[amsat-bb] Re: AO-16 Downlink

w4upd w4upd at bristor-assoc.com
Sun Jan 27 13:01:22 PST 2008

Double sideband would be AM except that the carrier is greatly reduced. 
You can still hear a little bit of carrier on AO-16 and helps with the 
tuning in during doppler. I find that upper SSB works the best for me 
whatever reason. This last pass was only 11 degrees, but I used my 
homebrew 2-meter ground plane and it did a better job of getting into 
the bird than the high-gain Ringer Ranger vertical. This would be 
expected for higher elevations, but still worked well for the low one as 

I plan on trying to get my old 30 degree slopper 70 cm ground plane I 
made some time ago for the down link and see how it does. Right now I am 
using a dual band gain vertical. I suspect the results will be similar 
to the 2-meter ground plane. This is one of those times when it seems 
simple is good or better.

What a party line when trying to listen to AO-16, hi!!

Reid, W4UPD

Clint Bradford wrote:
>  >>...Mode FM Voice Repeater (Downlink is double sideband.)
> Hmmm...Isn't "double sideband" AM? Amplitude modulation of a carrier  
> wave normally results in two mirror-image sidebands...
> How should I program my FT-817 for the downlink?
> Embarassingly yours,
> Clint, K6LCS
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