[amsat-bb] Antennas for AO-92 23cm

[Patrick STODDARD (WD9EWK/VA7EWK)]

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.pdf

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-Female-Connector-22cm-cable-/161112874419

There is also a smaller 5-element Yagi available on eBay:

https://www.ebay.com/itm/1-2GHz-Stainless-Steel-5-Elements-CCTV-Wireless-transmitter-Yagi-Antenna-SMA-M/321386720435
?

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 at 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
>
>