I use Green Heron controllers, too. One of the most important features is that by default the motor will be shut down if the controller doesn't detect movement (you can override this at your own risk
I have three TIC rings built circa 2006. I've had only one pot failure, which occurred at least four years ago. I have a box of spare pots -- two Bourns that I believe came from TIC and seven Vishay
I have an MA-770MDP. Looks normal to me. I agree that it's a combination of rotor slop and twisting of the tubes. You might be able to reduce the movement of the tubes by cranking the mast down a few
I've often considered installing a safe climb system on my tower, but it has three TIC rings. The cable can't run outside of the rings, so the cable standoff from the tower can't be more than the dis
In an effort to move the conversation about tower accidents to practical information that may be useful to climbers, here's a list of safety equipment that I use for climbing and how/why I use it. No
Looks like a line break was put in the middle of it. Happens sometimes with email from the reflector. Try this: http://www.petzl.com/en/Professional/Harnesses/AVAO-BOD-FAST-international-v ersion?l=U
I believe the problem with sternal attachment is that pulling on the front of the harness with great force could cause your spine to snap backwards, a direction in which it's not designed to bend, po
I'm considering to replacing my very old Colatchco 40m 4-square phasing box and controller. I see that DX Engineering has several models, including two from Comtek and two of their own, and Array Sol
I have the same tower and remote package. Jim is correct. The controller uses 120VAC and it would be a code violation to run it in the same conduit as low voltage cables. Period. It's irrelevant that
I have a couple of phasing lines for an old Colatcho 4-square controller that I'd like to rebuild. They're made of Saxton 8315 and 8316 52-ohm cable. I can't find any specs for these cables online. D
Thanks, Jim. Could you summarize the procedure (e.g., measure the cable open or shorted) and arithmetic for me? 73, Dick WC1M known _______________________________________________ ___________________
The difference is that Schedule 80 is thicker and is able to withstand higher pressures. Check your local building code to see if it's required for buried conduit. It could be, or it could be require
I think it's because in our area there can be massive frost heaves in the frost zone. If the ground deforms enough, the constant expansion and contraction can crack or crush the conduits and/or tear
I did this by terminating the conduit runs in weatherproof metal boxes. Expensive, but well worth it. The boxes have ground panels for ground rods, cable shields, lightning suppressors, etc. This is
Which model Master Appliance iron/torch are you using? Is it the UT-300Si? FWIW, it looks like the Solder Pro and Master Appliance tools are made in the same factory... 73, Dick WC1M from cable to wa
I started out with LMR400UF on my MA770MDP and found it to be quite stiff. It had a tendency to bow out from the tower on the way down. That resulted in a large loop migrating to the other side of th
I believe the brushes Joe mentioned are the ones that connect the balun to the copper-beryllium element ribbons. Nothing to do with the stepper motors but another potential point of failure. 73, Dick
I'm not about to tell anyone else what to do, but a fall from the first set of guys could be fatal or cause massive injury. Even a fall from 10 feet can be very bad. I use dual clips, but they're a p
climb without a full length running safety cable" serves no practical purpose in the ham community. I didn't say I "won't climb" without a cable (after all, I do), and I didn't put it in absolute te
Interesting idea, but it wouldn't work with towers that have TIC rings. 73, Dick WC1M It's with some trepidation that I respond to this thread, but there''s one other climbing technique I have not se