Hi folks, first thanks to the guys who responded to my previous query on the Z match. Well I built the thing and it works (the one shown on this site http://www4.tpgi.com.au/users/ldbutler/SingleCoilZMatch.htm). But here are some questions for you experts:
I am using a 130 feet end fed wire with a counterpoise (not sure how long it is) and have managed a reasonable match (1.5 or less SWR) on 80/40/30/20. The tuning is very sharp and I will be looking for slow motion drives for the variable caps. My main query is what is the best procedure for finding the match, it's been a bit hit and miss so far. I think the best way is first set both caps for best rx, then with the K1 set for 5W, key the K1 adjust the main tuning cap for max output (measured by my power/swr meter between the K1 and the tuner) , then adjust the other cap for minimum SWR, then back to the main tuning cap for max power and so on................. Have I got this right? I seem to get close with this technique but it doesn't always find the right settings and I spend many minutes trying this and that (and heating up the K1 output!). Also quite often the power and K1 current draw shoots right up (up to 2 amps) and at other times the K1 output seems to drop (is this the K1 protecting itself due to high SWR?). Eventually I will get some vernier drives and make a note of the exact settings but maybe I'm not using the best technique. This is the first tuner I have built so I'm feeling my way a bit. Any hints would be most appreciated. 73's Martin M0KWV K1 #1534 Why not take a look at our Web site? http://www.simoncarves.com ************************************************************************* The information in this email and any attachments may contain privileged and/or confidential information intended solely for the use of the individual or entity to whom it is addressed. If the reader of this email is not the intended addressee, or the employee or agent responsible to deliver it to the addressee, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me by telephone or email and delete all copies immediately. ************************************************************************* _______________________________________________ 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
