Wednesday, May 3, 2017

Variable Capacitor for ham radio

A short posting with pictures of variable capacitors made using a CNC machine by 9W2CEW. The CNC cut both the rotor (moving plates) and stator (stationary plates) in one go. Refer to the last picture below.

This design is usually found in loop antenna to change the capacitance value from the shaft.





Side view

Variable caps with laser cut cover

0.7 mm aluminium plates

4 comments:

  1. NICE GOING. BIG VARIABLE CAPS GETTING TOO COSTLY + YOU CAN "ROLL UR OWN" TO FIT UR CKT.

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  2. Looks interesting to me! What was the capacitance (range) you are getting with this?

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    Replies
    1. My next blog entries have the capacitance values

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