[HCARC] Crimped vs Soldered Coax Connectors??

Thu Sep 25 16:41:17 EDT 2014

Gary,

Let's talk about something else.
You have run this thread into the ground!!!!!!

Thanks W5FBG

----- Original Message ----- 
From: "Gary J - N5BAA" <qltfnish at omniglobal.net>
To: "John K5XA" <k5xa at godfather-ridge.com>; "'kd5wdq .'" <kd5wdq at gmail.com>
Cc: "'Reflector'" <hcarc at mailman.qth.net>
Sent: Thursday, September 25, 2014 1:11 PM
Subject: Re: [HCARC] Crimped vs Soldered Coax Connectors??

> OK ALL - lets settle down - it's my thread and was/is intended to be 
> educational vs emotional.  Getting to where we call each other names and 
> get upset may just be the reason that so few ask questions here on the 
> Reflector and all that does is hurt those that benefit from the education. 
> As a group we have pretty much given up on the training sessions / Elmer 
> sessions before club meetings and we are endangering the use of this forum 
> as a learning tool too.
>
> I for one would miss the ability to ask a question.
>
> Gary J
> N5BAA
>
> -----Original Message----- 
> From: John K5XA
> Sent: Wednesday, September 24, 2014 1:32 PM
> To: 'kd5wdq .'
> Cc: 'Reflector'
> Subject: Re: [HCARC] Crimped vs Soldered Coax Connectors??
>
> In hopes that you'll waiver, and read this anyway, excuse the shit outta 
> me!
>
>
>
> But how about - it works for me!
>
>
>
> K5XA
>
>
>
>  _____
>
> From: kd5wdq . [mailto:kd5wdq at gmail.com]
> Sent: Wednesday, September 24, 2014 8:04 AM
> To: John K5XA
> Cc: Kerry Sandstrom; Reflector
> Subject: Re: [HCARC] Crimped vs Soldered Coax Connectors??
>
>
>
> OK, I give!  After this I will no longer comment on this.
>
>
>
> Apparently any excuse not to look at the data from a network
>
> analyzer counts for NOTHING!  Or some people refuse to
>
> believe the results, whatever.
>
>
>
> That or either some people still think that sense my father,
>
> grandfather use it, it MUST be good.  Or maybe they cannot
>
> understand the data, just not sure.
>
>
>
> How many people on this thread REALLY looked at that URL
>
> (above, 2 days ago)? And then understood the data?  If you
>
> did, you'd know that there are better, much better RF connectors.
>
> And the UHF sucks.  How many here know what "Constant
>
> Impedance" really-really means?
>
>
>
> I GIVE UP - seriously.  This has showed me some are set in
>
> there beliefs and cannot be changed even with hard data
>
> is given to them.
>
>
>
> Remember, what ever is written back, i'll NOT READ,
>
> any replies to this thread is getting dumped in the circular file
>
> before read.
>
>
>
> af5sa
>
>
>
> On Wed, Sep 24, 2014 at 1:42 AM, John K5XA <k5xa at godfather-ridge.com> 
> wrote:
>
> Just one more thing from me regarding PL-259 vs "N".
>
> Since getting my ticket in 1986 and gravitating towards HF contesting, I
> have had the opportunity to learn from some terrific contest operators, 
> and
> also to visit and/or operate at some very "big gun" stations. I'm talking
> about consistent top ten stations like at K1TO, K3LR, K5RZ, K5RX, K5TR,
> K5RC, etc, etc, etc.
>
> There may have been, but I cannot honestly remember any of them using "N"
> connectors.
>
> K5XA
>
> -----Original Message-----
> From: HCARC [mailto:hcarc-bounces at mailman.qth.net] On Behalf Of Kerry
> Sandstrom
> Sent: Tuesday, September 23, 2014 10:16 PM
> To: hcarc at mailman.qth.net
> Subject: Re: [HCARC] Crimped vs Soldered Coax Connectors??
>
> Gary,
>
> N connectors are not necessarily 50 Ohm.  Normally N connectors are 50
> Ohm to match 50 Ohm cable.  You can get N connectors which are 50 Ohm
> impedance but are for 75 Ohm cable, RG-11/U for instance.  In this case
> the connector impedance doesn't match the cable impedance.  You can also
> get N connectors which are 75 Ohm impedance for 75 Ohm cable, RG-11/U
> again for instance.  50 ohm N connectors for 75 Ohm cable have a
> mechanical interface identical to the 50 Ohm connectors for 50 Ohm cable
> and will mate with each other.  N connectors with a 75 Ohm impedance
> will not mate with 50 Ohm N connectors and will damage the connectors if
> you try it.
>
> A 75 Ohm N Plug is UG-94A/U and yes they turn up from time to time. A 50
> Ohm N Plug is for 75 Ohm cable is UG-603A/U for RG-59/U.  A UG-21B/U is
> a 50 Ohm connector for 50 Ohm cable such as RG-8/U.  The same situation
> exists for BNC connectors and yes there are some 75 Ohm BNC connectors
> around and no, they don't mate with 50 Ohm BNC connectors.
>
> While N and BNC and most other connectors have a specified impedance,
> UHF connectors are simply listed as non-constant impedance.  The
> impedance depends on the ratio of inner and outer conductor diameters
> and the dielectric.  If you look at the design of a PL-259, you should
> note that the ratio of diameters is different as is the dielectric at
> different points of the connector.  That is why they don't have a
> constant impedance and you really can't say they are 32 or 37 Ohm or
> whatever.  N connectors on the other hand do maintain a constant
> impedance through out the connector.
>
> Another factor is the voltage rating of the connectors.  UHF connectors
> are rated for 500 V RMS while N connectors are rated for 1000 V RMS.  A
> KW at 50 Ohm impedance with no SWR is about 240 V.I probably wouldn't
> use UHF for legal limit or high SWR.
>
> Delta Electrtonics makes over 20 different type N connectors for 50 Ohm
> alone for different types of cable, none of which are for foam
> dielectric or aluminum foil outer conductor.
>
> By the way, the Radiation Lab series has a section on the design of N,
> BNC and other connectors for anyone interested.  Most of the constant
> impedance connectors were designed during World War II primarily for
> radar applications.
>
> Have fun,
>
> Kerry
>
>
> On 9/23/2014 8:53 PM, Gary J - N5BAA wrote:
>> Again guys - I am approaching much of this from the standpoint of the
>> NEW guy, just starting out and without a large investment in time,
>> already made up coax,  and the proverbial "parts box" full of
>> PL-259/so-239 connectors, UHF barrel connectors, etc.  I work with as
>> many new guys as anyone in the club.  To them it's a significant
>> expense on top of everything else, and if you remember I admitted I am
>> one of those guys who still views proper soldering as an art I haven't
>> mastered yet.
>>
>> Kerry - why 37 ohm for PL-259 - because that is the number I hear
>> banty'd around for them.  I think I am correct in 50 ohm for the N
>> connector.  BTW, you should be happy - you have almost converted me to
>> the N whenever possible.  That and all my Alpha-Delta surge
>> suppressors have N connectors so it doesn't make sense to work backwards.
>>
>> Gary J
>> N5BAA
>>
>> --
>
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