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[AMPS] coax connector ratings

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Subject: [AMPS] coax connector ratings
From: Ian White, G3SEK" < (Ian White, G3SEK)
Date: Sat, 29 Sep 2001 09:07:28 +0100
2 wrote:
>>2 Wrote:
>>>Type-C connectors have more current carrying ability and more voltage 
>>>withstanding ability than Type-N. Type-C are moisture proof, and bayonet 
>>While that is true, they suffer from the same problem as BNC, in that
>>the bayonet locking force comes from compressing a rubber gasket, which
>>eventually softens and loosens the connector. 
>//  Silicone rubber is virtually non compressive. 
I used to use several C connectors which had come from testgear at a
local research facility. After several years of sitting in a rack, the
gaskets had compressed and you could spin the plugs quite freely in the
sockets...  exactly like an old BNC.

The problem with all bayonet-type mechanisms is that they cannot apply
maximum compression to the spring or gasket when locked - if they did,
you wouldn't be able to operate the twist-lock.

>>A better solution might
>>have been type SC ("Screw C") or LC but these always seem to have been
>//  Screws can loosen.

But you have control over that, unlike the ageing of a gasket.

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)

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