Fw: 50 vs 75 ohm N-connectors

[Ken Kopp-2]

Jim's correct - There ARE differences between 75 and 50 ohm coax
connectors ... especially Type N.

73! Ken Kopp - K0PP
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or
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----- Original Message -----
From: Jim Price
To: 'Larry' ; 'w2bvh'
Cc: [hidden email]
Sent: Sunday, October 15, 2006 4:19 AM
Subject: RE: [Elecraft] 50 vs 75 ohm N-connectors


Not so.  There is a very real physical difference between 50-ohm and
75-ohm
type N connectors.  The 50-ohm male pins are bigger than the 75-ohm pins
and
will damage a 75-ohm female connector.  Likewise if a 75-ohm male is
mated
with a 50-ohm female there will not be good electrical contact.

73,
Jim - N4ST

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Larry
Sent: Saturday, October 14, 2006 23:56
To: w2bvh
Cc: [hidden email]
Subject: Re: [Elecraft] 50 vs 75 ohm N-connectors

w2bvh wrote:
>
> Does someone know how to tell a 50 ohm from a 75 ohm "N"?
>
>
The impedance is a characteristic of the coax cable, not the connector.
What does matter is what coax cable(s) the N connectors are designed
for,
such as RG8, RG58, RG214, etc. Take a look at
http://www.smelectronics.us/typencableconnectors.htm. This might help
you
match your connectors to their appropriate cables.

73
Larry
KB5DXY
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[John Lonigro]

Actually, that's the main reason Type N's are better for VHF/UHF.  
There's no impedance bump in the feedline at the joints.  Not true for
PL259's.

73's,
John AA0VE

Ken Kopp wrote:
> Jim's correct - There ARE differences between 75 and 50 ohm coax
> connectors ... especially Type N.
>
> 73! Ken Kopp - K0PP
> [hidden email]
> or
> [hidden email]
>
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[Geoffrey Mackenzie-Kennedy-2]

 True, it is also much easier to weatherproof N connectors than 'UHF'
connectors when used outside.

73,
Geoff
GM4ESD.


John R. Lonigro wrote:

> Actually, that's the main reason Type N's are better for VHF/UHF.  There's
> no impedance bump in the feedline at the joints.  Not true for PL259's.
>
> 73's,
> John AA0VE
>
> Ken Kopp wrote:
>> Jim's correct - There ARE differences between 75 and 50 ohm coax
>> connectors ... especially Type N.
>>
>> 73! Ken Kopp - K0PP

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[Bob Nielsen]

On Oct 15, 2006, at 4:23 AM, John R. Lonigro wrote:

> Actually, that's the main reason Type N's are better for VHF/UHF.  
> There's no impedance bump in the feedline at the joints.  Not true  
> for PL259's.

I've used Type N connectors at 10 GHz--you learn to assemble them the  
right way pretty quickly doing that.

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[Ken Kopp-2]

UG-1185's are ... in my opinion ... very easy to assemble.

Ken Kopp - K0PP
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