On 5/3/2012 1:05 PM, Dick Green WC1M wrote:
>>> First of all I would like to correct a small misconception about the
>>> little side hole in the center pin of all connectors: it is there to
>>> provide a visual verification of the placement of the central wire,
>> NOT for soldering!
>>
>> It's good for both !!! Visualy confirm the placement, and then it
>> makes for a great way to get solder into the joint.
> Right, and I'm not sure there's a better alternative to using the hole. The
> only other way to solder the center pin is to leave a small space between
> the opening of the pin and the dielectric, heat the pin, then apply solder
> along the ridge of the pin opening so that the solder is drawn into the pin
> (not unlike sweating pipe joint.) But I checked the drawing from one
> manufacturer, RF Connectors, and they specify that the pin must be butted up
> against the dielectric. If you do that, there's no way to get solder into
> the pin other than through the hole.
If I've followed correctly so far:
We're talking N connector center pins. I trim every thing to length and
then solder and/or crimp the pin to the the center conductor. Then
insert the cable until the center pin bottoms out. This works solder,
crimp, or both. Once the center pin is bottomed out I crimp the outer
braid on. The connector goes between the foil and braid, the crimp band
goes over the braid and over a tiny bit of jacket.
The center pin must bottom out. Otherwise on vertical runs the center
conductor can move which often makes for a poor connector to connector
connection at the top.
73
Roger (K8RI)
>
> 73, Dick WC1M
>
>> -----Original Message-----
>> From: donroden@hiwaay.net [mailto:donroden@hiwaay.net]
>> Sent: Thursday, May 03, 2012 7:35 AM
>> To: amps@contesting.com
>> Subject: Re: [Amps] soldering vs crimping
>>
>> Quoting Alex Eban<alexeban@gmail.com>:
>>
>>> First of all I would like to correct a small misconception about the
>>> little side hole in the center pin of all connectors: it is there to
>>> provide a visual verification of the placement of the central wire,
>> NOT for soldering!
>>
>>
>>
>>
>> It's good for both !!! Visualy confirm the placement, and then it
>> makes for a great way to get solder into the joint.
>>
>> I've been doing "N" s like this on commercial TV and FM coaxes running
>> 1KW+ for over 40 years and have never had a problem with a joint
>> constructed like this.
>>
>> I also fan the braid and use a 300 watt gun to tin the braid in a ring
>> around the dielectric. The secret is a hot gun, and freeze spray after
>> the solder hardens... that way, no dielectric deforming. You
>> will get good after a few trials. A second person rotating the coax
>> is very helpful.
>>
>>
>> Then I trim the soldered braid with a side cutter and then assemble
>> the connector. No chance of shorted connectors due to small pieces
>> of braid ...... and when assembled, and during "scientific testing"
>> the connector will support over 200 pounds.
>>
>> Don W4DNR
>>
>>
>
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