On Wed, 13 Apr 2005 16:56:50 -0400, Roy Morris wrote: >I have come up with what I think is a better mod for grounding >the mike connector
The ONLY good place to connect the shield of the mic cable is to the chassis of the K2. I have modified one of my K2's to do this, and will do the other one (newly acquired) soon. When you connect the shield to the circuit board and from there go to the chassis, you set up what we in the pro audio world know as a "pin 1 problem." You can find a tutorial on this as part of AES48, an international standard that I helped write. At www.aes.org, go to Standards, then Standards in print, and then select AES48. Anyone can download a pdf of the standard at no charge. If you are not an AES (Audio Engineering Society) member, you won't be able to print the pdf, but you can read it on your screen. You can buy a printable copy for $25. BTW, the chassis is also the "right" place to connect the signal return of RS232 connections, NOT pin 5. I've solved some serious RFI problems by correcting this. This is a tutorial on the topic. http://audiosystemsgroup.com/FerritesRFI-HamPPT.pdf There are other tutorials on the website that you may find helpful. http://audiosystemsgroup.com/publish.htm Jim Brown K9YC _______________________________________________ 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
