Pete: The open-ended feeder is used to inductively load the unused elements, making them into reflectors. The difference between old coax & new coax results in different amount of inductive loading.
After a cycle of living in the jungle in the middle of nowhere, I have moved to my former QTH, only to find that there is a ham on the other side of the football pitch in the same village, another ve
Although not quite as heavy as an MA-550, I recently moved a crank-up tower with a nested length of ~8.3m with a 2.something tonne Mazda flat bed lorry. A 2.something tonne Mazda flat bed lorry is no
After removing the cables from the lift shaft, I would suggest PY4RO check into the lift company's claim - if the building management allowed him to run them there to begin with, there may be an elem
W0ETC added: Precisely. NEC is not applicable outside USA. It may not even apply in USA for antenna feeders & non-mains voltage lines such as for a rotator, for all I know. Without specifically sugge
KI7WX asked: The problem with water wicking up the braid, as mentioned by K7LXC, can be avoided by tinning the braid for a short distance either side of where whatever weatherproofing that is to be a
WL7M recently reported his success at shunt feeding his tower. Having managed to shunt feed my 5.7m roof tower on 160/80m with uninsulated rope top guys & all the top loading a bit of wire & the 2.4m
VE7FO asked: From the base of the tower, I have connected all the radials I used to have on an HF2 that used to live on another corner of the roof. These are scaled up 450-ohm punched twinlead equiva
With the exception of VS6DO's fold-over masts, every single roof tower deployed over the past ~20 years on the south China coast that I am aware of has been guyed with rope. The same 4 mm kevlar haly
PY4RO asked: With the exception of VHF instead of UHF, what you describe is along the lines of my current & past two QTHs - top of three floor reinforced concrete house, each floor an separate flat &
The venerable W0UN continued: The title is correct. It is a dictionary of the "American" language. There is a distinct difference between English & "American". ;^) 73, BW2/VR2BrettGraham
I agree with AC7NJ - insulated backstay is the way to go on a sailboat. I have done this on a number of boats here over the years. If the boat is not to be scrutinized for off-shore racing, then one
W1UK noted: Come to think of it, I haven't seen a single Andrew Heliax (12~13mm) grounding kit that _didn't_use stranded wire, all of which have been sourced new in little more than the last ten year
All would be well advised to read their policies, including the fine print, or to do the same before purchasing a policy. I have $5 million third party risks cover as part of my standard renter's con
5B4AGN posted: Not true, sir. Just like the C3, going separate feeders requires moving one of the drivers to a different location on the boom. It is very clear from the dimension sheet I've seen for
5B4AGN continued: No problems, mate. Pardon my poor English, but us VR2s are like that... ;^) Comment based on fact that C31XR/single_feed isn't as simple as different tip lengths & different Q coils
All this talk about rotor bolts falling out reminds me of the time I happened to glance up at my KT34 some 20-odd floors above street level & noticed it was listing seriously to one side. Two of the
If this rotor is anything like some of the JA-made rotors I've seen in the past - where a comparotor looks at the indicator pot & then drives a motor in the control box to move the indicator - a prev