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Owen Duffy wrote: On Sat, 8 Oct 2005 21:36:59 +0000 (UTC), "Reg Edwards" wrote: "Owen Duffy" wrote in message .. . On Sat, 08 Oct 2005 12:53:11 GMT, "Lee" wrote: Doesn`t work with a magloop!!!.....thanks anyway. Why is that? Owen ========================== Because there is only one phase - that which corresponds to the motor driving voltage. Call me thick, I still don't understand why you can't sample the RF V and I and feed them to a phase detector to provide an indication of whether to adjust the capacitor up or down to achieve resonance (V in phase with I). Owen -- Hi Owen, Of course you can sample the RF-V and I and use it to adjust the capacitor via the motor control circuits. The motor driving voltage is DC, and I don't understand the inferences in this example. Automatic antenna tuners work on this principle, and work well. Gary N4AST |
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