[amsat-bb] Re: Advice on antennas for working the LEO's
David - M0ZLB
m0zlb at btinternet.com
Wed Feb 21 04:00:29 PST 2007
Hi Gary, welcome to the world of satellites.
Don't get too bogged down initially with antenna issues. Although I have
the directional beams, pre-amps, rotators, controls etc - none of it is
in the air at present and I work the LEO's with a single 2m/70cm
collinear at about 40'. A very good friend of mine, David G8OQW also
uses the same set up so if you need any help (if I am qualified to give
any!), then please e-mail me off list!
With this config I can work VO-52 and FO-29 very successfully and AO-51
sometimes - its actually more of a challenge working them that way! Of
course the ISS (when its operational) is a doddle with this antenna.
You are right, the Arrow handheld is not available from any UK retailers
but if you have a word with Jim Heck of AMSAT - UK, he could probably
help you out if he has any or put you on the waiting list for one. I
bring back a dozen or so for him when I return from the US and may be
coming back with some in March.
Gary McKelvie wrote:
> Hi to the List,
> My names Gary, I'm just getting started in the sats, initially
> looking to work the LEO's with FO 29 in particular.
> The station is going to consist of a Yaesu FT 847 cat controlled by
> Ham Radio Delux to control the radio for Doppler.
> It's suitable antennas that I have a problem with from web pages etc
> a lot of people seem to use the arrow antenna,
> which unfortunately as far as I can see is not available here in the UK.
> There is an antenna by Tonna which is a 9 element on 2 and 19 element
> on 70 claimed gain is 13 dBi on 2 16 dBi on 70.
> The feed line I will be using to get to the antenna will be a short
> run of West Flex 103 (which is half the loss of RG 213)
> I'm hoping to avoid the use of pre amps if possible as getting power
> to them is a problem.
> This antenna set up will be temporary in nature, with it being set up
> each time it is in use.
> I will be able to rotate the antenna in azimuth by hand or using a
> azimuth rotator.
> So would this setup work?
> So really all I'm not sure is how effective this setup will be and am
> looking for ideas and suggestions.
> Gary G7USC
> Gary McKelvie
> Web : www.garym.org.uk
> Mobile : +447968501863
> MSN Messenger : gm7usc at hotmail.com
> So Long and Thanks for all the Fish
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