Ken, Maybe I'm missing something, but I would expect the noise floor to drop on a receiving antenna - assuming the RX antenna is a lower noise antenna than the transmit antenna - you are looking at the atmospheric noise and not the receiver noise floor.
73, Don W3FPR On 4/17/2011 3:21 PM, Ken Roberson wrote: > Wayne, > > While working 160M DX last winter I noticed that when I > Switch from RX antenna (Beverage) and back to TX antenna > That the base line (Noise floor) on the P3 was about 2 S unites > Less than when I changes to the RX antenna. > > With the default antenna ( TX antenna ) PreAmp = off and ATT = ON > Switch to RX antenna (with the preamp off) turn the preamp on and switch back > to normal antenna. > Now if you switch the preamp on and off, the base line will return to normal. > Hard for me to explain. > > Thanks Ken K5DNL > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
