I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
73 de W4AS Sebastian
Sebastian,
I recently put up roughly 200 feet of wire, end-fed, on the east side of my house to get some kind of HF antenna in the air. I haven't had any trouble at all here copying the 10-meter downlink on my 817 and my 857 from about 20 degrees to 20 degrees without any kind of preamp. It's actually been a pleasant surprise - and a nice bonus to the HF work I can do now.
Those who are regulars here on the board have an idea of some of the goofy things I try just to see what will and won't work the satellites. I've also had contacts on both working FM LEO satellites and on AO-16 transmitting through an eFactor 0-gain omni and listening on the longwire. Of course it's nowhere near as effective as using an antenna designed and intended for satellite work, but that doggone hunk o'wire hears OK. :)
Oh ... and I don't have it hung in a straight line. That would be too easy! It runs from the feedpoint northeast about 60 feet, due east about 70 feet, then back west about 70 feet. When I use it as a satellite-receive antenna, I connect it directly to the receive radio I'm using. No tuner - just 200 feet of wire to capture whatever it can.
I don't know how much help this is, but I thought you should know that consistently receiving AO-7 Mode A is possible without a lot of time and money invested.
73 to all,
Tim -------------- Original message from Sebastian [email protected]: --------------
I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
73 de W4AS Sebastian
Sent via [email protected]. 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
Hi Sebastian, I do a little operating on AO7 mode A, and find it depends. I have 3 usable antennas that work OK on 10: an R5 vertical, a 10M dipole and a 160M inverted L. Usually the L is best on receive, followed by the dipole and the R5 is last. However, for whatever reason, sometimes the order is reversed. As Tim said, even a simple longwire can work just fine.
Jim Bob Buckeye AKA **** Jim Leder**** K8CXM since 1961 IBM retiree since 1999
There are 10 types of people in this world -- those who understand binary and those who don't.
----- Original Message ----- From: "Sebastian" [email protected] To: "AMSAT BB" [email protected] Sent: Sunday, December 07, 2008 3:14 PM Subject: [amsat-bb] AO-7 Mode A Antenna?
I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
73 de W4AS Sebastian
Sent via [email protected]. 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
Crossed dipoles over a reflector.
Sebastian wrote:
I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
73 de W4AS Sebastian
Sent via [email protected]. 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
I agree! Or crossed inverted vees fairly low to the ground.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Nigel Gunn G8IFF/W8IFF Sent: Sunday, December 07, 2008 6:12 PM To: Sebastian Cc: AMSAT BB Subject: [amsat-bb] Re: AO-7 Mode A Antenna?
Crossed dipoles over a reflector.
Sebastian wrote:
I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
73 de W4AS Sebastian
Sent via [email protected]. 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
A full wavelength loop, horizontal at 10 to 12 feet works nice. - Duffey On Dec 7, 2008, at 1:14 PM, Sebastian wrote:
I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
73 de W4AS Sebastian
Sent via [email protected]. 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
-- KK6MC James Duffey Cedar Crest NM
----- Original Message ----- From: "Sebastian" [email protected] To: "AMSAT BB" [email protected] Sent: Sunday, December 07, 2008 9:14 PM Subject: [amsat-bb] AO-7 Mode A Antenna?
I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it.
I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using?
Hi Sebastian, W4AS
Since OSCAR-6 I am using a homebrew 29.5 MHz turnstile i.e two crossed dipoles each with gamma match and a delay line to get RHCP polarization upword. Please note that the polarization of a turnstile is linear horizontal at low angles toward the horizon. Both crossed dipoles are horizontally mounted over my terrace at about 1/4 wave over the flat surface of it and hopefully the iron casted into the prestressed concrete act as a reflector. In a separate email I have sent to you a draving and a picture of it.
I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp?
About the use of a preamplifier on 10 meters this matter has been discussed several time on the Amsat-BB as in my letter "Re:Preamp advice, pse" sent november 04 ,2008
73 de W4AS Sebastian
73" de
i8CVS Domenico
participants (7)
-
Gary "Joe" Mayfield -
i8cvs -
James Duffey -
Jim Leder -
n3tl＠bellsouth.net -
Nigel Gunn G8IFF/W8IFF -
Sebastian