I would like to try this mode using a K5GNA downconverter. The problem is I am using an FT-736R and apparently you can not have Xmit and Rcv on same band in satellite mode. I am using SATPC-32 for doppler control. The downconverter uses a 2m IF. Anyone else with an FT-736R have this worked out?
Many thanks!!
73, Al W8KHP
Hi Allen,
If you have both Rx and Tx on the same band, then both directions will be using the same RF connector on the rig. I suppose if you are REALLY careful you can put an antenna switch between them, but you need to make really sure you don't transmit into the back of your downconverter. And since you won't be able to hear yourself, this arrangement is probably only going to work in FM mode.
I've done VS with my FT-736R, but my 13cm receive is through a separate rig (an all-mode scanner). I also modified my downconverter for a 300mhz IF so that I wouldn't have any interference regardless of the uplink (2m/70cm). The 736 was only used for the uplink.
Good luck,
Greg KO6TH
From: tokens@myranch.com To: amsat-bb@amsat.org Date: Sat, 8 Aug 2009 13:48:24 -0400 Subject: [amsat-bb] AO-51 V/S mode
I would like to try this mode using a K5GNA downconverter. The problem is I am using an FT-736R and apparently you can not have Xmit and Rcv on same band in satellite mode. I am using SATPC-32 for doppler control. The downconverter uses a 2m IF. Anyone else with an FT-736R have this worked out?
Many thanks!!
73, Al W8KHP _______________________________________________ Sent via AMSAT-BB@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
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Hi Greg,
Guess I'll feed the downconverter into my FT-817ND and see if I can get things going that way with SATPC controlling doppler on both rigs..
Many thanks!
Al W8KHP ----- Original Message ----- From: Greg D. To: tokens@myranch.com ; amsat-bb@amsat.org Sent: Saturday, August 08, 2009 2:09 PM Subject: RE: [amsat-bb] AO-51 V/S mode
Hi Allen,
If you have both Rx and Tx on the same band, then both directions will be using the same RF connector on the rig. I suppose if you are REALLY careful you can put an antenna switch between them, but you need to make really sure you don't transmit into the back of your downconverter. And since you won't be able to hear yourself, this arrangement is probably only going to work in FM mode.
I've done VS with my FT-736R, but my 13cm receive is through a separate rig (an all-mode scanner). I also modified my downconverter for a 300mhz IF so that I wouldn't have any interference regardless of the uplink (2m/70cm). The 736 was only used for the uplink.
Good luck,
Greg KO6TH
From: tokens@myranch.com To: amsat-bb@amsat.org Date: Sat, 8 Aug 2009 13:48:24 -0400 Subject: [amsat-bb] AO-51 V/S mode
I would like to try this mode using a K5GNA downconverter. The problem is I am using an FT-736R and apparently you can not have Xmit and Rcv on same band in satellite mode. I am using SATPC-32 for doppler control. The downconverter uses a 2m IF. Anyone else with an FT-736R have this worked out?
Many thanks!!
73, Al W8KHP _______________________________________________ Sent via AMSAT-BB@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
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That should work, though being on the same band for Tx and Rx (after conversion) may still net you some interference. Keep the rigs separated and you might get away with it.
I don't have automatic doppler correction on my 13cm receive side right now. The receiver is an ICOM IC-R7000, which does have computer control, but my software doesn't know how to talk to it. (My fault - I wrote it!) So I get by with computers running the rotors and the uplink, and I do the downlink by hand. It gets pretty hairy at times (around TCA), but especially on FM I can manage. So, if you can't coax SatPC to run both rigs, all is not lost.
Good luck!
Greg KO6TH
From: tokens@myranch.com To: ko6th_greg@hotmail.com; amsat-bb@amsat.org Subject: Re: [amsat-bb] AO-51 V/S mode Date: Sat, 8 Aug 2009 15:34:09 -0400
Hi Greg,
Guess I'll feed the downconverter into my FT-817ND and see if I can get things going that way with SATPC controlling doppler on both rigs..
Many thanks!
Al W8KHP
----- Original Message ----- From: Greg D. To: tokens@myranch.com ; amsat-bb@amsat.org Sent: Saturday, August 08, 2009 2:09 PM Subject: RE: [amsat-bb] AO-51 V/S mode
Hi Allen,
If you have both Rx and Tx on the same band, then both directions will be using the same RF connector on the rig. I suppose if you are REALLY careful you can put an antenna switch between them, but you need to make really sure you don't transmit into the back of your downconverter. And since you won't be able to hear yourself, this arrangement is probably only going to work in FM mode.
I've done VS with my FT-736R, but my 13cm receive is through a separate rig (an all-mode scanner). I also modified my downconverter for a 300mhz IF so that I wouldn't have any interference regardless of the uplink (2m/70cm). The 736 was only used for the uplink.
Good luck,
Greg KO6TH
From: tokens@myranch.com To:
amsat-bb@amsat.org
Date: Sat, 8 Aug 2009 13:48:24 -0400
Subject: [amsat-bb] AO-51 V/S mode
I would like to try this
mode using a K5GNA downconverter. The problem is I am using an FT-736R and apparently you can not have Xmit and Rcv on same band in satellite mode. I am using SATPC-32 for doppler control. The downconverter uses a 2m IF. Anyone else with an FT-736R have this worked out?
Many
thanks!!
73, Al W8KHP
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Hi Allen,
No, I don't have it worked out using the FT-736 for both V and S, but I do use my FT-817 for uplink since the doppler on V is negligible and 5W to the yagis is quite enough to hit AO-51. Then I leave it to the FT-736 for the downconverter on the 2m side, with doppler control from SatPC32.
Jerry N0JY
Allen Vinegar wrote:
I would like to try this mode using a K5GNA downconverter. The problem is I am using an FT-736R and apparently you can not have Xmit and Rcv on same band in satellite mode. I am using SATPC-32 for doppler control. The downconverter uses a 2m IF. Anyone else with an FT-736R have this worked out?
Many thanks!!
73, Al W8KHP _______________________________________________ Sent via AMSAT-BB@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
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Thanks for the many suggestion both on and off line. Hopefully I will be on for the coming week of V/S.
Al W8KHP
participants (3)
-
Allen Vinegar -
Greg D. -
N0JY