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Re: Questions about operating F0-20 & 29


I already have my 2m M2 egg-beater up and the 70cm with preamp will go up
this afternoon if no rain. I'm using my FT-847, so I hope to see you over
the weekend. My egg-beaters are on separate poles, about 15 or 20' apart, so
I may have to put my 70cm cavity filter or 70cm bandpass filter in line to
get away from desense, et al. Anywho, if things go well, I should be ready
this evening sometime. 73

...hasan, N0AN

----- Original Message -----
From: "Wayne Day N5WD" <n5wd@earthlink.net>
To: <rover@wireco.net>; <amsat-bb@AMSAT.Org>
Sent: Thursday, May 09, 2002 10:58 PM
Subject: Re: [amsat-bb] Questions about operating F0-20 & 29

> On Thu, 9 May 2002 15:28:54 -0400, Greg KB4NVD/R wrote:
> >I have a few questions about what it is like to operate mode JA
> >on FO-20 & 29:
> >What kind of antennas will I need for TX and RX? Will omni's be
> >sufficient?
> Yes, you can use omni's.  I'm using a pair of the M-squared Eggbeaters
> for up and downlink to the FO sats with pretty good success.  The
> limiting factor will be hearing yourself - I'm usually not quite as
> loud as the other stations in the QSO, but can most often hear my
> own downlink enough to tell that I'm on frequency. Adding a software
> doppler correction program (I use the W6IHG Radio Tuner for the
> Kenwood TS-2000 now) helps.. or you can use one of the hardware
> solutions.  Trying to tune for doppler and move antennas manually
> would drive someone crazy, quickly.. those birds move fast!
> >What is the dopler like and how do I tune for it on a JA transponder?
> The doppler on 435 is a killer.. most folks set their transmitter and
> tune the receiver on the FO sats.  I've got the ability  (with the
> and the computer controlled doppler correction) to keep the apparent
> downlink frequency stable using uplink and downlink correction, but I've
> not heard anyone else that does that on the FO birds.
> >How well are the satellites working right now?
> They work quite well most of the time. Some short (10-30 sec) fades, but
> quite often there's only a couple of folks on the satellite.
> >Is there many people on and what about some DX stuff like Carribean
> >islands, South American stations, VE, etc?
> See above. Nope, not a lot of DX on the FO sats that I've heard. They're
> within range, but not too many people on them.
> >My background is that of a VHF rover and an old timer RS-10 Mode
> >A operator. I have available for this project; KNWD TR-751 2m 25w
> >TR-851 430 radios, ARR preamp for 435.
> >If possible, I want to keep my antennas simple so I can take this show
> >on the road and operate portable from various grids.
> That's certainly do-able. Mount the eggbeaters as far away from each other
> as you can and take off... should work well, as long as you've got very
> decent ears (add a good preamp to the 435mHz redeive chain... you'll be
> very glad you did)... and 100w omni up should give you more than enough
> signal into the satellites.
> Good luck and see you on FO20 & FO29!
> 73 Wayne N5WD
> ---------------------------------------------------------
> R. Wayne Day, Licensed Paramedic  Fort Worth, Texas, USA
>      n5wd@earthlink.net      rday@northwest.k12.tx.us
> Health Science Technology Instructor/Clinical Coordinator
>       Northwest High School, Justin,Texas  Go Texans!
> -------------------- 73 de N5WD -------------------------
> ----
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