While I started using BNCs on my receive only connections, like a second receiver output for the Omni 6+ , I also have been using them for Xmit as well. Their convenience of quick disconnect beat the
OK, the standard BNC is rated at 500 volts. At 50 ohms, that looks like 5 kW. (P = V squared over Z) But, if you feel concerned, you can get BNC high voltage version with about a one inch ribbed back
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Thu, 11 Apr 2002 17:00:12 -0500
Neither center pin will carry the 10 amps current required to feed a 50 ohm load 500 volts. Considering the center conductor of RG58 is only 18 or 20 gauge, the WIRE won't carry more than a couple am
Stuart, how much current will that little pin and socket carry? 73/72/oo, George W5YR - the Yellow Rose of Texas Fairview, TX 30 mi NE of Dallas in Collin county EM13qe Amateur Radio W5YR, in the 56t
Good point Jerry!!! I just looked at the voltage rating which is the dielectric flash over obviously in this case. I have seen them used to 500 watts, but of course the duty cycle is a factor in a la
I think I understand that the "internals" of both the BNC and the Type N connectors are the same! That is same pin and conductor size. Is this true? 73, Jim KH7M
Not true, the N connector pin is larger, maybe by a factor of 3 plus? Of course this is tricky, because of skin effect it is the area of the outside of the pin that is carrying the most current. Stua
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Thu, 11 Apr 2002 17:55:57 -0500
N males mate to BNC females without stretching the BNC female center pin excessively. Most of the pin pieces are larger in the N connector. The threaded ring of the N connector holds the connector pi
I have heated up both N and BNC connectors running high VSWR at powers as low as 200 Watts. The UHF connector does have a larger center pin. I melted a RG-8 cable with 200 Watts at 10:1 VSWR. I do no
I have been using BNC connectors here for about 15 years. I usually run 100 watts but have run as high as 600 (Tentec Hercules 444) and often run 300 (homebrew amp). I use a 4x1 coax relay that was d
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Thu, 11 Apr 2002 20:48:19 -0500
Yes the UHF has a fat center pin, but it has a rotten ground connection. I burned one black in a 2m mobile with only 18 watts many years ago. The ground connection is only as good as the ring is tigh
A BNC male will plug into a 50 ohm N female with a good fit, if you remove the bayonet from the BNC. The 50 ohm N will plug into a BNC female with no changes. All of the internal dimensions are very
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Fri, 12 Apr 2002 10:04:34 -0500
The mating parts of the pins of N and BNC are similar sizes. The rest of the pins are not. N is mostly air insulated so the outsides of the pin and socket beyond the mating portion is a different siz
There's absolutely no problem at HF for BNCs at 100W. I have a Waters MIL wattmeter that reads to 2000W that uses BNCs... not that I'd remotely consider putting that much power on it. BNCs have their