Spiderbeam support for a doublet

 

You can see a 50ft run of RG213 leaving my old shack and traveling along the house wall, which eventually enters my shed. It is then terminated into a 1:1 coax choke balun. (The SGC tuner you can see on the wall is sometimes used when I use my push-up dipole, when this is the case I don't use the choke balun.)



Below is the Spiderbeam 40 foot fiberglass push up mast. Its quite a sturdy pole - the top section is 8mm in diameter. I have it fixed to the side of my shed via wall mount brackets and tied into position with rope! Here are a couple of pics showing the Spiderbeam in its down position.


Below you can see the pole extended up about 30 feet, supporting a roughly fashioned doublet. I basically got about 90 feet of hook-up wire and cut it in half, with each 50 foot leg being fed by 30 foot of ladder line. This then connects into the end of the coax choke balun via a low pass filter.

A bit unweildly..


For all you advocates regarding a balanced antenna system - Watch this space... I know that feeding the dipole would be better served by using ladderline from the shack. Whilst this is not entirely possible, I intend to replace the long run of RG213 by using ladder line. Only the first 10 feet leaving the shack will be coax. A DXEngineering 1:1 current balun was ordered to help facilitate this. Follow this link to see what I have to say about 'balance’.

© m0mrr 2021