[Amps] Triband balun

[Carl]

Here is the full kit at a much lower cost.
http://www.rotor-parts.com/catalogue/oscommerce-2.3.3.1/catalog/product_info.php?products_id=43

Carl
KM1H



----- Original Message ----- 
From: "Roger (K8RI)" <k8ri at rogerhalstead.com>
To: <amps at contesting.com>
Sent: Friday, March 21, 2014 5:19 AM
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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>
>
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