[amsat-bb] Re: Mode B equipment for eagle (fwd)

John B. Stephensen kd6ozh at comcast.net
Wed Sep 20 07:38:34 PDT 2006

Yes, existing mode B gear will work. 1 kW EIRP (25 W into a 16 dBic gain 
antenna) is a good uplink power level.



----- Original Message ----- 
From: "McGrane" <tmcgrane at suffolk.lib.ny.us>
To: "Amsat BB" <amsat-bb at amsat.org>
Sent: Wednesday, September 20, 2006 13:38 UTC
Subject: [amsat-bb] Mode B equipment for eagle (fwd)

> Greetings- considering the recent discussion regarding Eagle modes, I
> thought I would repost this question for any answers. Will I be able to
> use traditional SSB gear for Eagle mode B?
> I have recently combined an Azimuth rotator and a cheap TV rotator for
> elevation adjustments using short beams but can upgrade the antennas
> later.
> Thanks in advance for any replies, pat n2oeq
> ---------- Forwarded message ----------
> Date: Sat, 9 Sep 2006 07:46:45 -0400 (EDT)
> From: McGrane <tmcgrane at suffolk.lib.ny.us>
> To: Amsat BB <amsat-bb at amsat.org>
> Subject: Mode B equipment for eagle
> Greetings
> In the past couple of years, I have set up a very cheap satellite station
> for mode B. I had a 2 meter all-mode mobile rig (FT480R) I paid 50 dollars
> for connected to a cushcraft 4 element Yagi beam. I purchased a 70
> centimeter FT790RII for $125 and made a homebrew 8 element Yagi.
> Antennas are monted on single azimuth rotator mast and angled up about 10
> degrees. This setup works extremely well for hamsat (VO-52).
> Now, going from LEO hamsat to HEO Eagle, I will probably have to make a
> longer UHF yagi and add an amplifier, Also a longer VHF beam. I already
> have a mirage 2 meter amp with built in preamp. If the coax is short as it
> is now, I can use the amp's preamp.
> I saw a reference in one of the flurry of emails mentioning a 1KW ERP SSB
> station for eagle. Right now, for UHF, I'm at about 250 watts ERP. Either
> adding an amp or making a new antenna will bring me up to 1KW ERP or more.
> Am I on the right path?
> Will I be able to add to this equipment to work Eagle or will something
> totally new be required for mode B ?
> Thanks for ideas, Patrick N2OEQ
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