Just for fun I tested the response of my K3 to external signals with ANT1 directly terminated with a 50-ohm term (no coax). The radio has 2m transverter connections, 6m preamp in/out, and both IF out connections, 10-MHz Ref cable, keys and Inhibit control lines connected to ACC per usual set up.
Using my XG3 is a signal source on 14.020, I get an S3 signal in CW with 0 dBm level, but nothing is heard at -33 dBm. I think this indicates pretty good shielding. I would doubt that external birdies would be heard with ANT terminated. They would have to be very strong, radiating from something in the shack, to be heard. Therefore, making internal birdie survey should work well if you terminate the antenna (use no coax). PS: test with ANT1 open with no cable connected is the same. I did note than if I placed the XG3 antenna over the speaker grill of the K3 I could get a weak signal at -33 dBm. Note: My XG3 is installed in a diecast Hammond box with BNC connector so radiation is only via the BNC connector to a 2m rubber duckie. Using this enclosure with a 20-dB fixed and 30-dB step attenuator I can reduce the XG3 signal to -157 dBm for testing my eme system at the preamp input. 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-60w, 3400-? DUBUS Magazine USA Rep [email protected] ====================================== ______________________________________________________________ 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
