[amsat-bb] Re: AMSAT-BB Digest, Vol 5, Issue 458
Bob DeVarney W1ICW
w1icw at myfairpoint.net
Fri Nov 19 19:08:55 PST 2010
Regarding SSB preamps:
I have had both an SP-2000 and SP-7000 in nearly continuous use here in
Vermont since 1990. I cannot find any fault with either unit. Both have
worked FLAWLESSLY the entire time. Both have been out in the extremes of
temperature northern Vermont gets. Some slight discoloration from the
sun of the housings. The 2 meter one is not quite so red any more, and
the 432 one a paler shade of blue, but that is all.
The ARR preamps are excellent as well, but limit you to 160 watts. For
most people running a typical satellite station, that would be fine. But
if you also want to run V/UHF terrestrial, that may not be enough power
handling for you.
With a proper sequencer, the SP-2000 will handle 750 watts, and SP-7000
will handle 500, and SSB offers a 1.5 kW 2 meter model for a real
You get what you pay for.
SSB preamps are excellent in all respects for satellite work. I even
made my first ten 2 meter EME QSOs with the SP-2000.
I had considered using one for my permanent two meter EME station as
well, but ended up using a receive only preamp and doing dual feedlines,
one for tx and one for rx.
73, Bob W1ICW
Light travels faster than the speed of sound, this is why some people tend to appear bright, until they decide to speak.
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