[450] Quick disconnect at the bulkhead

[George Andrews]

Check the 874 type connector. I don't know about power rating. These were originally on General Radio Test equipment from the age of dinosuars. I have a specimen and would not use it for anything much more than QRP and there it is too much bulk. Check them out anyway.http://www.deltarf.com/pdf/Delta874.pdf Some might get excited about these as they are politically correct. They are sexless or hermaphroditic connectors.

HN connectors is what I originally had in mind but they are threaded http://www.deltarf.com/HN.html

There may be another possibility

Keep in mind what happens in T storms. Before lightning strikes, stuff happens. An electrical charge develops on your non dc shunt design antenna. An opposite charge builds up at some other point. This builds up until a difference of potential builds up which develops an ionized pathway to your antenna followed picoseconds later by a lightening strike. Maybe not pico, could be nano. It does not matter but you get the time scale thing. A number of antennae are dc shunt design. This bleeds off the charge so that the ionized pathway does not happen. That is why there are not as many lightening strikes as one would think. Ok, now we have other antennae. For these, the gas discharge inline dodads are the way to go. There are simpler types (Cushcraft that are a spark gap) which I would stay away from if you can afford to. If you look at old lightening protection info, an automotive spark plug was actually used. Anyway that is our primary protection against lightening as we can't always unplug when neccesary. 

George
N1YAE


  ----- Original Message ----- 
  From: David McKenzie 
  To: 144.450 Mailing List 
  Sent: Thursday, June 24, 2010 5:46 PM
  Subject: [450] Quick disconnect at the bulkhead

  I'd like something easier than unscrewing the PL259s at my bulkhead for thunderstorms. BNC comes to mind but doesnt have a native connector for the .400 diameter cable. I've also seen push-on quick disconnect UHF connectors (http://www.buxcomm.com/catalog/index.php?main_page=product_info&products_id=1876). I wonder if there is some middle ground?



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