Topband: Rather use N-type (was Re: The answer to PL-259

[Martin Kratoska]

Harris uses BNCs at this power level (3CX-1500A7) in RF-353 (AM-7224) 
amplifier. They were used under harsh conditions for decades.

73,
Martin, OK1RR


Dne 08. 12. 18 v 3:07 Tim Duffy napsal(a):
> When you look at an N connector, specifically the center pin - remember that
> the N connector center pin is the same as the center pin of a BNC connector.
> 
> W6NL asked me this question - would you run 1500 watts with BNC connectors?
> 
> 73
> Tim K3LR
> (Only 7-16 DIN and TONS of "quality" UHF connectors at this station
> TIGHT PL-259s work GREAT - tighten up)
> 
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Mike
> Waters
> Sent: Friday, December 07, 2018 8:57 PM
> To: Frank Donovan; topband; Steve Maki
> Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259
> 
> Thank you, Frank and Steve! I just learned something useful. :-)
> 
> I bought these N plugs in the early 1980s from Nemal Electronics. Perhaps
> what you are describing was not available then? (That's a rhetorical
> question. ;-)
> 
> If I ever get back on VHF/UHF, I'll get those.
> 
> 73, Mike
> www.w0btu.com
> 
> 
> On Fri, Dec 7, 2018 at 7:26 PM <donovanf at starpower.net> wrote:
> 
>> Hi Mike,
>>
>> Captivated pin N connectors for hardline coax fits tightly over
>> the center conductor.
>>
>> Captivated pin N connectors for flexible coax typically has a
>> pin that requires solder.
>>
>> Floating pin N connectors belong in the trash bin.
>>
>> 73
>> Frank
>> W3LPL
>>
>> ------------------------------
>> *From: *"Mike Waters" <mikewate at gmail.com>
>> *To: *lists at oakcom.org
>> *Cc: *"topband" <topband at contesting.com>
>> *Sent: *Saturday, December 8, 2018 12:10:38 AM
>> *Subject: *Re: Topband: Rather use N-type (was Re: The answer to PL-259
>>
>> The one I have in my hand has a solder hole in it. I take it that there
> are
>> newer ones that have contacts that grip the coax center conductor?
>>
>> 73, Mike
>> www.w0btu.com
>>
>> On Fri, Dec 7, 2018 at 6:04 PM Steve Maki <lists at oakcom.org> wrote:
>>
>>> Well here's the advantage of captivated center pins: the pin is NOT
>>> bonded to the center conductor. IOW, if the coax center conductor
>>> shrinks a bit, it can slide in the center pin and the pin stays put.
>>>
>>> And that's exactly what you want it to do - especially with an N
>> connector.
>>>
>>> -Steve K8LX
>>>
>>>
>>> On 12/07/18 14:25 PM, Mike Waters wrote:
>>>
>>>> Exactly my experience, even with captivated pins!! And my coax runs
>> were
>>>> only about 100' long.
>>>>
>>>> The captivating washers were made of TeflonR, *and Teflon cold flows*.
>>> This
>>>> was when I lived in Toledo, Ohio when the temperature dropped well
>> below
>>>> zero.
>>>>
>>>> Four photos of those N connectors are at
>>>> http://www.w0btu.com/files/misc/N_plugs . See the last two.
>>>
>>>> On Fri, Dec 7, 2018, 1:02 PM Richard (Rick) Karlquist <
>>> richard at karlquist.com>
>>>> wrote:
>>>>
>>>>> My two 500 foot RG-216 military surplus cables both eventually
>> exhibited
>>>>> retracted pins on the type N connectors at both ends.  I replaced
> them
>>> with
>>>>> PL-259's.  ...  Success anecdotes about install once and never touch
>>> again
>>>>> commercial sites are probably not relevant to ham applications.
>>>
>>> _________________
>>> Searchable Archives: http://www.contesting.com/_topband - Topband
>>> Reflector
>>>
>> _________________
>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
>>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
> 
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
>