[amsat-bb] Re: ao-51 mode L/S

Luc Leblanc lucleblanc6 at videotron.ca
Thu Nov 13 12:42:33 PST 2008

On 13 Nov 2008 at 11:01, Eric Fort wrote:

> Are those who are working AO-51 mode L/S mostly using rotors and tracking
> software?  What are you using to keep the antennas pointed for mode L/S and
> what are you using for antennas?
> Eric
Hi eric here is my setup

On 2.4GHZ
Vagi Series WiMAX Directional Antenna
2500 to 2700 MHz Operation.....She seems to perform not too badly at 2.4!
o Compact, Low Profile 16 dBi Antenna Gain Kind of double row yagi!!! very odd design
o Lower cost compared to other 16dBi Gain Antennas 70$+-
o Very Low Wind Loading. Aesthetic design
o QuikClamp Bracket for 1.0" to 1.5" Pole Diameter
o 45 Deg tilt and 360 Deg rotation adjustments
o Vertical or Horizontal Polarization
o 30" Pigtail with Type N Female or N Male Connector
o Rugged, Lightweight and Waterproof

On L band

25 elem loop yagi from Directive system with about 18W at the antenna.

I have orbitron tracking in azimuth and i manually control the elevation

I finally found a way to fully doppler control the doppler on both uplink and downlink using 2 programs as HRD does not work with my Yaesu
FT-847 one of the first put on the market with the one way CAT system.

I am in a learning process with the PC assisted doppler control and i will try to implement doppler control on S and L band but i will have
to tweak and play with the IF'S on the downconverter and transverter...and this will not an easy task!

BTW manual doppler adjustment is possible on S/L mode but it's like a circus juggler you have to get some practice but when you became
familiar with the process you can have a full pass QSO.


Luc Leblanc VE2DWE
Skype VE2DWE

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