Ron,
There has been a wide variety of antennas used for AO-92's 1.2 GHz uplink. Some are using a 16-element Comet CYA-1216E sold in various ham stores:
http://www.cometantenna.com/wp-content/uploads/2013/09/CYA-1216E-inst-sheet....
Others have gone with Yagis from China via eBay. The 10-element Yagi has been popular:
https://www.ebay.com/itm/1-2GHz-12DBi-GSM-Yagi-Directional-Antenna-1200MHz-N...
There is also a smaller 5-element Yagi available on eBay:
https://www.ebay.com/itm/1-2GHz-Stainless-Steel-5-Elements-CCTV-Wireless-tra... ?
Some are using other larger Yagis, and K5ND has used a 23cm helix:
https://www.k5nd.net/2018/04/satellite-qso-l-band-ao-92/
If you want to build a Yagi, there are WA5VJB designs for smaller (4 to 10 elements):
http://www.n5dux.com/ham/files/pdf/D-STAR%20Antennas.pdf
Or for something larger:
http://wa5vjb.com/references/LBand-Yagis-for-AMSAT.pdf
Most of the time on the L/V passes, I'm using a 5-element Comet CY-1205 Yagi sitting on top of my Alinco DJ-G7T. Between the 1W from the HT and this Yagi, which was sold in the late 1980s and into the 1990s, I have done OK with AO-92 L/V. I have also used the 10-element Yagi from eBay with my DJ-G7T.
As for power, for those using HTs like the DJ-G7T or an older HT like the Icom IC-T81A, the power level is 1W. With a mobile radio or the larger satellite-ready transceivers, 10W. There may be some who have more than 10W going out to the antennas on 1.2 GHz.
A good discussion about working AO-92's L/V mode has been taking place on a thread in QRZ's satellite forum. Once you get through the first part of the thread, you can see this discussion, along with pictures.
https://forums.qrz.com/index.php?threads/wheres-ao-92.614536/
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Mon, Oct 8, 2018 at 2:42 PM Ronald G. Parsons w5rkn@w5rkn.com wrote:
What antennas are being used for AO-92 23cm? Is polarization changing a problem. How much uplink power is required?
Ron W5RKN