It looks like they may have re-designed it since I got mine about 7 years ago, but my 70cm receive only preamp is a High Sierra Microwave LNAA432, which has a 2 pole SAW filter on the output. It works very well here in my urban environment (Washington, DC).
http://www.hsmicrowave.com/Amateur%20LNA.html
73,
Paul, N8HM
On Wed, Aug 12, 2020 at 3:37 PM Zach Metzinger via AMSAT-BB < [email protected]> wrote:
On 08/12/20 14:26, Kevin Elliott wrote:
Not wanting to use this with a transceiver, mostly just for my 70cm QFH
with SDR for satnogs. Aware of any other 70cm and 2m LNAs that perform well for receive-only?
Hello Kevin,
I've heard good things about LNA4ALL (https://lna4all.blogspot.com/), which has a high IIP3 and low NF.
The +33dBm IIP3 would help with overload issues on the LNA itself, but the high gain (+23dB) would then overload your SDR/rig with those, now amplified, high-power out-of-band signals.
If you added an appropriate filter, such as the one I used, to the output, then you'd have a good solution.
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