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surprisingly stainless don't play nice with other metals..a galvanized turnbuckle will be better and use tinned wire

i am no expert on multi band vertical ,but i believe there is a trapless variety ..that are available in the UK..i have one from some stuff i get from a SK ..thay are just a 11m silver rod 1/2 wave or a fiberglass a bit like a A99 with a UNUN at the bottom.. i suppose the taped coil at the...

my 5/8 waves in the past have alway improved with height..modelling also shows a lower take off angle the higher you go ..the pattern only gets undesirable after 4 or 5 wavelengths high as the pattern becomes saw tooth with big nulls but the lowest lobe still keeps getting gain and lower down...

what i did off the bat to mine was throw away the self-tapers that hold sections together slot the tube and use hose clamps, i also used penny washers to bolt the ring together as in the video i posted i also taped at every joint Heverly which i think it helps with mechanical strength like where...

here you go

Hi Bob that is useful info. Until I made the thread i did not know if the G-Max was real. or marketing BS, although I am not thinking of replacing the V4K any time soon so would the new V4K be a little better than your mate's sigma4 and match the G-Max? i think the trick for antennas' survival...

Thankyou for your reply ..the more i learn the less i know.. price is 290GBP in the UK inc delivery for reference a Sirio gain master is 160GBP and a Sirio new vector 4000 is 130 from the same vendor if the top of the G-max was at the same height as a vector 4000 do you think it may outperform...

As per the title, all the photos are in the link I did some googling some time back and found no info on how a coil between a 1/4 wave section and a 5/8 wave section will give the necessary 180 degrees of delay or if a coil can be used this way to make it work as a collinear as we know a 1/4...

now my next tower is going to be insulated from the ground so it will be straightforward to use the tower for an antenna But my present tower is earthed very well into the ground ..my thinking is you can have an antenna like a Victor 4000 or any other completely DC-grounded antenna and match it...

the SD1446 is rated at 70w PEP so times 4 is 280W .. FM will be much less

was it me or did this site disappear for a few days???

the radials are the other 1/2 of the antenna ..when you are modeling you see currents on them

what most folks forget is to seal the ground radials as well as the radiator ...just as important

i cut and past this from a reply i did on FB yesterday ..looks like good electrical tape applied well can last 35 years.. i never had any problems with any joint i have ever done unless there was a mechanical fail >>>>to seal joints i use just good quality electrical tape..i make certain i keep...

yes, an analyzer will be needed ..but i had an idea... i could design it for any frequency and scale it up or down ...so if i had 2 telescopic antennae, you can buy pretty big ones or have some ally tubing with a lot of adjustment and set the length for 5/8 wave for whatever frequency, feed...

not really sure why you posted this here ...i am asking about the design of a vertical antenna but looks like a good antenna and deserves to be posted someplace

no ..use hose clips ..good quilty preferably stainless and cover with good quality electrical tape

i understand that but if i was to design a vertical OCF 5/8th wave how would i determine the feed point?

I was researching the Shakespeare big sticks for some unknown reason and as i have been amassing materials to make an aluminum 17M vertical dipole .. a dipole was chosen as no radials are needed and simple construction with the coax going up inside the ally tube feeding the center and no...

having just read all this thread i would like to point some things out things 1 if the antenna is shorter it should still work just as well for 11m when it comes to SWR as the manufacturer will have (or should have) adjusted the value of the components in the matching device to compensate...