My vote would be to pull all the cables and ropes out, and suck a brand new rope through, then use that one to pull several new ones. A shopvac on one end will nicely pull mason's twine or equivalent
It's not, really... RF properties are sufficiently different that you basically have to measure it. The big difference you see in voltage ratings for AC and DC more reflect typical usage (i.e. 110-22
Don't forget that there is a big difference between: 1) electrical safety ground (the green wire) 2) Lightning protection ground 3) RF common Single point ground is fine "within a box", but you start
Any round element will vibrate in the wind...simple mechanics and aerodynamics (shed vortices), and forms the basis of such things as aeolian harps. The vibration might not be noticable, or it might
Even at 100 kHz, skin effect is very significant! and at HF it's a real big deal: this is why copperweld wire works as well as solid copper (electrically). Skin depth in copper at 100 MHz is 0.26 mil
At what frequency? What sort of RF current capability and voltage rating do you need? How much loss are you willing to tolerate? How stable does the capacitance have to be? For instance, will standar
That would be the voltage along a transmission line with that kind of mismatch, and a resistive one to boot.. What number will you use for the impedance of the relay, and is there any reactive power
I'd also encourage anyone with interest in this sort of thing to take a look at the XLZIZL spreadsheet from Dan, AC6LA http://www.qsl.net/ac6la/xlzizl.html Very cool.. handles every kind of transmiss
Thousand Oaks, CA has a similar strategy.. More a question for the ham-law forum: Is $1000 a "reasonable accommodation" under PRB-1? In the OTARD rules, a $5 fee for a Ku-band dish was held to be unr
Actually, they can make new rules that affect existing operations, etc. However, they also have to compensate you for the loss (so they don't get into trouble with the "takings" clause of the 14th am
You might want to take a look at Q-MAC (an Australian company) who has a very interesting take on a magnetic compact loop roof top antenna. The SGC HF manual also talks about using autotuners and loo
That is, you have a "fall radius within property lines" kind of restrictions. Short answer: it is unreasonable, because a totally laid out flat kind of failure isn't particularly credible (depending
you might want to consider a fairly straightforward "relay module" that is a simple PCB with the relays and a bit of drive electronics (kickback supression diode, transistor with/without optocoupler
<snip> Hmmm.. is a quarter wave actually how far apart you want them? I don't know that putting two chokes at 1/4 wave apart guarantees that one is at a high current place in the line (maybe they win
OK.. good point.. the choke acts like an open on the TL formed by the Coax shield /environment Excellent idea... What does your probe look like, and is it broadband or tuned? I agree... d and e are b
One uses a rebar bending tool (looks like a conduit bender) to get nice bends. Alternate approach is to get a piece of iron pipe of sufficient ID that the rebar will slide inside and use it as a tool
I'd also mention that all too many of those comments seem to be along the lines of "BPL will make HF unusable, don't do it" When the FCC has said that BPL is a done deal, and they're just looking for
Read the policy... Is it "replacement cost as installed" or "parts and materials"? Say part of your roof had been blown off. Would the policy cover the shingles, or the shingles and the labor to repl