I recently put up a K6STI loop for 80m. It's about 8 feet off the ground and built according to the plans in the Sep. 95 issue of QST. It's 21 feet on each side and I used 450 ladder (window) line an
I recently put up a K6STI loop for 80m. It's about 8 feet off the ground and 21 feet on each side. I built it according to the article in the in the Sept 95 issue of QST, used 450 ladder (window) lin
Hi Dave, Perhaps the easiest way (if you have an antenna analyzer or access to one) is to check the impedance at the antenna using an antenna analyzer. That will tell you which way to go in modifying
On the other hand, if it is a receiving antenna, do you care? The additional loss in the feedline due to SWR *may* be trivial in this application. 73, Pete N4ZR At 02:51 PM 11/18/2004, Joe - WD&Oslas
Good point - how close is "close enough" - but if you're doing it the first time, why not 'do it right" instead of having to do it over? :-) 73, Joe WDØM At 01:11 PM 11/18/2004, Pete Smith wro
Well, as a 'frinstance, if he's using RG-6 75-ohm cable, say 100 feet long, and the antenna is presenting 240 ohms to the cable, on 1.8 MHz the additional loss in the cable due to the mismatch is abo
Still not a problem Pete - but if he was asking how to reduce the SWR - receive or not - that still didn't answer his question....just told him to ignore it. 73, Joe WDØM At 01:32 PM 11/18/200
say 100 feet on 1.8 MHz the .4 dB out of a The source never sets feedline SWR. The SWR on the line in receiving is set by the receiver, not the transmitter. The receiving feedline loss is calculated
Hi, Dave Brian Beezley, K6STI, explains how to match the antenna in the article on page 33 of the September 95 QST (same as the issue from which you built W6KUT's version of Brian's creation). ______
OK -- well, the program says that at the RX end this particular length of cable and other conditions presents a 23+smallj mismatch to a presumably 50-ohm receiver. The point I was trying to make is t
No not unless your feedline has very high losses. 73 Jim SM2EKM -- Pete Smith wrote: OK -- well, the program says that at the RX end this particular length of cable and other conditions presents a 23
particular length of to a presumably additional loss is antenna. Is that wrong?' No, that's correct. Mismatch is of little consequence. The difficulty with the K6STI "loop" isn't matching. The diffi