[Amps] Triband balun

[Alek Petkovic]

On 21/03/2014 5:33 PM, peter chadwick wrote:
> <snip>
>    

> What Hy Gain were thinking off when they used an unprotected terminal strip I don't know - or were they just thinking of locations like the California desert?
>
> 73
>
> Peter G3RZP
>    

Too right mate. I'm 300m from the Indian Ocean here. Salt is the daily 
challenge. I have two hobbies. Amateur Radio and trying to cope with salt.

Lovely place apart from that.

73, Alek. VK6APK





>
> ========================================
>   Message Received: Mar 21 2014, 09:19 AM
>   From: "Roger (K8RI)"<k8ri at rogerhalstead.com>
>   To: amps at contesting.com
>   Cc:
>   Subject: Re: [Amps] Triband balun
>
>   On 3/21/2014 3:35 AM, Jim Smith wrote:
>   >  Gary
>   >
>   >  If you want to make a balun by coiling up a bunch of coax you should
>   >  check this out first.  Removes all the anecdotal BS and gives you
>   >  something real to work with.
>   >
>   >  http://www.k1ttt.net/technote/airbalun.html
>   >
>   >  When I replaced my TH3 balun I used a DX Engineering current choke,
>   >  including the appropriate clamps for attaching it to the boom.  Been
>   >  using the TH3 since 1967.  Only recently got an amp, though, which is
>   >  when the balun failed.
>   >
>   >
>   >  Roger,
>   >
>   >  I had a look for the connectors you mentioned.  It isn't clear to me
>   >  which ones would be appropriate for the Ham M.  Do they mount in place
>   >  of the terminal board or do they just hang from wires dangling from the
>   >  rotator?
>
>   They have a bulkhead plate that mounts in the hole where that termonal
>   strip resides (2 screws). There is a hole with a grommet for the cable.
>     The ends of the cable solder to the places where the wires from the
>   terminal strip went.
>   http://www.hy-gain.com/Product.php?productid=870596 shows the parts.
>
>   There's a parts pack (870598) that "might" be the whole works, but I'd
>   call Hy-gain and ask them specifically.
>
>   You can put a half knot in the cable inside the rotator that rests on
>   the plate.  I'd not hang a 100 feet of cable on it, but it's plenty good
>   enough to hold a cable that is taped to a tower leg.
>
>   This is just the rotator end, there is a matching female cable end.(part
>   # 870597)  When I bought my conversions they came as a set.
>
>   They are not waterproof, but can easily be made so.
>
>   If you have to rebuild any of the Ham series, I think these are well
>   worth the extra work to make the conversion.
>
>   73
>
>   Roger (K8RI)
>
>   >
>   >  73, Jim    VE7FO
>   >
>   >  On 2014-03-19 18:05, Roger (K8RI) wrote:
>   >>  ny suggestions for a better alternative that will hold up in a RTTY
>   >>>>  contest?
>   >>>>
>   >>>>  Thanks,
>   >>>>
>   >>>>  Gary
>   >>>>  KA1J
>   >>>
>   >>>  REPLY:
>   >>>
>   >>>  I had the same problem many years ago. Hy-Gain made a replacement balun
>   >>>  called the something-2000, which did the job. I don't know if Hy-Gain is
>   >>>  even around anymore, but if you can find one, that will fix it.
>   >>
>   >>  Hy-Gain is still around. Same people, even in the same buildings, or
>   >>  were when I called about parts for the AV640 vertical a few months back.
>   >>  The only difference is, I believe they are owned MFJ.
>   >>
>   >>  I see they are advertizing the new connector kit for the tail
>   >>  twister/Ham series rotators which work on all the Ham series and a
>   >>  marked improvement over the old terminal strip.
>   >>
>   >>  www.hy-gain.com
>   >>
>   >>  73
>   >>
>   >>  Roger (K8RI)
>   >>
>   >>
>   >>>
>   >>>  73, Bill W6WRT
>   >>>
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>   >>>
>   >>
>   >>
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>    

-- 
 From sunny Binningup, Western Australia.

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