Steve Katz wrote:
> Sure, use the right connector! :-P
>
> There are dozens of different model type N connectors. I avoid the RFX
> ones for the reason sited and also because the braid clamp is "shiny"
> and slippery and allows the clamp to rotate against the braid, which it
> should not do. "Astroplate" weathers great and connectors unprotected
> outdoors look brand new 10 years later -- but it's just not great in
> many other ways.
>
I'm pretty sure those are the ones that turn a rough, dusty, bluish
green around here. Nickel plate is terrible and silver just disappears.
That's the main reason I never worry about turning connectors into
permanent attachments and use the flooded heat shrink. IT also keeps
them nice and clean. Now if the crimping bands were readily available
those connectors could easily be reused as I normally solder the center pin.
73
Roger (K8RI)
> I use silver plated UG-21D/U (real mil-spec) type Ns, mostly from Kings
> or Delta, sometimes Amphenol or Trompeter. If you know Joel at The RF
> Connection in MD, he knows enough about connectors to know which ones
> will tightly clamp and fit RG213/U and which ones won't. The "good
> stuff" costs more. ;-)
>
> 73
>
> Steve WB2WIK/6
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of TexasRF@aol.com
> Sent: Wednesday, March 10, 2010 3:02 PM
> To: towertalk@contesting.com; w4lde@numail.org
> Subject: Re: [TowerTalk] N - clamp style connector
>
> Steve, your info is very timely as I encountered that very problem today
>
> while building a 70cm 2 way power divider with RG213/u.
>
> Do you have a solution for the loose fitting nut?
>
> 73,
> Gerald K5GW
>
>
>
>
> In a message dated 3/10/2010 4:46:45 P.M. Central Standard Time,
> stevek@jmr.com writes:
>
> As someone who's actually set up assembly lines to install Type N
> military connectors for USAF contracts (20+ years ago!), I might add
> one
> of the biggest problems hams have is misapplication of connector vs.
> coax. Even a skilled expert who's assembled thousands of N connectors
> on cables is going to be highly challenged if the right materials
> aren't
> presented to him.
>
> As an example, I see a lot of hams using the UG-21D/U connectors from
> the Amphenol "RFX" series (82-202-RFX or equivalent). You might note
> those are intended for "RG8, RG9, RG213, RG214" cables. Well, this is
> downright impossible. RG8 and RG213 are single shielded and smaller in
> O.D. than RG9 and RG214 which are double-shielded. For a "clamp"
> connector, how can a single design work for cables having either one or
> two shields, and having two different O.D.s? Impossible.
>
> So what Amphenol did, in their infinite wisdom, was make the connector
> suitable for double shielded cable with a larger O.D., and figured
> somehow we'd make that work for the other stuff. It really doesn't.
>
> If you use one of these connectors (or hundreds of varieties like them)
> you'll find that on single braided cable like RG213, or 9913 or LMR400
> etc, the clamp does not clamp tightly (it clamps loosely, even with the
> nut fully tightened) and there's a gap between the jacket of the cable
> and the hole in the rear nut. That's 'cause the cable's not right for
> the connector.
>
> Now use the same connector, but with RG214/U, having two braids and the
> proper O.D. What a difference! The clamp clamps very tightly, before
> the nut is fully threaded into the connector body, and the hole in the
> rear nut just barely passes the cable -- after assembly, there is no
> visible gap there at all.
>
> WB2WIK/6
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of w4lde
> Sent: Wednesday, March 10, 2010 2:37 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] N - clamp style connector
>
> Thanks to all that replied, I remember that I never had soldered the
> shield and thought that was the correct method.
>
> I will also as many have suggested use some heat shrink for stability
> as
>
> well as helping with water intrusion. Was planning on #33 or #88 tape
>
> plus some fusion style tape to help with the final connections.
>
> Again thanks to everyone for your comments.
>
> 73 de
> Ron W4LDE
>
>
> On 3/10/2010 3:18 PM, TexasRF@aol.com wrote:
>
>> Ron, the clamping ring for N connectors is nickel plated. You will
>>
> turn the
>
>> coax to charcoal before successfully soldering the shield to it.
>>
>> One of the major failure modes with N connectors is having the shield
>>
> work
>
>> loose due to pulling and twisting the cable. A short piece of heat
>>
> shrink
>
>> tubing over the clamping end of the connector and a couple inches of
>>
> the
>
>> coax will provide excellent reinforcement and improved reliability.
>>
>> The recommended connector installation procedure has worked very well
>>
> for a
>
>> lot of years.
>>
>> 73,
>> Gerald K5GW
>>
>>
>>
>>
>> In a message dated 3/10/2010 12:00:01 P.M. Central Standard Time,
>> w4lde@numail.org writes:
>>
>> Just getting ready to install some a new beam and coax plus N style
>> male connectors on a new tower. It's been awhile since I last used
>>
> one
>
>> (N style) and have reviewed via the WEB and the ARRL handbook
>> recommended installation methods and find two different methods with
>> respect to the barrel and shield connection.
>>
>> The barrel I am referring to is the small piece were the shield is
>> folded back over and then compressed and held in place by a O-ring,
>> washer and screw in clamp.
>>
>> The ARRL handbook does not call for any solder of the shield to the
>> barrel peace but on one ham web sites recommends that the shield be
>> soldered to the barrel insert piece and then assembled the same way
>>
> as
>
>> the non soldered. If I remember and it has been some time since I
>>
> used
>
>> N type but I believe I did not solder the shield but relied on the
>> compression and clamp fittings to make good contact from the shield
>>
> to
>
>> the N fitting.
>>
>> Would appreciate your opinion, to SOLDER or NOT to SOLDER.
>>
>> 73 de
>> Ron W4LDE
>> _______________________________________________
>>
>>
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