On 01/08/2012 04:46 PM, Lee K7TJR wrote: > Paul you might want to be careful just shorting the > receiver input. This would also put a short on the > output of your preamp. This would have the preamp > blasted with RF from your TX while trying to feed a > short. My guess would be you could destroy > preamps doing this.
Clarification: Actually what I had in mind was to place the short at the input of the preamp. I want the preamp protected too. My only concern is the preamp might want to oscillate with a short on its input. I don't know whether these low frequency, medium gain preamps are prone to that or whether it would harm anything if they did oscillate. The 25+ dB gain, very low noise figure VHF/UHF preamps I am more used to can get pretty squirrelly with something other than 50 ohms on the input. 73, Paul N1BUG _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
