[amsat-bb] L-BAND

["Rick Vidmar - K9KK" <k9kk@xxxxxxxxxxxxx>]

John
I am using a pair of M2 23CM22EZ antennas circular polarized----18.4 DBIC.
I find that works a little better than linear polarization with the same
antennas.
I am using the DEM 2318PACK 20 watts saturated and 16 watts out at 1 Db
compression.
Below 18 degrees squint on L1 it works ok for SSB.
Above 18 degrees squint on L1 it starts getting weaker pretty quick.
I have made contacts up to 25 degrees squint but the receive station must be
good.
Since L2 is 5 to 6 Db deafer than L1 it works ok for SSB at squints below 10
degrees.
I have made contacts with it on L2 at squints up to 20 degrees but
it is weak on SSB and the receiving station must have a very good setup.
Hope that helps
73
Rick


----- Original Message -----
From: "John Wilcox" <ns1z@midmaine.com>
To: <amsat-bb@AMSAT.Org>; "Vince Fiscus, KB7ADL" <vlfiscus@mcn.net>; "Roy
Schulz" <VE7BPB@rac.ca>
Sent: Tuesday, July 30, 2002 11:17 PM
Subject: Re: [amsat-bb] AO-40 Schedule Update


Has anyone reports on using the DEM 35 watt L band amp? I was pondering
using this at the antenna, a 55 el Loop yagi. With 10 watts in the shack and
the normal loss of LDF4-50 I should have just about 1 1/2 watts to drive it
putting 35 right at the antenna.

My experience with a '736 is that 10 watts L band in the shack is 'readable'
but not adequate...

----- Original Message -----
From: Roy Schulz <VE7BPB@rac.ca>
To: Vince Fiscus, KB7ADL <vlfiscus@mcn.net>
Sent: Wednesday, July 31, 2002 2:01 AM
Subject: Re: [amsat-bb] AO-40 Schedule Update


> Hi Vince,
>
> I also use a TS790 for my  L-band xmitter, and while I have made contacts
> using 10 watts, I don't think you will be happy with that power level. I
> find that it takes at least 20 watts, at the antennas, to get acceptable
> result under most conditions. And at that level you will still not be as
> strong as you could be on UHF. But, the compensation is that LEILA will
not
> be jumping on you for every little transgression, hi...
>
> Also, as far as not being able to work the VHF uplink if you have a
> downconvertor with a 144 IF output, well, that's not entirely correct. You
> may not be able to do it if you are using only one radio, but if you use a
> second receiver, it's not a problem.I find that with my Transystem
> downconvertor, I don't get any desense at all when I try to use the VS
mode,
> running about 40 watts into a 4 element Yagi on 144 Mhz. I'm using an old
> Kenwood TS-711 as my main receiver for mode S, and just use my TS-790 for
> uplink.
>
> See you on there..
>
> regards,
>
> Roy VE7BPB
> Vancouver
>
>
>
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