----- Original Message -----
From: "Charles Harpole" <k4vud@hotmail.com>
To: <amps@contesting.com>
Sent: Wednesday, May 02, 2012 1:40 PM
Subject: [Amps] brittle shields? and soldering vs crimping
>
> Has anyone on Planet Earth ever heard of copper or tined copper "becoming
> brittle" due to heat?
>
>
>
> And what about the report of not soldering the center conductor because of
> the use of high power and 70 ohm coax?
>
What report was that or were you still half asleep when you read it?
Carl
KM1H
>
>
> Was I naping when some passed the ham test? 73,
>
>
>
> Charles Harpole
> k4vud@hotmail.com
>
>
> ----------------------------------------
>> Date: Wed, 2 May 2012 10:12:37 -0700
>> From: k2vco.vic@gmail.com
>> To: amps@contesting.com
>> Subject: Re: [Amps] soldering vs crimping
>>
>> It's not tricky if you have three things:
>>
>> 1) The right soldering iron. I have a Weller W100P that I use for this.
>> It's also handy
>> for copper tubing and strap in tank circuits, etc. It has a large thermal
>> mass so that the
>> heat is transferred to the connector quickly, and is also temperature
>> controlled.
>>
>> 2) Decent connectors. You need these anyway! I have some that I inherited
>> that solder
>> doesn't stick to.
>>
>> 3) Decent coax, with good braid coverage. Again, you need this anyway.
>>
>> On 5/2/2012 9:51 AM, Dick Green WC1M wrote:
>> > I'm with Carl on this one. Actually, the crimp N-connectors I use have
>> > center pins designed to be crimped *and* soldered -- there's a little
>> > hole
>> > in the side for soldering. I've found that there's so much variation in
>> > center conductor size that crimping *and* soldering makes for the most
>> > secure connection. The UHF crimp connectors I use all require soldering
>> > for
>> > the center conductor -- you can't crimp it. As for the shield, there's
>> > no
>> > question in my mind that crimping is superior to soldering. It's very
>> > difficult to properly solder shield braid without overheating it and
>> > melting
>> > the dielectric. I'm not saying it can't be done -- only that it's
>> > tricky.
>> > I've only had a few solder connector failures over the years, but
>> > they've
>> > all involved either deformation of the dielectric due to overheating,
>> > or
>> > breaking of the shield because it became brittle after soldering.
>> >
>> > 73, Dick WC1M
>>
>>
>> --
>> Vic, K2VCO
>> Fresno CA
>> http://www.qsl.net/k2vco/
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