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

[N1BUG]

My weak mind is trying to understand the problem. Maybe it's 
something to do with the imbalance of the antenna?

I ran QRO significantly exceeding this definition through N 
connectors at 144 MHz for many years without ever losing one. SWR 
was often well above 2:1 (more than 3:1 with any ice or snow) and 
the feedline typically was 150 feet or less of Andrew LDF5-50A (7/8 
heliax), with runs as short as 60 feet being in use most of the 
time. There was an N connector at the transmitter end too.

I can think of others who have abused N connectors even more without 
problems.

73,
Paul N1BUG



On 11/11/2013 03:04 AM, Roger (K8RI) wrote:
> On 11/11/2013 2:03 AM, Charles Harpole wrote:
>> Notice that the Alpha 76a warns to put no more than 100 watts thru it on stand by.
>
> Having used, misused, and abused N-type connectors, experience in the
> real world has shown me that these are not connectors to use for QRO.
> Yes, I know hams who have used them at the legal limit for years,
>
> I have found N-type will run the legal limit if the SWR is low AND to
> you QRO is not 1 watt over the 1500 and usually at the end of several
> hundred feet of inexpensive coax.
>
> 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'd prefer DIN 7-16 connectors, but haven't found a source at reasonable
> prices.  Although their construction is such that a small shop could
> easily copy the design.
>
> UHF connectors are fine if properly weatherproofed and the loss through
> 50 MHz isn't enough to be worth mentioning.  I just do not like their
> lack of strength and they start to get expensive to fit LMR-600.
>
> I'd limit my use of BNCs to a 100 watts as do you or replace them with
> UHF or N type for a couple hundred watts.