From tractorb at ihug.co.nz  Thu May 19 00:12:56 2016
From: tractorb at ihug.co.nz (Dave Brown)
Date: Thu, 19 May 2016 16:12:56 +1200
Subject: [Microwave] quarter inch hardline solder connectors
Message-ID: <12408F295C1B4B38904E297AF85ED4F2@athlon3200>

Any one know if the centre pins in these can be removed?
I've just recovered a few connectors that had a stub of hardline (RG401) 
left in them -which I have removed- along with the solid centre 
conductor-but the centre pin seems to be firmly fixed in place in the teflon 
inside the connector. Maybe I'm not pushing hard enough to remove it? (Don't 
want to damage anything!)
If the centre pin IS fixed then I'm not sure how you are supposed to solder 
it when terminating hardline in the connector.  Sweat soldering the outer 
seems routine enough but its odd if you have to leave the centre pin in 
place and rely on an unseeen sweat solder connection of the whole 
thing -inner and outer all at once- to terminate.
DaveB, ZL3FJ



From tractorb at ihug.co.nz  Thu May 19 01:02:08 2016
From: tractorb at ihug.co.nz (Dave Brown)
Date: Thu, 19 May 2016 17:02:08 +1200
Subject: [Microwave] quarter inch hardline solder connectors
References: <12408F295C1B4B38904E297AF85ED4F2@athlon3200>
	<AC16F36118604ABFAD325C65E91D7CA6@mainframe>
Message-ID: <80ECCD734C334ADFB4377816F7950900@athlon3200>

Tks Kurt
 I'm going to try pressing the pin out with a spare contact ex a female 
connector or something similar-yes there is a shoulder at the rear of the 
pin so will try to put pressure on that and drive the pin out backwards. 
Connector drawing here-
http://homepages.ihug.co.nz/~tractorb/172139_customer_drawing.pdf
The pin being shown separately in the drawing makes me think it should come 
out as well.
 The connectors are around $10 each at Digikey so its well worth recovering 
them.
DaveB, ZL3FJ




----- Original Message ----- 
From: "KD7JYK DM09" <kd7jyk at earthlink.net>
To: "Dave Brown" <tractorb at ihug.co.nz>; <microwave at mailman.qth.net>
Sent: Thursday, May 19, 2016 4:35 PM
Subject: Re: [Microwave] quarter inch hardline solder connectors


> It's been a while since I've worked on such things, but from my experience
> in the past, center pins are just pressed into the teflon, usually with 
> some
> length-wise ridges to prevent rotation.  I've seen this from the smaller 
> SMA
> connectors to PL-259 and N.
>
> In the past I've pressed them out, if big enough with a piece of metal 
> tube
> over the pin and pressing against the shoulder, if there is one.
>
> On small pins, I've risked pressing VERY carefully against the pin tip 
> with
> a metal rod or bolt or screw with a small vice.
>
> I've never had a problem, but there always COULD be one.
>
> Kurt
> 


From kd7jyk at earthlink.net  Thu May 19 00:35:26 2016
From: kd7jyk at earthlink.net (KD7JYK DM09)
Date: Wed, 18 May 2016 21:35:26 -0700
Subject: [Microwave] quarter inch hardline solder connectors
References: <12408F295C1B4B38904E297AF85ED4F2@athlon3200>
Message-ID: <AC16F36118604ABFAD325C65E91D7CA6@mainframe>

It's been a while since I've worked on such things, but from my experience 
in the past, center pins are just pressed into the teflon, usually with some 
length-wise ridges to prevent rotation.  I've seen this from the smaller SMA 
connectors to PL-259 and N.

In the past I've pressed them out, if big enough with a piece of metal tube 
over the pin and pressing against the shoulder, if there is one.

On small pins, I've risked pressing VERY carefully against the pin tip with 
a metal rod or bolt or screw with a small vice.

I've never had a problem, but there always COULD be one.

Kurt 


From kd7jyk at earthlink.net  Thu May 19 19:52:23 2016
From: kd7jyk at earthlink.net (KD7JYK DM09)
Date: Thu, 19 May 2016 16:52:23 -0700
Subject: [Microwave] quarter inch hardline solder connectors
References: <12408F295C1B4B38904E297AF85ED4F2@athlon3200><AC16F36118604ABFAD325C65E91D7CA6@mainframe>
	<80ECCD734C334ADFB4377816F7950900@athlon3200>
Message-ID: <9A385457494B4FCC92509FDEE778FA1F@mainframe>

: I'm going to try pressing the pin out with a spare contact ex a female
: connector or something similar-yes there is a shoulder at the rear of the
: pin so will try to put pressure on that and drive the pin out backwards.
: Connector drawing here-
: http://homepages.ihug.co.nz/~tractorb/172139_customer_drawing.pdf

I don't expect a problem with that.  A pin of that design has a "ridge" in 
the teflon that fits in the notch in the middle to hold it in place.  I 
wouldn't hesitate to press it out, although I would be careful and do it 
slowly.  I would try either a tube over the pin on the shoulder to prevent 
bending, or even just gentle pressure on the tip.  They press it in, so it 
"can" be pressed back out.

Regarding the female contact as a tool, if it has slits in it as most do, 
it's quite possible it can break and split apart which can cause problems 
with the connector you are trying to save, so be careful.

Kurt