[pskmail] IS0GRB-4 new freq (40m 7035KHz pskfreq)
- From: "Roberto IS0GRB" <is0grb@xxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Mon, 5 Jan 2009 09:59:00 +0100
Hi to all.
I have updated the wiki with a new frequency of is0grb-4.
The server now work on 40m 7035Khz (central pskfreq) (vfo 7036
lsb) (PSK250).
Power output is about 80W, antenna is a collinear 2 element, polarization
orizontal, 40m total length (10meters+10meters+20meters), direction north
europe.
Between the part of 10m and 20m there is a coaxial stub of 1/4 wave x 0.66
(rg-213), where in the end the central of the cable is solded with the
ground.
With the stub the 2 element are phased and we are the maximum irradiation of
this antenna. it is possible to add others 1/2 collinear elements and
increment the gain.
With this 2 element the gain tested is about 4dB.
|----------------dipole---------------------| -----------collinear
part------------|
1/4 wave (40m) 1/4 wave (40m) 1/2 wave (40m)
-------------------- | ----------------------- |
-----------------------------------------
| |
| coaxial stub 1/4 x 0.66
|
cable of rg-213 to the radio
1/4 wave = 71 / 7.035
1/2 wave = 142 / 7.035
stub = 300 / 7.035 x 0.66 (for rg-213)
Reports of reception are appreciated.
Best 73 and happy 2009.
Roberto IS0GRB
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