You are going to run into serious trouble if you live near high power transmitters, especially FM. The front end of the RTL-SDR has poor large signal handling capabilities.

Bob N4HY

On Thu, Dec 29, 2022 at 5:08 PM James Hickox via AMSAT-BB < amsat-bb@amsat.org> wrote:

Hello. After many years away, I am beginning to get a shack ready to start using the satellites again.

This time, I cannot go with the best hardware and will.need to do some compromises.

I played with the SDR dongles awhile back and used one of the $20 wideband preamps.

My question: if I were to set the preamp up with a diplexer as an input filter and 50 ohm terminations for protection along with the proper relays, could this preamp be useful if mounted near the antenna feed point?

I cannot seem to find out any comparisons or testing against other homebrew or commercial units.

Thanks and 73, James, AA5AO

---

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org