NORM’S ROTOR SERVCE
Frequently Asked Questions (FAQ)
https://normsrotorservice.com/faqs.htm
4. What happened to CDE and Telex/HyGain?
The Cornell Dubilier Electronics (CDE) company sold their rotor division to Telex/Hy-Gain in 1981. Hy-Gain decided to support only the AR-22, AR-40, CD45-II, Ham-4, and Tailtwister rotors. All rights to the other rotors were assigned to Norm's Rotor Service.
Today we are the only facility with parts for the original units.
We have almost all parts for the AR-22, AR-33, AR-40, AR-50, BT-1, TR-44, CD-44, Ham-M, Ham-2, and Ham-3 rotors.
Telex/HyGain sold the HyGain line of rotors to MFJ in May of 1999 (Of course, we also have parts for the rotors that Hy-Gain continues to support.).
14. Can I use a Ham-2 rotor control box with my T2X rotor? Are the Ham-2, Ham-3, Ham-4 and T2X control boxes interchangeable?
Yes, for the most part, all of the 8-wire rotors except for the TR-2 series are interchangeable.
You can use a TR-44 series 3; Ham-M series 3, 4, or 5; CD-44/Ham-2; CD-44/Ham-3; Ham-4; or T2X control unit with any of the listed rotors or vice versa.
However, the Ham-M and TR-44 series 1 and 2 rotors were wired differently and are not interchangeable with anything else. So, trying to use a series 1 or 2 control on a newer rotor will destroy the rotor pot instantly.
To be sure that you have one of the interchangeable controls, verify that the motor start capacitor is across terminals 4 and 8. To verify that the rotor is one of the interchangeable models, look for the 500-ohm pot resistance across terminals 3 and 7.
IF your rotor and control unit pass these inspections, they are interchangeable with others which also pass.
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