[amsat-bb] Re: 25 watt Moonbounce
Tom Clark, K3IO
k3io at verizon.net
Wed Jan 30 15:15:40 PST 2008
Ed, KL7UW noted:
> It would be more significant if the antenna was described. I suspect
> if one used a 1000-foot dish it would be quite easy to do!
I know of a number of QRP, single Yagi QSOs on 2M with W5UN (see
<http://web.wt.net/%7Ew5un/mba2003.jpg> & read the primer at
<http://web.wt.net/%7Ew5un/primer.htm>) and KB8RQ (see
http://www.spasalon.com/kb8rq/). In his primer, W5UN notes
> W5UN has worked a couple of stations who were using a single long boom
> antenna and running less than 50 watts, so it can be done. I made one
> such contact with W2RS who answered my CQ. At the time W2RS was
> running 50 watts into a single Cushcraft 32-19 antenna
Along the line of amateur adventures using big antennas, I'll relate a
few things I have done when using large dishes on EME. By large dishes,
we have twice activated the 140' dish at Greenbank, WV (K8HUH & W3IWI/8
calls used) and we have used an 85' dish near Fairbanks, AK (Calls were
W3IWI/KL7 & KL7RA) on several occasions. Here are some notable QRP
1. From both dishes, I have "kerchunked" myself on 70cm FM using
just a HT.
2. From Fairbanks, I ran 70cm AX.25 packet with a small (probably 10
watt) radio & TNC and managed to have a full, legit QSO with
myself (connect, ack, data packets sent "both" ways, etc.)
3. From Greenbank on 13 cm we set the EME DX record with a ZL who
was using his 1 watt exciter after his PA and Driver burned up.
4. From both locations on 70 cm, I worked a number of stations
running under 50 watts with single yagis.
5. Our 1296 MHz QSO from WV with WB5LUA (now W5LUA) was critical to
his completing a 23 cm WAS.
6. W3IWI/8 managed a 70 cm WAC in under 12 hours (i.e. within a
single calendar day). The streak started with Z25JJ for Africa and
ended with several VK6 QSOs.
So some things are pretty easy when you have a big antenna!
73 de Tom, K3IO (ex W3IWI)
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