Harry, I am jealous of that you are in the Oscar 100 footprint, and I am not. However, I do run the low orbit satellites and wanted to tell you about my station real quick. I am using a SDRPLAY RSP1a for the down-link signal, an FT-857d for the uplink, and SDRConsole for tracking, doppler rig control.. etc. Simon at SDRconsole has upgraded his software lately and you might take a look at it. Many people are using it for Oscar 100. Finally, my antenna is a ELK dualband Log periodic, fixed elevation at 20 degrees and Az is controlled by a small rotor. I do well into the linear and FM birds over NA. I was trying to figure out a way to implement that Broadband RF Amplifier you sent me into my ground station. 73, have fun on your ground station. - WB0WQS - Kelly Ellison. Missouri USA.