[amsat-bb] Re: Preamp advice, pse
mspencer12345 at yahoo.ca
Mon Nov 3 17:09:48 PST 2008
In your application the third order intercept point is probably more important than gain or noise figure. If there is to much gain you can always add an attenuator to the output.
Depending on the quality of the radio you are using a pre amp may or not help in your application.
That said I've been pleased with the UHF ARR gasfet preamps and if I was looking for a VHF one I'd look at ARR as well.
--- On Mon, 11/3/08, ANTHONY JAPHA <tjjapha at earthlink.net> wrote:
From: ANTHONY JAPHA <tjjapha at earthlink.net>
Subject: [amsat-bb] Preamp advice, pse
To: amsat-bb at amsat.org
Received: Monday, November 3, 2008, 6:45 PM
Pse let me have advice on which of the following ARR 2 mtr preamps I should
get: P144VDA: 1.0db nf, 15 db gain; or P144VDG: 0.5db nf, 24db gain.
The preamp will be used primarily for AO-7. I operate only portable in a high
noise environment here in Manhattan. I doubt the nf difference is at all
meaningful in my use. The large difference in gain between the 2 preamps may
not be impt. either, that is the real question. My XCVR is the FT-817. Another
817 is used to transmit, running abt 15-20 watts into a small amp. with an Arrow
split between 2 booms on 2 tripods only abt. 1 ft. from each other.
So what's the verdict?
Tnx and 73,
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