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[Towertalk] TH6, TA33/34, MA770 MDP

To: <towertalk@contesting.com>
Subject: [Towertalk] TH6, TA33/34, MA770 MDP
From: n4kg@juno.com (n4kg@juno.com)
Date: Sun, 10 Mar 2002 05:35:29 -0600
Don't forget to TAPE the trap end covers to prevent uV deterioration,
unless you enjoy taking your HyGain tribander down to replace them 
every few years.

SS bolts / nuts can be purchased locally at most Fastener Supply 
houses at low cost with NO shipping required.

Tom  N4KG

On Mon, 04 Mar 2002 Lee Buller <k0wa@swbell.net> writes:
> At 07:57 AM 2/27/02 -0800, you wrote:
> >Is there wisdom to be shared regarding a TH6?  I'm planning on
> >putting together an old TH6, and would appreciate any constructive
> >input.  Perhaps balun, tuning, and dimensions to achieve the best
> >Front-to-Back, for both the CW & SSB portions of the band.
> 
> I have a TH6DXX up for the last four years after I refurbished the 
> antenna.  Here is what I did.
> 
> New caps and end traps.
> Tacked them on with a little hot glue as well (two points of hot 
> glue)
> Threw away the BN86 Balun.
> Purchased the Balun from Radio Works (4 KW job)
> Attached the Balun with some hose clamps.  Worked Perfectly.
> Replaced all hardware with Stainless Steel (you can get again from 
> MFJ-Hygain)
> Cleaned an polished all connectors (used Dremel Tool, Steel Wool, 
> and fine 
> sand paper)
> Used Noalox.
> Set the beam up in the back yard and go everything verticle and 
> straight.
>          Then I drilled a hole in each element to boom clamp and 
> screw in a 
> self-tapping screw so there is a good connection and the element 
> won't slid 
> around when it is being lifted into place.
> Replaced the truss cable and turnbuckle as well.
> Measured three times for low phone operation.  (Low phone gets you 
> the best 
> results for both CW and SSB on the TH6DXX)
> Measure three times....I hate going up and down with the beam. (I am 
> still 
> unhappy with 15 meters, but it works)
> Built a truss to raise the beam. (complicated tramp lashup the work 
> OK)
> The end.
> 
> 
> 
> >Also, I'll be transforming a TA33 into a TA34.  Any hints and 
> advice
> >on this one?
> 
> Put it into the bone yard.  I have one.  You want it?  Really, the 
> TA-33 is 
> a good antenna but very little F/B and not to mention gain.  The 
> TH6DXX 
> (more than 25 years old) beats it every time.  It is no Force 12, 
> but it 
> still gets out.  I ran a TA-33 for years and was really disappointed 
> with 
> its performance.  I might use it as a low beam but I doubt it.
> 
> 
> 
> >Last but not least, I'm also reviving a old MA770.  I've got it
> >completely disassembled, and preparing to replace the cable and
> >pulleys.  Any advice or knowledge on pulleys and the cables?  I've
> >also heard talk about lubricating the cables.  Has anyone had any
> >problems in doing so?  Has anyone been successful using different
> >pulleys?  Any hints and advice on this?
> 
> Be damn carefull.  Those things can cut if your fingers, hands and 
> toes.
> Think, think, think
> 
> Lee - K0WA
> 
> 
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