What's also interesting is none of the stuff in the shack has
negotiating issues -- so it doesn't seem to be the switch as a whole
getting swamped, but rather the CAT5 getting swamped going up the tower.
On 4/20/19 9:58 AM, Chuck McCown wrote:
So moisture + rf = Ethernet interference. Just as originally stated.
No standing waves.
Is your cat5 in liquidtight? Have you played with grounding &
ungrounding the shields? How about taking a garden sprayer and
selectively wetting things?
Sent from my iPhone
Begin forwarded message:
*From:* Matt Hoppes <[email protected]
<mailto:[email protected]>>
*Date:* April 20, 2019 at 7:52:12 AM MDT
*To:* Chuck McCown <[email protected] <mailto:[email protected]>>
*Subject:* *Re: [AFMUG] CAT5. FM. And Rain*
Yes. Problem goes away.
On Apr 20, 2019, at 09:51, Chuck McCown <[email protected]
<mailto:[email protected]>> wrote:
Have you killed the ref when you are having the problem? Might not
be ref related.
Sent from my iPhone
On Apr 19, 2019, at 7:11 PM, Matt Hoppes
<[email protected]
<mailto:[email protected]>> wrote:
19watts
On 4/19/19 8:58 PM, Chuck McCown wrote:
What is the reflected power when you are having problems?
Sent from my iPhone
On Apr 19, 2019, at 6:41 PM, Matt Hoppes
<[email protected]
<mailto:[email protected]>> wrote:
My thoughts too. But the reflected power right now is only 19watts
out of 9,000.
On Apr 19, 2019, at 20:14, Chuck McCown <[email protected]
<mailto:[email protected]>> wrote:
My guess is that the FM station has a problem with the antenna or
transmission line. Moisture throws off impedance somewhere and
you have a strong standing wave on the transmission line.
Probably a bad connector.
Sent from my iPhone
On Apr 19, 2019, at 5:52 PM, Matt Hoppes
<[email protected]
<mailto:[email protected]>> wrote:
Looking to the wisdom of the AF group on this.
I have some equipment on an FM tower. It’s a 9kw station around
150ft. We are at 250ft with two sectors and a backhaul. Netonix
switch in shelter.
Nothing else on the tower.
Normally all is fine. When it rains or is very moist out
(heavy heavy fog) we start having major Ethernet negotiation
issues. The ports will go from 1Gig to 10F sometimes.
Sometimes drop completely.
I’ve got ferrite beads wrapped about 5 times top and bottom.
Any further words of wisdom on what to try? I suspect some odd
grounding issue. But not sure how to track it down or isolate it.
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