I am building a BC-Band Energy-Reject Filter as described in the 1990 ARRL Handbook and February 1978 QST for an old SW receiver. This filter, designed by Ed Wetherhold, N3NQN, offers about 60 db of rejection of BC band signals yet will still pass 160 meter signals with an insertion loss of only 0.8 dB.
I would like to use the same latching relays that Elecraft uses in the K2 to switch the filter in and out. I wonder what the isolation is for these relays at MF/HF frequencies. The relays used by Elecraft (Omron G6HU-2) are DPDT and a single relay could switch both input and output, but I am concerned that the isolation between the input and output would be comprised by the proximity of the input and output connections and contacts. I could also use one relay at the input side of the filter and another relay at the output side of the filter which should have better isolation. Please email me your comments. Thanks! -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
