VHF Cabling and Connectors

Sep 24, 2018
3,437
Catalina 30 MKIII Chicago
My VHF cable has succumbed to UV abuse. Can anyone recommend decent and reasonably priced cabling and solder connectors?
 
Sep 25, 2008
7,462
Alden 50 Sarasota, Florida
My suggestion is to NOT buy coax or the PL259 connectors from Amazon or other generic online sources.

good quality coax, e.g., Belden, LMR, etc… has more dense braid (lower loss) and the connectors should be silver plated. Among the reliable sources are HRO and DXEngineering. Opinions vary on the preferable dielectric but I’ve found the foam core type coax can deform more easily around tight bends which are inevitable on a boat and therefore unsuitable.

as to type coax, some have lower loss but on a50ft +/- run, loss isn’t a showstopper consideration.
 
Sep 24, 2018
3,437
Catalina 30 MKIII Chicago
I'll be replacing the cabling from the radio to the deck. I'm guessing it's a 15ft run. Interested in model numbers for mid grade components
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,263
CAL 35 Cruiser #21 moored EVERETT WA
Jan 11, 2014
13,013
Sabre 362 113 Fair Haven, NY
The most important characteristic is the impedance, it must be 50 ohm coax. For such as short distance, go for convenience. On a long run up a tall mast low loss cable like the LMR cable is important, on shorter runs less so. How the cables are terminated is important, perhaps more important than the cable itself. Here are some instructions.


Defender sells the cable you want for a buck a foot. The connectors are also inexpensive, about $2 each.

 
Mar 20, 2015
3,243
C&C 30 Mk1 Winnipeg
I recently replaced the coaxial cable to the masthead antenna using LMR400UF equivalent.
With only a 15 foot run, you obviously have other options

Found these guys to be very reasonable in price and Made in USA

While they do sell the components to commercial customers, consumer customers can order cables made to order.
 
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Jan 22, 2008
198
Montgomery 17, Venture of Newport, Mirror sailing dinghy, El Toro sailing dinghy Mound, MN -- Lake Minnetonka
UV damage? Can you cover the exposed portions of your replacement cable with a sleeve or wrap such as this to minimize further damage?


or

 
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Jan 11, 2014
13,013
Sabre 362 113 Fair Haven, NY
UV damage to the cables is one concern, since most coax spends some part of its life exposed to UV there is usually UV protection in the outer sheath. Over time, like most things this breaks down and the cable needs replacing. The dialectic in the cable, the braid, and the core wire also deteriorate due to moisture entering the cable and time. This deterioration affects signal strength, reducing the range and clarity of reception and transmission. Replacing the whole cable is not a bad idea.
 
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Sep 24, 2018
3,437
Catalina 30 MKIII Chicago
UV damage? Can you cover the exposed portions of your replacement cable with a sleeve or wrap such as this to minimize further damage?


or

The ironic thing is that loom will break down in UV, at least most of them. I'll most likely use some heavy black heat shrink or amalgamating electrical tape to protect the new cabling. I found a very reasonably priced company that has some potential cables and parts. They reply pretty quickly to emails as well

Create your own custom RF cable
 
Sep 25, 2008
7,462
Alden 50 Sarasota, Florida
The ironic thing is that loom will break down in UV, at least most of them. I'll most likely use some heavy black heat shrink or amalgamating electrical tape to protect the new cabling. I found a very reasonably priced company that has some potential cables and parts. They reply pretty quickly to emails as well
I’ve been a ham for decades and have had multiple coax fed antennas including here in the uV capitol of the U.S., Florida, and never, ever has UV caused any problem. Cheap coax is a different animal.
 
Mar 20, 2015
3,243
C&C 30 Mk1 Winnipeg
The dialectic in the cable, the braid, and the core wire also deteriorate due to moisture entering the cable and time. This deterioration affects signal strength, reducing the range and clarity of reception and transmission.
Exactly what happened with a friend's previous boat ages ago. Signal was crap compared to other boats in the marina. When working on new standing rigging the sheathing was noticed to be cracked. New cable and suddenly the signal was great.
 
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Sep 24, 2018
3,437
Catalina 30 MKIII Chicago
The seller recommended this assembly. The price is great but it doesn't look terribly durable. Feel free to correct me if I'm wrong. Seeking opinions on this cable

RFC240 UHF Female Bulkhead to PL259

Bear in mind we are rarely more than four miles from the shore in Chicago. We have a handheld VHF and cell phones so this radio isn't a true necessity (perhaps I'll eat my words in a few years)
 
Jan 11, 2014
13,013
Sabre 362 113 Fair Haven, NY
The seller recommended this assembly. The price is great but it doesn't look terribly durable. Feel free to correct me if I'm wrong. Seeking opinions on this cable

RFC240 UHF Female Bulkhead to PL259

Bear in mind we are rarely more than four miles from the shore in Chicago. We have a handheld VHF and cell phones so this radio isn't a true necessity (perhaps I'll eat my words in a few years)
The cable must have 50 ohm impedance. The listing does not specify the impedance. I would not buy this. If the impedance is incorrect the radio will not transmit as designed.

Is the mast keel stepped? If not, how would you get the connector through the deck?
 
Sep 25, 2008
7,462
Alden 50 Sarasota, Florida
The seller recommended this assembly. The price is great but it doesn't look terribly durable. Feel free to correct me if I'm wrong. Seeking opinions on this cable

RFC240 UHF Female Bulkhead to PL259

Bear in mind we are rarely more than four miles from the shore in Chicago. We have a handheld VHF and cell phones so this radio isn't a true necessity (perhaps I'll eat my words in a few years)
That’s precisely the kind of crap I mentioned earlier to avoid - no-name coax and cheap connectors.
Given your proximity to shore, you may not need a VHF radio but if you do replace the coax, do it right.
 
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Sep 24, 2018
3,437
Catalina 30 MKIII Chicago
The cable must have 50 ohm impedance. The listing does not specify the impedance. I would not buy this. If the impedance is incorrect the radio will not transmit as designed.

Is the mast keel stepped? If not, how would you get the connector through the deck?
It's deck stepped. I was planning on using a cable gland and soldering one or both connectors
1673712712592.png
 
Jan 11, 2014
13,013
Sabre 362 113 Fair Haven, NY
That kind of gland is for a bare wire, the connector has to be attached after the wire is fed through.

Have you ever soldered a PL259 connector?
 
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Sep 24, 2018
3,437
Catalina 30 MKIII Chicago
That kind of gland is for a bare wire, the connector has to be attached after the wire is fed through.

Have you ever soldered a PL259 connector?
I've been soldering since I was a kid. I've done everything from other types of coax to SMD. The 259 doesn't look difficult
 
Jan 11, 2014
13,013
Sabre 362 113 Fair Haven, NY
The issue with the 259 is overheating the core and melting the insulation and soldering the braid to the connector.