[R-390] Mini BNC

[Tisha Hayes]

Here is what I wrote to the list in December 2008 on the connectors;

QUOTE:









*"I finally found out what the mini BNC connectors on the R-390A are
designated as. This has been a question asked by many on the R-390A
reflectors and on the Hollow State News, no answer was readily apparent.
Since I have a large amount of coaxial inter-series adapters as part of my
professional work, I decided to pursue an answer to this question through
the Amphenol tech-rep. Here is what I found out; The series connector is
designated as MB. It is not rated for a specific impedance like 50 or 75
ohms. The specification has a wide variety of impedance's that the
connector will work with, ranging from 50 to 150 ohms. I also found that
the connector, chassis plug, Tee's and terminators are still available
through a variety of sources. Since this is a little-known specification
without any widespread knowledge of it's applications the parts are
available cheaply from some surplus sites. At the higher end, there are
still suppliers who can make custom cables with the MB connector. One
surplus site that has the connectors is Surplus Sales of Nebraska. Of
course, their prices are on the high end of what is considered surplus but
they have a decent array of connectors. This can be found
at http://www.surplussales.com/Connectors/MB.html
<http://www.surplussales.com/Connectors/MB.html> These are a direct fit and
I have purchased connectors and tested them on my R-390A. This may be a
great tip on rebuilding the R-390A when the coax cables are seriously
deteriorated or when connectors are badly corroded."*

ENDQUOTE:
-- 
Ms. Tisha Hayes. AA4HA

 *"There are many who live in the mountains and behave as if they were in
the town; they are wasting their time. It is possible to be a solitary in
one's mind while living in a crowd; and it is possible for those who are
solitaries to live in the crowd of their own thoughts."*
*-Amma Sarah of the Desert*