ARRL

WA9WVX

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

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HF Beam Antenna Polarization Aug 19th, 02:05 6 102 on 21/8/14

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Topic Author Posted On
40 foot tilt tower winch system brakemanbobsmith 3 hours, 7 minutes ago
Bob,

I'm trying to visualize what you have for a Rohn Tilt Over Assembly. Is this what you're using? http://www.antennasystems.com/Merchant2/graphics/rohn/BPH25G.jpg

Or something like this?
http://www.nn4zz.com/images/TiltPlate/TiltOver100.jpg

You haven't provided which Rohn tower size you have: 25G, 45G, 55G, or 65G?

These things matter when anyone would recommend what you might do. I hope you have cleared this with your City, Town or County's Building Department for a Permit as they require drawings in triplicate. You better know a Structural Engineer to approve what you're planning on doing or you'll end up having to remove the structure at your cost. PRB-1 is only as Good as you doing the official paperwork, not I thought I could do this and ask for foregiveness. Building Departments do not have that type of a Sense of Humor, no matter who it is.

Dan
WA9WVX
Restricted space multi band HF antenna recommendations Alfdude1 2 weeks ago
Hey Zack,

I wonder if Alldude1's HOA would approve my favorite Flagpole? It's located in Sheboygan, Wisconsin.

http://mortenson.wistia.com/medias/tejnwpitig Just Copy & Paste into your browser.

Dan
WA9WVX
Antenna Mast material - Rigid conduit? K4YOR 2 weeks, 4 days ago
2" is a reference for Rigid Wall Conduit, the actual size is 2-3/8" Outside Diameter and the nominal is 2-5/16" Inside Diameter making the Wall thickness slightly over 1/4". I'm not so sure that a Ham M Rotor has enough tolerence to slide a 2-3/8" pipe into it.

Dan
WA9WVX
Yaesu FT 102 brakemanbobsmith 2 weeks, 6 days ago
Bob,

Each HF transceiver has it's pluses and minuses, the FT-102 is probably the last hybrid solid state / tube finals and if I'm not mistaken it a 12BY7 Driver & 3 - 6146A tubes in the final, a good combination, even using with a 2:1 VSWR. This transceiver will easily drive a KW RF amplifier providing good CW / SSB contacts and I believe the components are still available throught Yaesu, Digi-Key or Mouser for semiconductors. It is a 32 year old product but if the former operator took good care of his equipment then it might last another 5~10 years. The Yaesu Xcvr, Ext. Spkr & Microphone might be worth between $500 to $600 if it has the Optional FM Module.

No Model number on the RF amplifier so I won't make a guess on Dollar Value.

For the FT-747GX, this is all solid state transceiver and depending on if it has the Optional FM Module, the selling Price would fall between $250 & $300. You will be required to have a separate +13.6 VDC @ 25 A Power Supply or mount the transceiver in your vehicle as that is what this radio was designed for, mobile operation. Both transceivers are good starting rigs for HF or the long time ham. BTW, I hope you Pass your General Test and start enjoying the hobby. Also try to get the Model number on the RF Amplifier as I'll be checking your Post everyday.

Dan
WA9WVX
HF Beam Antenna Polarization WA9WVX on 21/8/14
Hi Eric & Zack,

Thanks for your input on my question. Ironically the HF beams are already manufactured, i.e. M2, Mosley, HyGain, SteppIR, Bencher. Tennadyne & Force 12 can be mounted in the vertical plane although with many of these antenna booms, they may require additional aluminum tube inserted inside of the manufactures supplied boom material to sturdy up the boom. I'm thinking that if anything has to be done, I'll have to do this myself to prove it works or not in the real world. Now for the experimenting.

Dan
WA9WVX

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