Jim, I was also given one of these Yagis many years ago and converted
it to a single driven element with a coaxial stub beta match. It is
tuned for the low end of 2M. IIRC, there was very little modification
required except for the driver. The EZnec model shows 15.05 dBi gain
with an SWR of 1.07. It's currently mounted about five feet above my
four element Steppir and performs well, although the only time I hear
anyone on 2M CW or SSB in these sparse parts is during VHF contests.
Even then, it's a relative rarity.
If you'd like a copy of the model, let me know.
73, Joe
K2XX
On 11/28/2011 4:05 PM, Jim Brown wrote:
> Don't go to the trouble, Mike. I printed the scans and they look great!
>
> The only other things I'd like to see is plots of gain, and any mods
> that might be done to optimize it for the low end of the band.
>
> 73, Jim K9YC
>
> On 11/28/2011 12:47 PM, Mike& Becca Krzystyniak wrote:
>> I have a soft copy and will send it directly to your email.
>>
>> Mike K9MK
>>
>>
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
>> [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Brown
>> Sent: Monday, November 28, 2011 11:41 AM
>> To: towertalk@contesting.com
>> Subject: [TowerTalk] KLM 13-El 2M Beam - Need Documentation
>>
>> One of the guys in our local ham club has given me this beam with a
>> design that suggests that it was made by KLM. There are two driven
>> elements made of tubing, with a crossover between them and a short
>> length of coiled teflon coax as a phasing line. The remaining elements
>> are small diameter solid aluminum mounted with feed-thrus to the 22-foot
>> boom, which appears to be about 1-inch to 1-1/4 inches. The antenna is
>> in excellent shape.
>>
>> I'm planning to use it for weak signal work on the lower 500 kHz of the
>> band. I'd like to know its specs, and what, if anything, I need to do
>> to optimize it for that end of the band.
>>
>> 73, Jim K9YC
>> _______________________________________________
>>
>>
>>
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>>
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