Hope this is ok to post but I have seen rotor talk on here before

I just picked up an old CDE AR22R rotor and controller It is missing the choke for the pulse switch from the rotor to the controller anybody ever have to replace one of these or know the value ?? In the drawing it is labeled CH and part #A52 50426-00 and I cant find anything on it Thanks in advance to all that read and reply Howard VE4ISP