About T-bars -- does anyone else remember pictures of Sigma 80 yagis broken at the junction between the T-bars and the elements? I think I recall one station where all 4 broke (on a 2-element). 73, P
I'm converting a Force 12 180C 75/80m dipole from linear loading + relays to the Seco Tornado variable inductor at the feedpoint (a custom design) for full band coverage (85' long and EZNEC predicts
Boy, I'm with you 100% on that one. The stuff is a mess. I've never understood why I would want to flood an RF connector with a non-conducting goo. silicone on the center pins and also the threads of
Can LMR-400 cable be buried without being in PVC, just buried? - Mike The DB versions have grease between the braid and the pvc jacket. Years ago, the db and non db versions were the same price ! I'd
the connector is filled, leaving no room for water. Valid? Who knows?! Well, yes - that's the theory. And I'm sure it works. But it's not the only way to waterproof a connection - only the messiest.
What is good practice for mounting the standard transmission line balun (DXE, Array Solutions, etc. PVC box with toroid balun inside)? Can they be mounted directly to a metal plate? Is a standoff nee
Do what the manufacturer says ... that is a familiar statement repeated here many times. But no one has been able to find out what the manufacturer, Rohn, says until now. This should answer the quest
Orbital rotors (K0XG) on a crank-up before? I would like to exchange ideas as this is my plan. Where are you proposing to mount it? I'd say the only place you could mount it feasibly is on the bottom
I think a Sleeve bearing would have been better still. <:-)) That's what makes the wood and other split blocks so nice. I'm not sure if that will make them last any longer, but it will make them run
You didn't say what kind of mast clamp you are using. While pinning a mast is good thing in many cases, I think you need to correct the fit of the mast clamp before going any further. My prop pitch h
One solution is to fix stainless studs into the threaded holes, using a permanent thread-locking compound. The studs pass clear through the holes in the lower part of the rotator shell and can be sec
I think we sometimes concentrate too much on looking at antenna heights that will maximize gain at certain take-off angles, and forget about the nulls. Those deep elevation nulls can be "killers" if
I suppose my problem was that my tower is going up and down twice a day about 5 days a week ( I always leave my tower nested) so the wire rope is rolling over the sheaves all the time, and its was no
I live on a small mountain outside D.C. and it is HEAVILY wooded. Just this spring I came home to find my 70ft tower laying across my roof. A 90 ft tree that seemed to be in perfect condition fell an
Here's a cut n paste from a ham in our club. We had some real wicked wind here a couple days ago; made a real mess north of Salt Lake with tractor trailers blowing over, fences gone, shingles gone, m
Regardless of wind area isn't there a boom length limitation on both the BX and HDBX series? 73 Roger (K8RI) Just fudge the ant wind load a bit, and perhaps 'take out' one section on paper. Then when
Pouring sealant in from the top is a bit "after the fact", BUT the old aircraft construction sprayed linseed oil for rustproofing into the steel tubes that made up the strength of the fuselage. Were
Grabbed some stuff they were going to throw away at work. no type marked on it, only mfg info is "IT&T Federal Cable REC". Looks almost new so thought it might be good for something. About the size o
Have the same tower, I am wondering about the benefit of grouting, especially after taking down a TMM433 that had a lot of rust underneath the base plate as a result of the grouting. My inspection of
the the space between the base plate and the top of the foundation block. I have purchased the proper non-shrink construction grout and am getting ready to do the job. But I'm concerned because I use