[Milsurplus] Collins CU-991 AR Coupler - Correcting My Mistakes

Mike Morrow kk5f at earthlink.net
Mon Feb 15 20:03:12 EST 2010


I've dug out my 180L-2, CU-351/AR, and CU-991/AR and some documentation.
I need to correct some statements that I wrote on 04FEB2010.

Incorrect statements:
-----------------
I think the only difference between the military CU-991/AR and the
commercial 180L-3 is the type of front panel control/power connector.
But I may be wrong about the connector...my 180L-3 is in storage.

The CU-991/AR is the auto antenna tuner that goes with the AN/ARC-38
and -38A sets.  It is rated for 2 to 25 MHz.  It was also used with
later AN/ARC-94 and -102 (618T-2 and -3) sets (2 to 30 MHz) before
the wider frequency range CU-1669/AR was available.
-----------------

Corrected statements:
-----------------
The CU-991/AR appears to be identical to the commercial 180L-2, including
the same control connector.  The CU-991/AR was used with the AN/ARC-94 and
-102 until the CU-1669/AR was available.

The CU-351/AR appears to identical to the commercial 180L-3, except that it
uses some sort of Amphenol-type control connector in place of the Cannon-type
of the 180L-3.  The CU-351/AR was used with the AN/ARC-38 and -38A.
-----------------

Mike / KK5F


More information about the Milsurplus mailing list