[R-390] The final word on the R-390A mini-bayonet connector

[Tisha Hayes]

Here is a bit more information on the MB connector. I found several
suppliers who can provide connectors. At Hutton Communications they carry
the connector from RF Industries. I was able to pull a data-sheet and
pricing (about $6 each). Here is the link to their web site;

http://www.hol4g.com/ac/Product.aspx?number=RFI-RFM-2000&p=164805&sc=3886

>From other sources these are also known as "Kings KM-59-23" or "Dynair 921
22133 01". A quick search of the RF Industries web site will show the cross
reference information to RFM-2000.

The bulkhead female connectors I purchased are in Ampenol original packaging
with the product ID shown as 554/67/555 and others with 554/67/556. From
Amphenol there is no longer a trail to a currently manufactured component. I
belive that there is still some number of MB connectors left over from old
stock to give us some options going forward for repairs. From other
suppliers,  I have found sources for the cable connectors, chassis mounts, T
connections,covers, terminations and inter-series adapters to BNC.  If doing
searches for this connector it is important to remember that it is called
"Mini-Bayonet" and not BNC. You cannot look for a connector by it's
impedance as the MB connector really doesn't fit any defined characteristic
impedance.

Some of the Mini-Bayonet connectors also appeared to have been made by
"Automatic Metal Products Corp" with date stamps from 1967. There is not a
product code shown on the connectors. Automatic Metal Products Corp (out of
Brooklyn NY) appears to have made quite a few RF components for NASA, the
aerospace industry and military contracts. Somewhere along the line they
disappeared off the face of the earth (pun intended since they made things
for the space program).

The RFM-2000 part number is shown as part of a Carnare LV-61S series (this
contains a great many of the more common connectors we are used to. Only the
RFM-2000 has a description of "Mini Bayonet" "Mini Bayonet Female Crimp
Cable Jack; Kings KM-59-23".

There seems to be a variety of coaxial cable types supported by the RFM-2000
connector. Including; RG-59, 59A, 59B, 62, 62A, 62C/U; Alpha 9059, 9062,
9830, 9840, 9845; Belden 8221, 8241, 9169, 9204, 9228; Canare LV-61S;
CommScope 5555, 5560, 5563

I hope this helps,

Tisha
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