[amsat-bb] 70cm LNA

[Paul Stoetzer]

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 <
amsat-bb at amsat.org> 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.
>
> --- Zach
> N0ZGO
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