BNC Question -- sort of

D

Don Lancaster

Guest
What do you call a somewhat BNC like connector that has a PAIR of male
and female balanced connectors in it?

Does not seem to answer to "Horace".

--
Many thanks,

Don Lancaster
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
voice: (928)428-4073 email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com
 
On Thu, 30 Sep 2004 13:40:58 -0700, Don Lancaster <don@tinaja.com>
wrote:

What do you call a somewhat BNC like connector that has a PAIR of male
and female balanced connectors in it?

Does not seem to answer to "Horace".
Click to expand...
Do you mean a single twisted pair + shield? "Twinax."

Pasternack PE4238 maybe.

John
 
On Thu, 30 Sep 2004 13:40:58 -0700, Don Lancaster <don@tinaja.com>
wrote:

What do you call a somewhat BNC like connector that has a PAIR of male
and female balanced connectors in it?

Does not seem to answer to "Horace".
Click to expand...
---
Got a picture or a manufacturer and part number?

--
John Fields
 
I read in sci.electronics.design that Don Lancaster <don@tinaja.com>
wrote (in <415C6F5A.3864D857@tinaja.com>) about 'BNC Question -- sort
of', on Thu, 30 Sep 2004:
What do you call a somewhat BNC like connector that has a PAIR of male
and female balanced connectors in it?

Does not seem to answer to "Horace".
Click to expand...
No, it wouldn't. If it's both male and female, it would have to be
'Robin' or 'Sydney' or 'Martin'....

Does it have two pins/sockets in each of four outer tubes or...?
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
maxfoo wrote:
On Thu, 30 Sep 2004 13:40:58 -0700, Don Lancaster <don@tinaja.com> wrote:


What do you call a somewhat BNC like connector that has a PAIR of male
and female balanced connectors in it?

Does not seem to answer to "Horace".

Twinax has two pins in the center like the pic below.
http://www.amphenolrf.com/products/twinax.asp

However, you are describing 4 pins in the center...hmmm...interesting...
Click to expand...
Does not look at all like the above.

Outside looks exactly like BNC.
Inside dielectric is split in half with a step.
Low step has gold pin. High step has gold socket.

From a 1990's era automatic test set.
Ordinary BNC's went through special transformers to these connectors
which went to a special rf switch.
Rest of circuit board consisted of zillions of reed relays and LED's.

DCM brand.
--
Many thanks,

Don Lancaster
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
voice: (928)428-4073 email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com
 
Tom Woodrow wrote:
It is still a Twinax connector. We used that by the 1000's when I was at
Aydin Energy Systems for differential inputs. They were not that reliable.

Tom Woodrow
Click to expand...

Some call them twin-BNC to differentiate from Twinaxial, I suppose.
Here's an example from Lcom. I bought a few of these once and haven't
used them yet.


http://www.l-com.com/jump.jsp?lGen=detail&itemID=3978&itemType=PRODUCT&iProductID=3978

--
_____________________
Christopher R. Carlen
crobc@earthlink.net
SuSE 9.1 Linux 2.6.5
 
On Friday 01 October 2004 11:36 am, John Smith did deign to grace us with
the following:
The rep was wrong.
Click to expand...
What??!?!??!! Naaaahhhhh ...... ;-)

"BNC" stands for "Bayonet Neill-Concelman" which was
designed 40 years ago by two engineers at Bell Labs and Amphenol who were
searching for a constant-impedance coaxial connector. Paul Neill and Carl
Concelman went on to design six of the most widely used connectors in the
microwave realm.

I paraphrased the above from chapter 5 in "The ARRL UHF/Microwave
Experimenter's Manual" written by Dr. Paul Shuch, N6TX.

"TNC" is for "Threaded Neill-Concelman" and type "N" is for "Neill".

Thanks for this - very enlightening! (although, we haven't answered Don
Click to expand...
Lancaster's question yet, that I know of.)

Cheers!
Rich
 
I read in sci.electronics.design that Guy Macon <http@?.guymacon.com>
wrote (in <10lroojpmjr5i18@news.supernews.com>) about 'BNC Question --
sort of', on Fri, 1 Oct 2004:

Can anyone confirm that the British Navy used this connector as a
standard?
Click to expand...
It's most unlikely that just one connector would be singled out for that
honour. In any case, it would have been called 'RNC', for '**Royal**
Navy Connector'.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
I read in sci.electronics.design that Rich Grise <null@example.net>
wrote (in <l4s7d.2267$eq1.1653@trnddc08>) about 'BNC Question -- sort
of', on Sat, 2 Oct 2004:
TNC is a little
tiny, about 1/2 scale BNC, unless it's the little tiny 1/2 scale N or F.
Click to expand...
TNC is just like a BNC but with a threaded shell instead of a bayonet.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
Tom Woodrow wrote:
It is still a Twinax connector. We used that by the 1000's when I was at
Aydin Energy Systems for differential inputs. They were not that reliable.

Tom Woodrow
Click to expand...

Good call! I was wondering what on Earth the polarization is for- and
that is to prevent signal mixing and maintaining signal integrity in
computer networks:
http://www.amphenolrf.com/products/twinax.asp
 
Fred Bloggs <nospam@nospam.com> says...

I have a short history of RF connector development
written and re-written by Hewlett-Packard from the 50's,
Click to expand...
Would you be so kind as to give us the title, author, copyright date,
ISBN number, address given for Hewlett-Packard, etc. so that I can
verify this claim? Thanks!

--
Guy Macon <http://www.guymacon.com>
 
Guy Macon <http://www.guymacon.com> says...
Fred Bloggs <nospam@nospam.com> says...

I have a short history of RF connector development
written and re-written by Hewlett-Packard from the 50's,

Would you be so kind as to give us the title, author, copyright date,
ISBN number, address given for Hewlett-Packard, etc. so that I can
verify this claim? Thanks!
Click to expand...
I couldn't help noticing that Mr. Bloggs hasn't answered this, despite
lots of activity elsewhere in the newsgroup. I am beginning to have
certain suspicions...
 
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