[amsat-bb] Receiving with an rtl-sdr, desense on transmit

Koos van den Hout koos at kzdoos.xs4all.nl
Mon May 1 12:46:46 UTC 2017

Quoting Eduardo PY2RN who wrote on Sun 2017-04-30 at 20:26:

> Hi Koos, I suggest not using preamp since the RTL-SDR has way too much gain already, unless your preamp is narrow band (has a built in pass-band filter, ie: 144 -148MHz) it may be useful as a filter, but in any case you need to adjust manually RTL-SDR AGC to a minimum necessary gain. AO-85 uplink freq 435.180 ST 67.0hz, dwlink 145.980.

Thanks for your suggestions.

The preamp is wide band, so the solution is to find a filter.

The 2m/70cm filter that I already have is the diplexer in the arrow
antenna. I'll retry my tests using that.

                                   Koos van den Hout PE4KH

Koos van den Hout                          Homepage: http://idefix.net/
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