Last week, I received the HDX555 crankup tower base from UST. I took a couple of pics if anyone is interested. Just a big, heavy (69 lbs.) Tee base and some rather large 22 inch long bolts with equal
wrote: My preference is for the ones with a pressure sleeve clamp and a 'top hat' ferrule that simply lushes in to contact the braid. That pattern requires no heavy soldering, and no stripping or tri
Worse yet, one of our locals screwed a PL259 into the N socket on his new rig! (Ohlordyme, the shells *do* use the same thread, don't they? Makes a quiet exit to upgrade the club's teaching materials
In Peter's household, even the cat can use a slide rule (wish I'd had the camera handy when it did that). -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek ________________________________________
It is probably due to the limited directivity of the Wheatstone bridge circuit. If the bridge is not perfectly balanced, there will be some small "leakage" of the forward signal into the detector por
I have e-mailed them for a pictorial of one of their products (I am ordering a HDX555). I have noticed in their website an absence of this type of documentation. I only found info on the concrete bas
Whichever method you use, always add your own local knowledge about the first few hundred feet from the tower. The closer the reflection point is to the antenna, the more fine detail is needed. A typ
I don't think there's any evidence for deterioration in exposed environments - quite the opposite. The Loctite seals and protects *everything* inside the thread gap, not only the two metal surfaces b
Thanks, Charlie - that's excellent information. As regards curing time, we come back to Jim's warning that there's more than one "it". According to the data sheet, 242 will cure on stainless or passi
I believe this range is colored red. Green Blue. There's also an even weaker pink range for use with very tiny screws. You're right, Jim, I should have been more specific. The grade I use routinely f
Haven't tried that myself, because as Carl says, there sometimes isn't enough meat around the existing hole to allow a big increase in hole size. I like the idea of the permanent stainless steel stud
Blue Loctite is excellent for many antenna jobs. It lubricates as you tighten the threads (prevents galling of stainless steel), locks the threads together so they won't vibrate loose, and seals them
The connector will probably be re-used in exactly the same way, so any residue of hot-melt glue will be a help in the next life. However, heat shrink tubing generally doesn't contain enough glue to g
Nice one :-) The total amount of noise from a Ham-x will depend more than anything on the way the operator uses it. A single sequence of "click... whir... click" is nothing to object to, even if it's
That can easily happen, as the equivalent lumped capacitance is only a few pF so the resonant frequency is extremely sensitive to small variations in strays. Even a twisted-wire 'gimmick' capacitor c
Capacitance between turns always exists, which is what creates the large peak in common-mode impedance at resonance. This is particularly desirable for a monoband antenna because the peak can be plac
Absolutely! We shouldn't be exporting Scotch to any place that uses three-digit thermometers. Back on topic, there have been several different kinds of self-amalgamating tape over the years. The very
The above is all true, but it seems to be missing the point. Paraphrasing Lawson, the important point is: The assumption of symmetry in a simplified model will guarantee that the modeler will NEVER s
It is important to terminate the secondary winding with a low-value resistor. If you do, then even an RFI suppression bead will act as a transformer with a very low insertion impedance in the main li
Hasn't it just? Good to see you back. Well, that's curiouser and curiouser! I guess we've about beaten this to death, since we don't know anything about the victim equipment either. Coming back to th