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Author Topic: 6m verticle home brew  (Read 1289 times)
KG6YSF
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Posts: 91




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« on: October 13, 2012, 12:55:02 PM »

I am considering making a 6m verticle using a chasie mount so239 and brazing rod. Does anybody have thoughts on what type of rod to use for the rod/wire sections? One is soldered in the upright position from the center and then four, one per corner hole, are soldered into the holes in the corners and the bent at a 45 degree angle. The coax connector is set in the downward position. The now top around the upright rod is weather sealed.
So what do you think of what the rod sections should be? Stainles, brass, copper? Ithink that the brass would be to soft. The stainless or copper expensive and where would you get it?

the vert is 54"

the radials are 57.7"
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"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
W4OP
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« Reply #1 on: October 13, 2012, 01:20:45 PM »

I don't think the design will hold up at all. That concept is OK for 2M and up, but a 54" tube or rod (assuming this antenna is outside) will quickly destroy the center connection of an SO-239.

Stainless is not a great conductor for VHF and up.
Brass is  a lot harder than copper.

Dale W4OP
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W9GB
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Posts: 2626




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« Reply #2 on: October 13, 2012, 01:49:05 PM »

Mike Fedler, N6TWW shows how to DIY Build a 1/4-wave vertical for 6 meters
http://fedler.com/radio/6m_vertical.htm

Bob Ricci, AF6D has a DIY Build for this 6-meter 1/2-wave vertical.  
http://scannerbuff.net/lowband/index.html

Reminds me of a commercial Lo-Band VHF (30 - 50 MHz) vertical antenna made for LMR service in 1960s/1970s.
« Last Edit: October 13, 2012, 01:51:42 PM by W9GB » Logged
KG6YSF
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Posts: 91




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« Reply #3 on: October 13, 2012, 04:32:47 PM »

I figured after doing some more thinking on it that it may be too much for the center section of the so239.
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"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
ZL3OF
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Posts: 20




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« Reply #4 on: October 13, 2012, 06:29:35 PM »

Try using a bulkhead through connector i.e. a barrel connector with a flange on it in place of the SO 239. Solder your vertical to the centre connector of a PL 259, insulate it from the PL 259 body with an inch of co-ax insulation and screw it in place.

You could make several of them for different bands, you could also instal a PL 259 based vhf/uhf dual band antenna on it.
If you made a 5/8 for 2 metres it will also be, with care setting it up, a reasonable match on 6 metres and you would have a dual band 6m/2m antenna.

You would have quite a versatile system.
« Last Edit: October 13, 2012, 06:49:21 PM by ZL3OF » Logged
W4OP
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« Reply #5 on: October 14, 2012, 02:31:58 PM »

The RF Connection (therfc.com) and likely many others sell an SO-239 to 3/8-24 threaded adapter. This would make a very robust point for your vertical. I don't see it on their site- but have bought many from them.

Dale W4OP
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WB6BYU
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Posts: 13355




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« Reply #6 on: October 14, 2012, 04:12:15 PM »

Standard mobile antenna mounts and whips are a good start.  CB whips are easily
cut down to size, and VHF-LOW band whips are commonly available.

The Larsen 2m 5/8 wave antenna makes a pretty good 6m antenna.
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