Sheesh. I understood it EXACTLY. No one is going to use 3/8" rod for leg insulators, no matter what silly misunderstanding occurred here. -Steve K8LX Steve-- I think YOU didn't understand what was sa
When working correctly, the weight of the *slider* is enough to keep it sliding ahead of (below) the D-ring it's attached to when descending, but not ahead of a *falling* D-ring of course. In practic
Sounds like you've had some attitude (altitude) adjustment tonight. I agree. -Steve K8LX Now that I'm 85 when the temperature is above 90 degrees I limit my free climbing to 300 ft. and 700 ft. when
Actual modelling shows that guying can increase the load limits if properly applied. In the crank up tower case, UST specifically says its OK to guy the base section. The load on the base will be le
After much repeated discussion on this forum over the years I asked a structural engineer about this, and he confirmed what you are saying - that basically a guy system could be designed for pretty
No you didn't read it correctly Roger. His opinion was exactly as stated, that a guy system could be designed for a (existing) self supporter that would favorably impact the load rating. Maybe only a
I think he may be looking for an app that will do a station block diagram. In that case something like Smartdraw works pretty well. -Steve K8LX On 10/17/2014 7:00 AM, David Robbins wrote: For my so2r
I've been purchasing "lined" heatshrink in quantity for a number of years from an on-line seller called "buyheatshrink.com". Yes the name is a little hokey, but the quality seems as good as 3M at abo
One small point....UHF connectors for LDF4 (or ANY hardline or corrugated cable for that matter) have not been manufactured for a number of years, and unless you're lucky, you'll pay dearly for them
RE: UHF connectors for LDF4 Interesting, did not know that. I've used a ton of RFC connectors though, and they are very good quality. -Steve K8LX Second Try: http://www.rfcoaxconnectors.com/new-produ
There's something to that. In CATV, there was for a time a popular type of smooth wall 75 ohm hardline called "fused disc', which had lower loss over the 300 MHz or 500 MHz in use by cable TV at the
This is a very common problem in the commercial tower industry. One common solution, which I initially (decades ago) rejected as being crude but gradually came to accept as elegant, is to use bent (o
Here's another - short and nicely done with with a dronecam. http://tinyurl.com/nfr4nkm -Steve K8LX This is video of a technician climbing 1768 feet to the top of a transmissions tower for repairs. I
Lot's of broadcast towers are lit with LEDs, that's old news. A little pricey to install, but well worth it for the long term bottom end. OTOH, OTA broadcast companies are wondering what the long ter
Can vary from $500 to $3500 or more, depending on various factors: market (local rates? union?), customer requirements (changing all the bulbs or just the burned out ones), adherence to OSHA rules (a
I was flabbergasted at the response to Duffy's post, which seemed relatively non controversial to this relatively low level scientific brain of mine. Can't one specify a perfect ground (even though i
Can't one specify a perfect ground (even though impossible in the real world) when modeling antennas? Is that not a useful exercise as an educational tool? The only good reason for *assuming* homoge
IMO, strain-relief is the Main Attraction for rolling your own *connector-less* center insulator. Especially for the scenario where the feedpoint is suspended half way between the end supports. If th
This sounds like video cable, not RF cable. Probably has copper braid shield and solid dielectric. For many baseband video applications (generally rated for 6 MHZ), the characteristic impedance would
There's lot's of reasons to not bet your life on no leaks. That's a big reason plumbers stay busy. Youse guys are talking about piddly ass 100' runs. But even with a 100' run, expansion/contraction c