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Paul, N8HM, successfully worked AO-92 L-band with an Alinco DJ-G7T handheld transceiver, with 1 watt, fed into a 16 element 23cm yagi (Comet CYA-1216e). The 1-watt HT had no problem getting into the tested 15-degree AO-92 pass. The only issue with the Alinco is with RX filtering. While it is a full-duplex capable HT, N8HM reported he had to use a separate receiver to be able to hear his downlink. The SG Lab 1296-144 transverter puts out 2 watts @ 12vdc and 2.5 watts at 13.8vdc. This would give you twice as much output power as the HT. The SG Lab transverter comes set up to work at 1296 MHz. You must open it up and switch some jumpers to be able to operate at the required 1267 MHz. Wyatt, AC0RA, switched the jumpers and successfully tested his SG Lab transverter @ 1267 on a non-satellite, terrestrial contact. Either of the above two options (HT or transverter) will get you started on AO-92, but don't just focus on power. Frequency steps are just as important. 5 KHz (or smaller) step is best, 10 is workable with some fading between steps, 25 kHz (although not tested yet) will likely be problematic. FYI - I have the Alinco DJ-G7T, SG Labs 1296-144 transverter, Kenwood TM-942, and Icom IC-910H, along with a Comet CYA-1216e yagi and Directive Systems 2314 loop yagi. Will start testing/comparing once AO-92 is switched over to L-band (L/v) operations. 73, Robert KE4AL On Tuesday, January 30, 2018, 5:14:55 PM CST, D. Craig Fox [email protected] wrote:
I too am struggling with how to get RF out on 1.2ghz. Right now Im leaning toward the SG-Labs 1296 transverter (1296/144) which I think someone mentioned sometime back. Many positive reviews on moon-net. If you have any interest in local repeaters or EME on 1296, along with activating AO92 via L band, for $198 PNP, this is hard to beat. http://www.sg-lab.com/TR1300/tr1300.html
73s, Craig
N6RSX
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Brad Brooks Sent: Tuesday, January 30, 2018 12:41 PM To: [email protected] Subject: Re: [amsat-bb] Potential 23cm FM transmitter
Good day to all. Related to my previous post, please check this link for an interesting NBFM transceiver board for L-band uplinks:
http://www.pe1jpd.nl/index.php/23cm_nbfm/
Now I just need to find time!
73 Brad WF7T EM66
On Jan 26, 2018, 1:43 PM -0600, Brad Brooks [email protected], wrote:
For those who receive the DKARS magazine, there is a very interesting article. The transceiver described is for ATV, but it looks like like it will tune to the AO-92 uplink frequency. Seems to put out 400mw FM out. I am not able to take time now to review deeper (stealing away from work) but I look forward to parsing through the schematic/links this weekend. I am forwarding this notice for anyone who will be able to get there sooner. I think there is some potential here, and I would like to know other’ opinions.
Www.dkars.nl
73 Brad WF7T Nashville TN EM66
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(If this message is spam, please report it to IT Dept. Thank you.) _______________________________________________ Sent via [email protected]. 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