If you have an MFJ-259, or the likes, you could check the line with the "distance to fault" mode, remembering to use the feedline velocity factor to correct the answer. Gene / W2LU __________________
Remember, on the receive side the desired signal may go down 3db but the noise also goes down 3db. That's why you can get away with inefficient Rx antennas like beverages, pennants, EWE's, K9AY's, et
Hi Tom - I would be afraid that with the ends that close together on 80 that, at least up near the feed point, it would start looking too much like an unterminated feedline, or at best be directional
A delta loop is af fine antenna but you probably don't have room to lay out the base wire and it might be bidirectional, but have some gain. I'll stick with the end loaded vertical. Effecient. Balanc
Has anyone had experience with "Browning BR-240 LOW LOSS 50 ohm" cable ? Wondering how much power it will take on 75/80m with 3:1 SWR and coming up with very little online. I've got a bit of it and a
Hi Tony - I'm a bit more casual then many on this site. Since a pennant pattern is nearly 120 degrees wide I use four from one center post, terminate the center of the vertical leg with about 850 ohm
Yes Jim, and how many missions it had flown before it saw it's first ham use ? My first ppm was still in a wooden crate ready to be shipped back overseas after having been rebuilt by GE. Another had
The four longest elements on my 7-60 MHz LP are about 45 feet with linear loading. I did my own "engineering" on the array and wound up using "plytubular" construction. The "center" tubes (+/-) are 1
I don't like having the gov't tell me what I can or cant do when I'm not endangering others. At first glance it might seen as though I should be able to "climb my tower naked " if I wanted, BUT -- if
Be careful of the "doorknob" capacitors. When you get bigger than about 100 pf the temp coef will be such as to cause drift off design freq./ matching. when using high power. Using a larger number of
I sent this to Roger a couple of days ago,but judging from the other replies, I'll forward to the group. Gene / W2LU _______________________________________________ __________________________________
I"m surprised we haven't heard from at least one ex-navy man who might be familiar with their cable care routine. I know they have "oilers" whose job it is to lubricate/grease the ships cables. There
Hi John - Whatever focuses the transmit signal also focuses the receive signal. . What we're looking for is an antenna with the most tightly focused aperture in the desired direction. This brings in
Another way to appease your transmitter, if the transmission line SWR is too high, is to vary the transmission line length by fractions of a wavelength. This doesn't actually improve the SWR on the l
I use short lengths of 1/8" nylon line. Inexpensive, long lasting and can be untied to add or delete cables. Gene / W2LU There are various grades of cable ties. The good ones are not inexpensive howe
Dave's method of using the copper reducer/couplings works great, but I use the standard chassis mount UHF connectors. The shield end of the reducer can be slit, and then slid back out of the way whil
Hi Rob - If you can settle for about 270 degrees of rotation, I'm sure that many would suggest a DIY sidegate. With a 50-60 degree forward beamwidth you really wouldn't miss much and they're fairly e
Hi Glen - I just set it up so the bottom end was secured to the top of the tower with the bundle leading towards the mast and the top end fastened to about the center of the boom or just below the bo
Hi Rick - I wonder if in a case like yours you couldn't have attach the bundle two or three feet out from the mast, on the lowest boom, and on the tower, down a few feet from the top and let it coil