On 2/4/2012 5:30 PM, Richard Solomon wrote:
> You will find that the piece of coax (shorting stub ??) length is
> critical. It took a
> couple of iterations before I got a reasonable match.
The Ringo does not tune that way. It uses a stub to the "ring" around
the bottom. Just move the connection to the ring CW or CCW to adjust
the SWR. They are relatively easy to tune.
Here's a link to the manual.
> The I bought a 5 el M2 beam and junked the thing !!
> 73, Dick, W1KSZ
> On Sat, Feb 4, 2012 at 3:17 PM, Jim Brown<firstname.lastname@example.org> wrote:
>> On 2/4/2012 11:27 AM, K. Alan Robbins wrote:
>>> Make the vertical radiator longer to try and get it down to the bottom of
>>> the band
>> That's a good solution. The difference between the top and bottom of
>> the band is about 8%, so I would start by making the radiator 7% longer.
>> That is, measure the current length, multiply that by 1.07, and try that
>> for the total length. Be prepared to prune it to length, like any other
>> Don't worry about perfect VSWR, but when you get the resonance (as
>> indicated my minimum SWR) to where you want it, then try playing with
>> the tap on the ring (if it's adustable).
>> 73, Jim K9YC
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