Topband: RX Power over Coax

[Grant Saviers]

Rick,

Did you CM choke the power and signal leads?  or the whole cable?

Grant KZ1W

On 10/7/2020 07:22, Mark - N5OT wrote:
> In my head this is becoming "101 uses for old network cable" which is 
> great because I've got a ton of it coiled up neatly and set aside but 
> not thrown away :-)  Thanks topbanders.
> 
> Still working on this year's vertical.  It will be ready for CQWW is the 
> plan.
> 
> 73 - Mark N5OT
> 
> 
> On 10/6/2020 6:20 PM, Richard (Rick) Karlquist wrote:
>> Exactly right.  I had trouble with "critters"
>> chewing my coax.  Nothing bad happened until
>> it rained.  Then the rain got into the coax
>> and the water interacted with the
>> DC voltage on the coax; terrible noise.
>> With the DC off, there was no noise even
>> when soaked.
>>
>> I converted the DC feed to CAT-5 cable and the
>> problem disappeared.  Another advantage of
>> CAT-5 is that you get 8 conductors, all
>> independent of the RF coax and the earth
>> ground.  Also, for whatever reason, critters
>> don't like it :-)  The RF coax was eventually
>> stuffed thru 1,000 feet of cheap sprinkler
>> pipe repurposed as "conduit".  Good enough
>> to keep the critters out and rain out.  But
>> I elected to keep the CAT-5 for DC.
>>
>> 73
>> Rick
>> N6RK
>>
>> On 10/6/2020 3:09 PM, donovanf at erols.com wrote:
>>> Hi Lee,
>>>
>>>
>>> Your testing will be inconclusive unless you inject water into your
>>> connectors, or you could just move to Maryland where we get at least
>>> 45 inches of annual rainfall and it gets into everything thats not well
>>> waterproofed
>>>
>>>
>>> 73
>>> Frank
>>> W3LPL
>>>
>>>
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