stepper001 Posted February 25, 2011 Share Posted February 25, 2011 Hi, 1st post. Im not an engineer, but rather a learning amateur of Ham Radio. Im planning to build a Magnetic Loop for HF SSB phone. It is made of copper 28mm OD with a 3.2' inside diameter. The power used is 100W max and a gamma match is intended to be used, I want also to control the tuning over the 20-10mtr bands with Vaccume Variable Capacitor. Now the VVC Im looking at is a 2-100pf 5KV capacitor. What Im interested in learning is...how many turns does this type of capacitor take from completely meshed ( closed ) to fully open? When I find out this information I can ask about Stepper , Driver spec for the VVC. All good advice welcome, stepper001 Link to comment Share on other sites More sharing options...
TonyMcC Posted February 25, 2011 Share Posted February 25, 2011 (edited) It probably varies with different capacitors and/or manufacturers. You need a specification sheet (imo). One example is shown in fig.3 of the link showing 25 turns. (10 truns looking "useful"). http://www.hatdaw.com/papers/sb_12.pdf Edited February 25, 2011 by TonyMcC Link to comment Share on other sites More sharing options...
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