Hello, Ed!
Thanks for your reply! If I had my satellite station in a proper ham shack, where the radios are inside and antennas are outside (or the antennas are not within a few feet or a couple of meters of the radios), it is possible that the house or building may be enough to keep the transmitter from affecting the RTL-SDR dongles. I don't have that option for working satellites, even when I am at home. My antenna is always within a few feet or a couple of meters of my radios, both transmit and receive. Putting the dongle in a case with some shielding, and maybe adding some filters in front of the dongle, could make that work in my situation. Between the time and money needed to do that, I think I'm doing fine when I use a FUNcube Dongle Pro+ or SDRplay. In fact, whenever I move to a place where I can install a proper satellite station in the house, with antennas outside and the radios inside, I know my existing SDR receivers (FUNcube Dongle Pro+ and SDRplay) should work fine in that environment as they have when I've worked portable.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK
On Thu, Jun 16, 2016 at 11:08 PM, Eduardo PY2RN py2rn@arrl.net wrote:
The cheap RTL dongles are as much sensible (or more) than the others more expensive.Lack of filtering is the big issue although there are some practical and easy workarounds to improve it.For ham satellites downlink frequency stability should not be an big issue, there are some models already been sold with 0.5PPM TCXO option which are still cheap.It is a great opportunity to operate full-duplex on amateur satellites with very low investment and improving operational capabilities. EME (Moon bounce) audible signal RX comparison between TS-2000 / RTL / FunCube Pro+ can be seen here: https://youtu.be/3OxyO5ylwfs
73 ED PY2RN