Top band DX-ing is real ham radio challenge. 160m is also referred as the "Gentleman's band"...
160 meters - DX-ing on the Edge...

Telescoping Fiberglass Mast - part III. by Gary, K9AY

12. prosince 2006 v 0:27 | Petr, OK1RP |  Antennas
Hi folks,
well as the last part of the Telescoping Fiberglass Mast suppliers tour You can read some comments and recommendations from Gary, K9AY as follows...
Gary, K9AY wrote:
I have used fiberglass poles for antennas since 1972 -- here a few notes from my experience:

1. Yes, only a few types of fiberglass poles will handle a large side load such as the top wire of an inverted-L. Some that are sufficiently strong include masts from The Mast Company
which You can find there:
and wind sock poles from companies like Jackite
which You can find there:
They have 28 and 31 foot poles, as well as shorter ones. Of the easy-to-find 20-ft fishing poles, the graphite SD-20 from South Bend is probably the strongest -- I've used these for the top 20 feet of portable DXpedition inv-Ls with aluminum tubing bottom sections and a #18 top wire.
I have also made sturdy masts using telescoping 1/8" wall fiberglass tubing sections from Max-Gain
which You can reach there:

2. Even the lightest poles like the MFJ 33-footer are OK for verticals if you run the wire inside. Cut back the tip section until you expose a large enough inside diameter to push the wire through. I've used #18 and #14 bare copper wire and 1/8" flat braid as the conductor. The size of the wire makes little difference if the full length of the antenna is the same size wire. But, when the pole with inside wire is beyond a loading coil, the greater capacitance of larger size wire or braid will reduce the required loading coil inductance. Over the years, I've made three 2-element "short-forty" beams using SD-20 or similar poles. The first was up 4 years in Colorado with no problems. The current generation model was up for 3 years in GA and is waiting to be installed again here in WI.

3. The only "trick" I've developed is epoxying a short section of aluminum tubing over the thick end of the fiberglass pole. This provides reinforcement and gives you a standard-size interface to mounting hardware or additional lengths of aluminum tubing. This and other notes were published in QRP Quarterly -- Winter and Summer 2006 issues.

73, Gary
OK guys > still You have not enough sources nor informations to find Your favourable supplier to buy and make some Flag, Inverted L or top loaded vertical antenna to be QRV on 160m ? When I will find some another supplier or interesting informations then I will put it over here.
For more discussion You can check the Top band mailing list. Do not hesitate to ask me if any quoestions or I will be happy to read Your experiences, comments, tips, tricks, hints or what ever...
Best 73 Petr, OK1RP

Buď první, kdo ohodnotí tento článek.


1 GUSTAVO GUSTAVO | E-mail | 19. ledna 2008 v 23:49 | Reagovat

Will like to recive a simple draw of K9AY loop for 160m for rx .I have a 1/2 wave dipole for tx but can not copy good with it, noise is always high .Hope can make a home made loop ,because I can not buy it.

73 s Gus CX3CE --------LOVE TOP BAND--------

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