[TowerTalk] Interpreting symptoms

[w4lde]

Mike,

When I connect only the center pin of any coax fed antenna I usually get 
more noise since the cox becomes an antenna and this includes the SteppIR.

Since its a new motor and balum did you do a test of the wiring 
including running the element tape out a few inches per the test 
recommendations by SteppIR and confirm the element is wired and working 
correctly?.

Did this just happen (high SWR) or did it occur after the new motor and 
balum installation?.  What resistive readings are you getting on the 
driven element?  Can you read voltage changes on the output from the 
controller when you command the change at the controller?

It's hard to give a WAG without some additional info.  Hope it's a minor 
problem to fix.

73 de
Ron W4LDE




On 5/5/2011 6:37 PM, Mike wrote:
> Thanks, John -
>
> I'm going with the coax theory for now. It's a new motor and balun, so hopefully
> that's OK.
>
> 73, Mike NF4L
>
> On 5/5/2011 5:52 PM, john at kk9a.com wrote:
>> It sounds like your coax is not connected to the driven element.  It could
>> be a dead balan, bad connection or that the DE is fully retracted (if that's
>> possible with a SteppIR).
>>
>> GL
>> John KK9A
>>
>>
>> To: towertalk reflector<towertalk at contesting.com>
>> Subject: [TowerTalk] Interpreting symptoms
>> From: Mike<nf4l at nf4l.com>
>>
>> My SteppIR is exhibiting high SWR at all frequencies. Varying the length of
>> the
>> driven element does not affect it.
>>
>> If I plug only the center conductor of the coax into the rig the noise level
>> is
>> much
>> higher than when the shield makes contact. Any SWAG's as to what this means
>> the
>> problem likely is?
>>
>> 73, Mike NF4L
>>
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