When i arrived at the top and last few to change... Best to change the top ones first - that way if you run out for any reason, the 2nd trip will be shorter. -Steve K8LX ____________________________
I can't wrap my head around this. Yes, the element is "torque balanced" at it's own center, but at the boom center? I think not. -Steve K8LX required....at light end. Each ele is symetrical...so the
K6MR was kind enough to send me an article by K5IU that sheds some light on this issue. It's not intuitive (at least for me), but when you look at his drawings of the vectors and accept the formulas,
Those extra elements are in the way - otherwise there would many safe ways to get out to the spot you want to be in, all taking advantage of all your *headroom* for safety lines, and all doable by yo
I have a mix of Polygon and Philly. The 3/8" Polygon is from one of the early group buys, probably from the mid 90's. The surface of the Polygon seems a little rough, but I've been assuming the stren
Virtually new. They were part of a ginpole that we used a few times, otherwise stored inside. Asking 2/3 of the current Hill Radio net price, whatever that is. Located in the Detroit area, prefer pic
R55 does make a nice 60' ginpole, which is what you need (if it's not configured as a track pole) to stack 20' sections of R80 or R90 class tower. Under old engineering standards it was good for arou
I meant brass style Older Heliax connectors - the bronze style (I'm talking old here) - had solder center pins. Nowadays they are of the captured center pin style, as are most LMR connectors like EZ4
Older Heliax connectors - the bronze style (I'm talking old here) - had solder center pins. Nowadays they are of the captured center pin style, as are most LMR connectors like EZ400's and COMP-400's.
Agreed - the level of *effort* and where to put it being a personal choice of course. I'll note that the discourse that preceded K5PGW's note all seemed relaxed enough it shouldn't have hurt anyone's
Huh? Andrew/Commscope LDF series and AVA series cable are most certainly annular. Their FS series (what they call Superflex) is spiral. -Steve K8LX A minor detail: Heliax does not use annular corruga
Huh? Andrew/Commscope LDF series and AVA series cable are most certainly annular. Their FS series (what they call Superflex) is spiral. Before LDF was HSJ foam-dielectric Heliax, which was helical (
It *disconnects* the preforms from the tower legs. I must say I'm surprised that this action was needed when talking about 40 meters, but if one wants perfection, and sees SWR changes with antenna ro
Hey guys, After a recent lightning event I find that my 20M 3-high stack controller got zapped. This is an IC based homebrew design that a friend made for me in the 90's. I'll be able to swap in the
LDF4 is the same as it always was. It's the larger sizes where they are using a thinner shield. AVA5 took the place of LDF5, AVA7 is the new 1-5/8", etc. AVA cable has lower loss, but you can't drive
For a given cable size, impedance, and conductor material - one can compare center conductor diameters to find the cable with lowest loss. The one with the airiest dielectric will have the largest ce
THHN jacket seems to hold up well. It's just PVC but I've found it to be fairly UV resistant. The clear nylon coating is only there to make the wire slippery so that electricians can pull it easily t
That's what we did (on a small scale) with our 4 high 10 meter stack of 4L yagis. The yagis at 40' & 60' rotate together and are treated as one antenna in the stack switch. And likewise the pair at 8
It could be a poorly cut ring gear. I had two ring gears with that same problem. Late 90's vintage. see: https://app.box.com/s/3whadjfmzhxh0v7rpz2fp8d9auwlg3cp As you can see, there appears to be an
Any connector with a captured (non-solder) center pin will accomplish this, such as the Times EZ series (EZ-400-NM, etc) or many of the corrugated hardline connectors. As long as the connector was no