I don't know if anyone has mentioned: If you can't get them apart any other way you could try a dremle tool with a cutting disk. Cut a slot on the outer tube several inches as needed. That should fre
I don't know about that one but I can tell you my experience with a mosley TA33. They have a balanced feed. However they recommend grounding one half with a small strap to the boom. That makes it unb
How high off the ground are the radials. Do you tie radials together at their ends inside the square where they cross each other? Thanks Gary K4FMX _______________________________________________ See
Easiest way to check the balun is to hook the feed line to the antenna without the balun and see if the same thing happens. Try a different swr meter. My bet is on a trap heating. 73 Gary K4FMX _____
Just a note about power handling ability: I don't know what the BN-86 was actually rated at but for 1kw input power on AM that equated to a power output of around 3000 watts by today's standards. We
An AM transmitter has a PEP of 4 times its carrier power at 100% modulation. Also the input power for SSB was 1kw average as seen by the plate current meter. PEP is some 5 times that. Look at your av
Perhaps part of the problem is understanding by some of the contributors as to what a single point ground system really is. A single point ground system is a single point only as far as your radio an
This is why the NEC requires ALL ground systems be bonded together. This is exactly why I said you should run a wire from your new ground system for the radio, over to the AC original ground system.
The whole idea behind the SPG is to have only one ground that the radio equipment sees. It has nothing to do with how other grounds are or are not tied together. However it is always a good idea to t
A good ground, a poor ground or no ground at all makes no difference in the chance that lightning will or will not strike an object. To determine the "cone of protection" that the tower will provide
Good points Jim, This is where caution should come in when some advocate a coil in the feed line near the house to act as a "choke" for lightning. It can just as well act as a multi turn transformer
The "cone of protection" is not an absolute thing. It only means that the chances of getting hit when under it are diminished. No 100% guarantee of not getting hit. Anything can have streamers come o
Copper pipe is more expensive. It is also difficult to connect sections of solid pipe together. 73 Gary K4FMX _______________________________________________ See: http://www.mscomputer.com for "Self
Even at only 20 db front to back ratio, if all the energy from the rear was redirected to the front instead, it would amount to less than .1 db additional forward gain. With only 10 db front to back
Not quite the way it works. Just because the feed is lower impedance and current is higher does not equal more radiation. Both current and voltage play a role in radiation. 73 Gary K4FMX ____________
Not even a step attenuater in the circuit. On top of that using the log scale on a 141T spectrum analyzer! Lucky to get within a couple of db with that setup alone. I am not saying their gain figures
I was looking at the picture and drawing of the test setup on the web site. They do not show any type attenuator in the drawing. Even making a differential measurement, trying to read to 1db on a log
I agree with Tom here. Splitting hairs over a db or two is not realistic. You have no way of really knowing. And the manufacturer probably doesn't either. I have always looked at boom length. If they
Hi Rick, Exactly my point, you need more resolution than the 10 db. Not to start another argument but I also have a 141 it is a 141A but has I presume the same IF unit, the 8552a. It does not have a
No. Doesn't make a bit of difference. 73 Gary K4FMX _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's