I believe the 5 pole filters are made in house at Elecraft and the 8pole filters are sourced to Inrad.
Here's a question - I have a perfectly good Yaesu FT990 and have always wanted a narrow CW filter for its 2nd IF ( The first IF has a "roofing filter" of sorts). Anything between 100Hz and 4/500Hz would be acceptable. The original filter options appear to have been Inrad products, and many web references come back to Inrad. But the well is dry when looking for one. (Anyone out therhave one to sell?) I haven't had a chance to check the 990 manual for IF freq, but am wondering if it is 8215, how difficult could it be to adapt a K3 designed filter to the 990? The 990 filter board has large enough space to do a 2 step with intermediate adapter board. That's something I can handle. Al WA6VNN **************************************Check out AOL's list of 2007's hottest products. (http://money.aol.com/special/hot-products-2007?NCID=aoltop00030000000001) _______________________________________________ Elecraft mailing list Post to: [email protected] 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
