Does anyone know how to get in touch with K5FD? His email address is no longer working and his website appears to be down as well. 73, Dick WC1M _______________________________________________ ______
Sorry to clutter up the list with this, but it is tower related :-) Recently I posted a query as to how to get in touch with K5FD. His website is down and emails to his address are bouncing. Someone
After about 12 years, the motor belt on my US Tower MA-770MDP seems to have loosened up. It's slipping intermittently. I can see a few cracks in the material, so it's time to replace the belt. Has an
You haven't supplied and details about the tramming setup you used previously, so pardon me if these tips are redundant: 1. Make sure the pull rope, tram line and pulley (or trolley) are adequate for
For those who are installing new guy anchors, there were some posts here a while back about coating the rods with roofing tar/cement prior to burying them. I coated mine all the way from the cement s
My feeling is that the belt is so cheap I might as well replace it. As long as I'm going to the auto parts store to get the belt product, why not buy a new belt? Actually, I got a very informative re
Well, the FCC rules don't say anything about borrowing callsigns, but I think there's a loophole. Although there's a primary station location on each license, that's not the only station of which you
Good question. It's not easy to answer if you have a lot of cables, like I do. I think my current count is in the neighborhood of 30 cables. Here are some pictures of how I do it: http://share.shutte
That would have been my answer before the big disaster. Went 10+ years without a problem. Then the big one struck. I suspect part of the reason for my good luck was that one tower was a crankup with
I used small angle brackets from the hardware store to mount my IS-RCTs to the ground plates in a couple of metal utility cabinets back about 12 years ago, when IS_RCTs were somewhat reasonable in co
Why do you advise against an aluminum ground plate? Are you only against outdoor use or indoor as well? I have a pair of Hoffmann metal utility cabinets with aluminum grounding plates inside. They se
Gee, I don't know if I'd go through the trouble. Seems to me that continuity between the sections is pretty-well maintained by the system of steel cables and pulleys. They're under considerable tensi
Henk, The most recent pots I got from TIC are Vishay model 534. It's a 10-turn pot, 500 ohms +/- 5%, linearity +/- .25%. However, I've seen quite a few of these pots fail due to moisture ingress, som
I think that's correct, but I wasn't able to find the -3 or -4 pots in small quantities or reasonable prices. Nevertheless, N3RS has been using the -1 pots for years with no failures. YMMV (and mine,
I have a 3-stack of 4-el SteppIRs and lost all three controllers in a lightning hit two years ago. All the driver chips were fried. The RS-232 interfaces mounted on the control boards were destroyed
It would be complicated to do that, and I'm not sure the opto-isolators could be protected. SteppIR has a new controller with optional remote driver board with optional surge protection. It uses a su
That's great info, Jerry. So, if I understand the design correctly, if one of the two wires in a pair is accidentally disconnected, and it happens to be the return current line, the chip will burn it
When my lightning disaster occurred, I was using K5FD suppressor boards, which have two MOVs per line plus a 5A inline fuse. Each wire in the control cable was connected to a suppressor board at both
exact I think that's the case for all tall buildings, and must require some interesting engineering for various parts to flex properly in response. I vaguely remember hearing a long time ago about a
You can feel it more with Phillystran guys. My 110' Rohn 55 with Phillystran guys always feels less rigid to me than my friend's 100' Rohn 45 with EHS guys, even though the tension on our guys is th