Hi Jim,
To my knowledge...
Series 1 & 2 control boxes for the early Ham-M produced 1957-1959 are not
compatible with any of the later model rotors.
Series 3, 4, and early series 5 boxes for the Ham-M produced 1959-1973 are
compatible but do not have an independent brake release switch.
Series 5 boxes for the Ham-II (brown cover or black & white cover) with the
gold faceplates are compatible and feature the independent brake release
switch.
All for the Ham-III, IV, & T2X boxes are compatible, the T2X boxes added LED
indicators beginning in 1977.
Hope this helps.
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
W7RY
Sent: Wednesday, May 14, 2014 8:01 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Hy-Gain Rotor Control Boxes
Is there any difference in the old Hy-Gain metal cased rotor controllers and
the newer black plastic controllers?
Thanks
73
Jim W7RY
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