Ed There's a more reliable way of doing this. Turn on the dBV measurement facility on the K3 and turn off the agc, reduce rf gain a bit. Arrange for 50ohm resistor noise to indicate 0dB and then substitute the 6m antenna and see the difference.
BTW the preamps won't be "below a 290K source" - they're already at 290K or more! 73 Graham > With both preamps on S=4 > Both preamps on with antenna disconnected; S=3 > So its a pretty quiet area with only one s-unit rise in noise. > For comparison with a 50-ohm termination both preamps see S=4 > This indicates the preamps are low-noise below a 290K source. > ______________________________________________________________ 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
