[Amps] "N, " "TNC" and "BNC" connectors are rated at 500 Watts and work at 1, 000 Watts as log as the load is good..

[Carl]

Are you sure those were real Amphenols and not copies?
I blew out several no names that looked OK when I first built the phasing 
for the various stacks for 10-40M.
After the 5th or so I stripped every one out of the system and retaped. 
Luckily no contest or new one for DXCC was involved (-;

Carl
KM1H


----- Original Message ----- 
From: "Roger (K8RI)" <k8ri at rogerhalstead.com>
Cc: "amps" <amps at contesting.com>
Sent: Monday, November 11, 2013 4:33 PM
Subject: Re: [Amps] "N, " "TNC" and "BNC" connectors are rated at 500 Watts 
and work at 1, 000 Watts as log as the load is good..


> On 11/11/2013 7:46 AM, Dr. David Kirkby wrote:
>> On 11 November 2013 08:04, Roger (K8RI) <k8ri at rogerhalstead.com> wrote:
>>> With a center fed, sloping dipole, which is far from being a balanced
>>> antenna, I have blown Male and the double female connectors by moving 50 
>>> to
>>> 100 KHz off resonance.  I've also had nearby lightening strikes take 
>>> them
>>> out.
>
> I had several double female Amphenols short out, used for splicing in 
> rotator loops and smaller coax feed to the sloping dipoles. They still 
> looked like new and I wanted to keep them for examples, so they now have a 
> band of red tape around the middle. They look OK and an OM meter shows 
> them to be OK, but they won't work even with a 100W on 75 or 40.
> The red tape is because the inevitable happened and one found its way back 
> into the system.
>
> I forgot to mention the part about being easy to assemble, but fussy about 
> dimensions.
>
> Another problem with N type and non captive pins is the coax center 
> conductor migration.  This is a problem in vertical runs and feeds to 
> sloping dipoles that swing in the wind.
>
> With vertical runs the linear migration can normally be solved with 
> LMR-400 and 600 by making a 1 or 2 turn coil just before the connector 
> (top and bottom). As long as the radius is not too tight, I've never had 
> it migrate in turns
>
> 73
>
> Roger (K8RI)
>
>> I suspect part of the problem is that they are often not assembled
>> properly. Often the male or female are too far forward or too far
>> back, which gives a less than optimal electrical contacts, and I
>> suspect thermal contact too.
>>
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1432 / Virus Database: 3222/6327 - Release Date: 11/11/13
>