I have a kenwood TM-733.
This radio is nice because it is full duplex cross-band, but I am having issues trying to figure out how to use it with satellites.
The problem is that I will have to switch between bands and change each frequency when adjusting for doppler, and I can't find a simple solution with channels because doing an odd split channel only seems to split between VHF - VHF or UHF - UHF not V-U.
Even if that would work, it would not be full duplex.
Is there any solution using this radio for FM sats???
I can't speak for that particular radio, but I will share my experience with the Kenwood TM-V7A, TM-D700, and TM-D710. I used them all on SO-50, AO-27, SO-67, AO-51.
I could not find any method to setup a memory channel linking both VFO's and allowing full-duplex. However, I didn't ever find it necessary. Changing VFO's is as simple as pushing a knob on the radio or button on the mic pad.
For the V/U birds, I would simply tune for best reception on the downlink band VFO, then switch back to the uplink band VFO for PTT.
For the upcoming U/V birds, it should be a reverse of the above process.
73 Clayton W5PFG
On 9/21/2015 12:40, Skyler F wrote:
I have a kenwood TM-733.
This radio is nice because it is full duplex cross-band, but I am having issues trying to figure out how to use it with satellites.
The problem is that I will have to switch between bands and change each frequency when adjusting for doppler, and I can't find a simple solution with channels because doing an odd split channel only seems to split between VHF - VHF or UHF - UHF not V-U.
Even if that would work, it would not be full duplex.
Is there any solution using this radio for FM sats???
Skyler,
It looks like it may be sufficiently similar to my TM-V7A to comment.
The TM-V7A, like most Kenwood rigs does not allow you to store cross-band in the memories. Assuming a mode J satellite such as SO-50 and the new LilacSat-2, I store a single VHF memory with PL tone as needed for TX, and then the usual 5 UHF memories for RX to allow for Doppler. Start with the highest RX frequency for AOS, and then work down. The only tricky thing is to remember to switch PTT to the UHF side so you can change the frequency, and then immediately switch back to the VHF side to TX. For that matter, you can use the VFO rather than MR and accomplish the same thing, but using the memories saves my fading memory, and reduces the chances of messing things up in the heat of battle.
73s,
Alan WA4SCA
<-----Original Message----- <From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Skyler F <Sent: Monday, September 21, 2015 12:41 PM <To: amsat-bb@amsat.org <Subject: [amsat-bb] Kenwood TM-733 for FM sats < <I have a kenwood TM-733. < <This radio is nice because it is full duplex cross-band, but I am having <issues trying to figure out how to use it with satellites. < <The problem is that I will have to switch between bands and change each <frequency when adjusting for doppler, and I can't find a simple solution <with channels because doing an odd split channel only seems to split <between VHF - VHF or UHF - UHF not V-U. < <Even if that would work, it would not be full duplex. < <Is there any solution using this radio for FM sats??? < <-- <Skyler Fennell <amsatnet.info <KD?WHB <electricity440@gmail.com <_______________________________________________ <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 (3)
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Alan -
Clayton W5PFG -
Skyler F