[TowerTalk] Ferrite beads for LDF4-50?

[Leeson]

I've had the same differential expansion problem on a long run of bigger 
coax with HN connectors. It would fail only at a certain time of day, 
and I traced it with a TDR to a taped all-black junction that was in the 
direct sun on the ground at that hour. I was able to prevent it in that 
case by enclosing the cable joint in a short length of white PVC pipe.

Dave, W6NL/HC8L

On 8/24/25 12:17 PM, Richard (Rick) Karlquist wrote:
> I have had this behavior on dozens of Type N's.
> 
> 73
> Rick N6RK
> 
> On 8/24/2025 11:41 AM, Michael Tope wrote:
>> I think the variety of type N connectors that don't capture the 
>> center-pin in the body of the connector are the ones that are prone 
>> to failure. On that variety of connector, the center pin is only 
>> attached to the center-conductor of the coax. With wide swings in 
>> temperature the differential CTE of the copper center-conductor 
>> relative to the dielectric causes the center-pin to migrate in and 
>> out. If there is enough differential contraction on the 
>> center-conductor, the resulting tension can cause the unconstrained 
>> center-pin to disconnect from the mating contact. I've seen this 
>> happen on long cables terminated with this type of N-connector.
>>
>> 73, Mike W4EF............