Steve Said: >>>MY ISSUE: Even though the HexBeam's 20m VSWR measurements appear quite normal made >>>directly at its shack feedline connector using the 259B meter, they are VERY DIFFERENT when >>>measured through a Delta-4 switch. The GAP antenna's VSWR's are very normal-looking when >>>made through its Delta-4 switch, but the HexBeam and 259B meter are NOT HAPPY with a Delta-4 >>>switch in place. (The HexBeam's Delta-4 switch is actually a separate switch, not the same one the >>>GAP is connected to.)
Steve, Have you swapped the two Delta-4s to see if the problem with the Hexbeam is affected by both switches or just the one originally connected to the Hexbeam. If just one of the switches has the problem, you've isolated the problem. If they both have the problem then something unusual is affecting both switches. Perhaps a current imbalance is on the coax for that antenna and it can not be handled by the switch. I wonder if a current balum made of 50 ferrite beads would help in that case. Or you could coil up the coax at the base of the antenna to made a current balun; six turns 6 inches in diameter is the usual configuration, but you may need more since it is a stubborn case. Sorry I don't know enough to really help you. An antenna switch is a luxury I don't yet have. I still must use the Armstrong method. Regards, Steve, W2MY/5 http://users.ev1.net/~spituch/, Corpus Christi, TX, ELl7 QRP/ARCI 8351, FPQRP 1025, NJQRP 25, QRP-L 269, FISTS 3150, ARS 142, NEQRP 281, NWQRP ??, 10-10 61720, NORCAL 691, K2 #402 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.10.1 - Release Date: 4/20/2005 _______________________________________________ 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
