For operating as WD2XSH/45 on 495.6 KHz, I connect thru the KVX3A Tx and Rx terminals, and run in "TEST" mode so I bypass the HP filter to get good sensitivity below 600-KHz. I added a Clifton-Labs BC Band filter to suppress BC stations on the lower end from spattering down into 500-KHz (essentially raising the noise floor).
73, Ed - KL7UW & WD2XSH/45 (FCC experimental license) ------------------------------ Message: 40 Date: Mon, 15 Nov 2010 15:55:48 -0800 From: Wayne Burdick <[email protected]> Subject: Re: [Elecraft] Fwd: FT5000 PIN Diodes To: Karl Marderian <[email protected]> Cc: "[email protected]" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Hi Karl, I think there are a few issues to clear up here. ----snip--- First, we incorporated a high-pass filter into the T/R switch. It rolls off signals below 1 MHz to ensure that extremely strong signals in the 500 kHz range or below are attenuated. The attenuation at 500 kHz is about 20-25 dB. This is not a problem for casual broadcast band DXing. However, we also provide a way around the T/R switch: the RX ANT IN jack on the KXV3 or KXV3A module. Most broadcast-band enthusiasts connect their low-band receiving antenna directly to RX ANT IN, bypassing the high-pass filter. If you still have a particular station that's a problem, you could use an external notch filter in line with RX ANT IN. 73, Wayne N6KR 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-800*w, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep [email protected] ====================================== *temp not in service ______________________________________________________________ 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
