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OT: Pin migration in Type N connectors

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Ken Kopp-3

OT: Pin migration in Type N connectors

I use UG-1185's for almost all of my N males here.
They have a captive center pin.

Otherwise, center pin migration -can- be a problem
here in Montana with it's temperature extremes. (;-)

73! Ken Kopp - K0PP
[hidden email]

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Milt -- N5IA

Re: OT: Pin migration in Type N connectors

I have been using the Times series of crimp-on "N" male connectors with the
captive center pin for the past 10+ years. In particular, IMHO, the Times
EZ-400-NMH for use on LMR-400 has been a boon to the communications
industry.

My group has installed thousands of them for use at 2.4 GHz and 5.8 GHz. No
failures unless a tech made an install mistake with one of them.

As Ken has indicated, they are highly recommended because of the potential
pin migration problem AND for proper pin placement.

Good luck to all. Have a great weekend.

73 de Milt, N5IA

----- Original Message -----
From: "Ken Kopp" <[hidden email]>
To: <[hidden email]>
Sent: Friday, July 23, 2010 8:42 AM
Subject: [Elecraft] OT: Pin migration in Type N connectors

>
> I use UG-1185's for almost all of my N males here.
> They have a captive center pin.
>
> Otherwise, center pin migration -can- be a problem
> here in Montana with it's temperature extremes. (;-)
>
> 73! Ken Kopp - K0PP
> [hidden email]
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Elecraft mailing list
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dave-281

Re: OT: Pin migration in Type N connectors

Curious, how does one identify a 'captive' center pin from a
'non-captive' one?

I typically use the crimp-on type N's from RF Industries and wonder
which category those fall into. For those who are not familiar with
these connectors, the pins crimp onto the center conductor and then snap
into the shell.

73 de dave
ab9ca/4

Milt, N5IA wrote:

> I have been using the Times series of crimp-on "N" male connectors with the
> captive center pin for the past 10+ years. In particular, IMHO, the Times
> EZ-400-NMH for use on LMR-400 has been a boon to the communications
> industry.
>
> My group has installed thousands of them for use at 2.4 GHz and 5.8 GHz. No
> failures unless a tech made an install mistake with one of them.
>
> As Ken has indicated, they are highly recommended because of the potential
> pin migration problem AND for proper pin placement.
>
> Good luck to all. Have a great weekend.
>
> 73 de Milt, N5IA
>
> ----- Original Message -----
> From: "Ken Kopp" <[hidden email]>
> To: <[hidden email]>
> Sent: Friday, July 23, 2010 8:42 AM
> Subject: [Elecraft] OT: Pin migration in Type N connectors
>
>
>
>> I use UG-1185's for almost all of my N males here.
>> They have a captive center pin.
>>
>> Otherwise, center pin migration -can- be a problem
>> here in Montana with it's temperature extremes. (;-)
>>
>> 73! Ken Kopp - K0PP
>> [hidden email]
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>

Milt -- N5IA

Re: OT: Pin migration in Type N connectors

Dave,

That type you describe is "non-captive", as the center pin is not an
integral part of the connector body.

The crimp on pin, and "snap into shell" type still leave some margin of
error. If the tech gets the center conductor too long, there is a
possibility of the braid portion not being inserted enough to get proper
crimping action with the ferrule.

Additionally, the longer center conductor and pin allows a space to be
created between the foam dielectric and the dielectric between the center
pin and the connector body. This MAY cause problems.

YMMV, but if any install step or calculation which has to be performed by a
tech can be eliminated, the percentages of correct connections goes up.

Mis dos centavos.

Milt, N5IA

----- Original Message -----
From: "dave" <[hidden email]>
To: "Milt, N5IA" <[hidden email]>
Cc: "Ken Kopp" <[hidden email]>; <[hidden email]>
Sent: Friday, July 23, 2010 9:12 AM
Subject: Re: [Elecraft] OT: Pin migration in Type N connectors

>
> Curious, how does one identify a 'captive' center pin from a 'non-captive'
> one?
>
> I typically use the crimp-on type N's from RF Industries and wonder which
> category those fall into. For those who are not familiar with these
> connectors, the pins crimp onto the center conductor and then snap into
> the shell.
>
>
> 73 de dave
> ab9ca/4
>
>
>
>
> Milt, N5IA wrote:
>> I have been using the Times series of crimp-on "N" male connectors with
>> the captive center pin for the past 10+ years. In particular, IMHO, the
>> Times EZ-400-NMH for use on LMR-400 has been a boon to the communications
>> industry.
>>
>> My group has installed thousands of them for use at 2.4 GHz and 5.8 GHz.
>> No failures unless a tech made an install mistake with one of them.
>>
>> As Ken has indicated, they are highly recommended because of the
>> potential pin migration problem AND for proper pin placement.
>>
>> Good luck to all. Have a great weekend.
>>
>> 73 de Milt, N5IA
>>
>> ----- Original Message -----
>> From: "Ken Kopp" <[hidden email]>
>> To: <[hidden email]>
>> Sent: Friday, July 23, 2010 8:42 AM
>> Subject: [Elecraft] OT: Pin migration in Type N connectors
>>
>>
>>
>>> I use UG-1185's for almost all of my N males here.
>>> They have a captive center pin.
>>>
>>> Otherwise, center pin migration -can- be a problem
>>> here in Montana with it's temperature extremes. (;-)
>>>
>>> 73! Ken Kopp - K0PP
>>> [hidden email]
>>>
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>>

Ken Kopp-3

OT: Pin migration in Type N connectors

In reply to this post by dave-281

The pin of a UG-1185 has an obvious "flange" in
the approximate center of the pin, and there are
two TFE "washers" that hold them captive in the
body of the connector.

There are "cups" in the TFE washes that appear to
be for surrounding the "flange" on the pin. They're
not. The "cups" face -away- from the "flange", and
have nothing to do with positioning of the washers.

They're actually a form of "tuning" used to keep the
connector 50 ohms.

73! Ken Kopp - K0PP
[hidden email]

______________________________________________________________
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Post: mailto:[hidden email]

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