XSH/45 > == > BP40IQ 500 KHz - 10-GHz www.kl7uw.com > 500-KHz/CW, 144-MHz EME, 1296-MHz EME > DUBUS Magazine USA Rep dubus...@hotmail.com > == > > ___ > Sent via amsat...@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > -- http://ve9qrp.blogspot.com ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Compact Quadrifilar Helix antenna
At 09:14 AM 12/30/2009, Andrew Glasbrenner wrote: >Jeff Kelly wrote: > > This antenna has been out for a while: > > > > > http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.html > > > > any feedback on it? > > > > Jeff > > KT2K > > ___ > > Sent via amsat...@amsat.org. Opinions expressed are those of the author. > > Not an AMSAT-NA member? Join now to support the amateur satellite program! > > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > > > >Works OK with a good preamp. I have one mounted on my Explorer with some >magnets from Harbor Freight, and an ARR preamp. Lots of guys here in >deed-restricted communes, err, communities use them because of their >stealth qualities. > >73, Drew KO4MA >___ >Sent via amsat...@amsat.org. Opinions expressed are those of the author. >Not an AMSAT-NA member? Join now to support the amateur satellite program! >Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb If you like building antennas, you might look at the Lindenblad which performs similarly. I am finishing up my dual-band pair and may get them installed, today: http://www.kl7uw.com/LBant.htm I will fill in more info on this page in a day or two (just a few photos, now) 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com 500-KHz/CW, 144-MHz EME, 1296-MHz EME DUBUS Magazine USA Rep dubus...@hotmail.com == ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Compact Quadrifilar Helix antenna
Preferably with 50R N type connectors. Whilst weatherproof, good quality PL259s are available, most dealers don't stock them and thay are NOT 50 Ohm. On 30-Dec-09 19:50, David Wing wrote: > > Another option is to build a relay switch as described here: > > http://www.kb0nly.net/ant%20switch.html ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Compact Quadrifilar Helix antenna
Ron, I recently put up some crossed yagis with the ability to switch from RHCP to LHCP and I cannot recommend strongly enough that it is a real advantage to be able to do this. Note that you would not T-Connect antennas with differing polarity...you want to be able to switch between them. You could do that with an antenna switch, either remote up near the antennas or in the shack...of course in the shack means you have to run two feedlines. Another option is to build a relay switch as described here: http://www.kb0nly.net/ant%20switch.html 73, David K6CDW -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of rnut...@networkref.com Sent: Wednesday, December 30, 2009 11:32 AM To: jmfranke; amsat-bb-boun...@amsat.org; Andrew Glasbrenner; Jeff Kelly Cc: amsat-bb Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna Which one should I get or should I order both and put a T connector between them ? Ron KA4KYI --Original Message-- From: jmfranke Sender: amsat-bb-boun...@amsat.org To: Andrew Glasbrenner To: Jeff Kelly Cc: amsat-bb Sent: Dec 30, 2009 12:30 PM Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna I have both the RHCP and LHCP receiver versions, but with a house move, I have not had the opportunity to test them. John WA4WDL -- From: "Andrew Glasbrenner" Sent: Wednesday, December 30, 2009 1:14 PM To: "Jeff Kelly" Cc: "amsat-bb" Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna > Jeff Kelly wrote: >> This antenna has been out for a while: >> >> http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.htm l >> >> any feedback on it? >> >> Jeff >> KT2K >> ___ >> Sent via amsat...@amsat.org. Opinions expressed are those of the author. >> Not an AMSAT-NA member? Join now to support the amateur satellite >> program! >> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >> >> > Works OK with a good preamp. I have one mounted on my Explorer with some > magnets from Harbor Freight, and an ARR preamp. Lots of guys here in > deed-restricted communes, err, communities use them because of their > stealth qualities. > > 73, Drew KO4MA > ___ > Sent via amsat...@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb Sent from my BlackBerryR wireless device ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Compact Quadrifilar Helix antenna
Which one should I get or should I order both and put a T connector between them ? Ron KA4KYI --Original Message-- From: jmfranke Sender: amsat-bb-boun...@amsat.org To: Andrew Glasbrenner To: Jeff Kelly Cc: amsat-bb Sent: Dec 30, 2009 12:30 PM Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna I have both the RHCP and LHCP receiver versions, but with a house move, I have not had the opportunity to test them. John WA4WDL -- From: "Andrew Glasbrenner" Sent: Wednesday, December 30, 2009 1:14 PM To: "Jeff Kelly" Cc: "amsat-bb" Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna > Jeff Kelly wrote: >> This antenna has been out for a while: >> >> http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.html >> >> any feedback on it? >> >> Jeff >> KT2K >> ___ >> Sent via amsat...@amsat.org. Opinions expressed are those of the author. >> Not an AMSAT-NA member? Join now to support the amateur satellite >> program! >> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >> >> > Works OK with a good preamp. I have one mounted on my Explorer with some > magnets from Harbor Freight, and an ARR preamp. Lots of guys here in > deed-restricted communes, err, communities use them because of their > stealth qualities. > > 73, Drew KO4MA > ___ > Sent via amsat...@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb Sent from my BlackBerry® wireless device ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Compact Quadrifilar Helix antenna
I have both the RHCP and LHCP receiver versions, but with a house move, I have not had the opportunity to test them. John WA4WDL -- From: "Andrew Glasbrenner" Sent: Wednesday, December 30, 2009 1:14 PM To: "Jeff Kelly" Cc: "amsat-bb" Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna > Jeff Kelly wrote: >> This antenna has been out for a while: >> >> http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.html >> >> any feedback on it? >> >> Jeff >> KT2K >> ___ >> Sent via amsat...@amsat.org. Opinions expressed are those of the author. >> Not an AMSAT-NA member? Join now to support the amateur satellite >> program! >> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >> >> > Works OK with a good preamp. I have one mounted on my Explorer with some > magnets from Harbor Freight, and an ARR preamp. Lots of guys here in > deed-restricted communes, err, communities use them because of their > stealth qualities. > > 73, Drew KO4MA > ___ > Sent via amsat...@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Compact Quadrifilar Helix antenna
Jeff Kelly wrote: > This antenna has been out for a while: > > http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.html > > any feedback on it? > > Jeff > KT2K > ___ > Sent via amsat...@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > Works OK with a good preamp. I have one mounted on my Explorer with some magnets from Harbor Freight, and an ARR preamp. Lots of guys here in deed-restricted communes, err, communities use them because of their stealth qualities. 73, Drew KO4MA ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
