[450] [Spam?] antenna (or feedline) woes

[Paul Cianciolo]

Yup.. Looks burned.

I hate using adapters….

 

Can you send me a better res photo?

 

I would like to see it better

 

PaulC

W1VLF

 

Check out my   <https://www.youtube.com/user/W1VLF/videos> Youtube Channel W1VLF 

 

 

From: 450 [mailto:450-bounces at lists.vhfwiki.com] On Behalf Of David McKenzie
Sent: Monday, October 9, 2023 2:12 PM
To: 450 at lists.vhfwiki.com
Subject: Re: [450] [Spam?] antenna (or feedline) woes

 

Cohen went up and swapped out the hardline connector and dropped down some chinese aluminum coax and it looks more reasonable. Upon disassembling the bottom of the hardline to regular coax i discovered that the N to UHF adapter I was using appears to be smoked. Hard line might still be OK and I don't have a need for this barrel anymore but it looks like this may have been the culprit. 

 

 

image.png

 

 

 

On Fri, Oct 6, 2023 at 6:36 PM Robert Busino <n1ujs at toast.net> wrote:

Noted.

 

N1UJS

 

 

 


  _____  


From: "David McKenzie" <k1fsy at vhfwiki.com>
Sent: Friday, October 6, 2023 4:50 PM
To: "144.450 Mailing List" <450 at lists.vhfwiki.com <mailto:450 at listsvhfwiki.com> >
Subject: [Spam?] [450] antenna (or feedline) woes 

 

I noticed this morning when I returned the meter to its normal position on the output of the TE systems amp that I was only getting out about 150 watts. I didn't check the reverse power immediately but when I put a 25W slug in backwards at 100W forward it shot up like crazy. Connected the nanovna and sure enough the match is completely screwed (with the tower mount preamp off .. which also makes a difference!) Oddly enough I'm hearing fine as I was tracking Rich up Rt 8 with no issues, so I suspect it may be water intrusion. It doesn't change when i rotate/shake the antennas so I don't think it is on the antenna, but it could be the preamp or the connection at the preamp that is at issue, or the old hardline, or the connection between the hardline and the coax outside at ground level. I can check the ground level connectors when the weather is nicer but if it isn't that I'm out of luck until my foot is healed well enough to get back on the roof. Gonna have to hook the loops back up.

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