All you need is an RF Choke. You did not mention the frequency of the GP so can't give you any suggestions on coil value. In short, high Z at operating frequency and wire big enough to drain off stat
Ingrid Not sure what voltage you need at your bees (probably 115 VAC) but you might want to consider doing the following: 1. Get a step down transformer 115 VAC to 24 VAC. Buy 100 meters of direct bu
Andy, You would never use a relay at the element tip. The element can be lengthened by adding inductance or shortened by adding capacitance in series but that would be done at the feed point or the c
FYI - K5VIP took down a very nice 60 foot aluminum tower this week he will be selling. Full info should be available at the Virginia Beach, VA Hamfest September. 6th, www.VBHamfest.com 73, Ron W8RJL
You can nest the loops. Loop circumference is 1005/freq in MHz. Feed each loop by placing an electrical 1/4 wave of 75 ohm coax between the loop and the 50 ohm coax. A remote antenna switch can be co
Hans apparently has a metal plate against the outside of his house/shack with feed thru connectors (they come in lengths to go thru the wall) and apparently thinks humidity can get thru the feed thru
Tom, I think it is better to drill out the steel rivits and install SS bolts, nuts and tooth washers (all stainless) than just solder a wire between all SO-239's. If not you still have a corroded con
Speaking of proper usage How about guide wire vs guy wire. For me Guide Wire is like finger nails on a chalk board. Ron W8RJL Sent from my iPhone _______________________________________________ _____
John, The larger the diameter of the conductor the lower the frequency for the same length. It used to be called the K factor but I think they have a new name for it. Check any good antenna handbook
As noted in the handbook, K factor is important for antennas above 30 MHz especially when using rod or tube for elements but any change in diameter will have an impact even at 160 meters. I have made
Last time I tried to saw a core it wiper the teeth right off a hack saw blade. Maybe it was a bad blade? Tried another, then gave up. Ron W8RJL Ok, I have a requirement where an additional one or two
Jim, Yes, many refer to MFJ as Mighty Fine Junk but we can't all buy top of the line. When I was a 15 year old ham kid I would have killed for a Collins radio. The only hams in town with Collins was
Yep, Stiction Friction. Learned about it back in early 60's when we had to send a "dither" signals to gyros to overcome Stiction Friction and improve accuracy (missile program). What's the old saying
Jim, I would think that 23 turns of #10 could be self supporting (no coil form) and thus no insulation to breakdown. If #10 won't self support then go bigger with turns and length adjusted to end up
I got into this conversation late. I have used Sling Shots, Weighted Arrows and other wire antennaI launching systems but the best I have ever usd is the compressed air CSV-17 Antenna Launcher and it
Kelly If you want to stick with bow and arrow I have quite a bit of experience using that before I went to compressed air launch. First, go to the store and buy a ball or football shaped lead sinker,
N3FJP is a suite of logging programs. You can buy one or the whole suite which includes a general logging program, contests, QSO parties, sprints, net control program etc. They are inexpensive and ve
Larger diameter for same length would resonate LOWER not higher. What kind of match, also, lower to ground would be lower in band. Post SWR curves for each band so we can see what you have going. Sen
His tower is only out 1.5 inches at 20 feet which would be 3.0 inches at 40 feet his final height. I think he should put guy lines on it, go to 40 feet, make sure the tower is straight (even at an 3"
Arnie, A J-Pole antenna is a 1/2 wave antenna. A mobile mag mount could be 1/4 (not usually) , or a 1/2 wave or a 5/8 wave (probably). A 5/8 wave vertical antenna has more gain in the horizontal than