Search results

Hit a TX Star dx500 straight 4 pill, (Toshiba 2879) with a Stryker 655, or 380 Magnum? Can you set the radio carrier to lo watts (less than 5 watt radio carrier) and swing like crazy into this amp? Will it give monster ahhhhhdeeeeoooooo???? Or, is 40 watts of pep the most you can input into this...

I'm thinking there should be some capacitive coupling between the wires. It's an interesting antenna. Years ago I took a 5' Wilson silver load and added a thermaleze wire to it, just brazed it on at the ferrule and wrapped it alongside the Wilson wire and brazed again at the top. Slid some heat...

Ok. I might have a couple original Van Ordts in storage... I think I'm gonna see if I still have them. The originals used thermaleze wire, I believe. I'm curious if they get any gain by using 4 isolated wires running in parallel?

Been looking online at a Van Ordt clone... Started wondering if they might be NOS Van Ordt...Anyone know anything about these Procomm Q45W 4.5' antennas?

Copy that. I'm lucky enough to own my truck..lol... I'm running Wilson's with lmr 240 75, cut to 1/2 waves, which I believe is 0° phase. I'm pretty sure there is cmc present, as I haven't choked the line at the feed point. Just ordered some ferrite snap beads from Palomar today, the big 1"...

So, both verticals will need to be transformed to 100 ohms each, at the feed point. That makes them 50 when driven in parallel? What about coax, both legs 100 ohm also?

Lol..... I have been out of the radio thing for a looooong time. I never understood cmc back then, although I probably should have.... Anyway.. I've been doing some reading. I'm interested in driven verticals and getting some gain from the array. I've been learning that correct phasing is...

[ So far we've discussed what happens with a single antenna element, in regards to coax length, vswr, and feed point impedance.... What happens when we use multiple antenna elements? For the sake of discussion, 2 1/4 wave verticals spaced at a 1/4 wave, fed at 90°... Wouldn't coax length...

I think I'm getting it now... CMC affects the vswr because the coax has become part of the antenna. The outer ground shield of the coax is operating as the antenna ground, and the antenna current is freely flowing on the outer braid because.... A) there is no current choke at the antenna feed...

Probably right.... I've been using some Wilson 2000s'. They were great, until it rained... Now they've got water inside them. The clear window on the coil body shows the moisture. When they were dry inside they matched up, now my swr is 3:1. Gonna try drilling out the bottom, see if I can dry em...

Agreed. 2' no bueno. I'm hoping to make my own 4, maybe 4 1/2' using some aluminum pipe and a 2' antenna

I like the skipshooter antennas, but I'm limited to about 4' overall length, they mount on the west coast mirror brackets on my Western Star... Feed point is a little over 8'...

Copy that. Am curious to see if I can end up with a fairly rugged and highly efficient fiberglass whip

I've got a couple, and I'm curious to see what freq they resonate at... And how much rewinding of the inductor will be required. Should be a lot fewer turns, which would result in lower loss. (Yes?) I like the idea of heavy current on the first 2' and then top loading the antenna...or possibly...

Put a solid aluminum extension on the bottom of a fiberglass whip.... Something like a 2' aluminum shaft at the bottom of a 2' Wilson, or Firestick whip...

. So, common mode current travels into the srw bridge and combines with the current traveling on the center conductor... Skewing the meter reading?

Very cool.... Thank you

Ok, I understand that. If I have a shortened vertical @ 27 MHz, and I use a loading coil antenna like a Wilson 2000, to cancel capacitive reactance, and achieve resonance, but the feed point impedance is under 50 ohms, then I can use another inductor, like some enameled wire wound into an...

Gotcha, the feed line ground braid becomes the counterpoise, (antenna ground image), yes?

I think I get it now.... If the antenna feed point is not 50hms pure resistance.. There will be a reflected wave on the center conductor, (the power not absorbed by the load). You can find a point in the transmission line where the intersection of the forward, and reflected, wave meet....at...