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Re: [TowerTalk] Identifying CDR rotator

Subject: Re: [TowerTalk] Identifying CDR rotator
From: Chuck Sudds <>
Date: Sun, 30 May 2004 19:27:14 -0500
List-post: <>
At 09:35 PM 5/30/04 +0000, wrote:

As Per Norm's Rotor Service FAQ below:

3. What is the difference in the Ham series of rotors?
The Ham-M rotor was released in 1957, and there were 5 series with the last rotor being produced in 1973. The Ham-M rotor would have the series number, 1 - 5, followed by 3 digits which indicated the week and year of manufacture. For example, a rotor with the series number 5 322 would be a Ham-M, series 5, manufactured in the twenty-second week (the '22' in '322') of the year 1973 (the '3' in '322').

Hope this helps.


got a CDR rotator and dont know what model it is as it came w/o the control box. In the bottom side of the rotator there is a separate 4 then separated from the 4 is 335. Does this mean it is a Ham4 and the seriel # iss 335? Also am looking for a control box for it. Thanks for reading.
Pete W2LL/W2YG


See: for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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