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In the Forum: Melquiades Amplifier
In the Thread: Staxquiades project
Post Subject: Magnetic induction stabilizersPosted by N-set on: 9/28/2012
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 Romy the Cat wrote: |
| I would certainly avoid a taper that all time runs across the wires of the transformer and constancy adjusts voltage. I do not insist that it is the best way to do the things but my experience with variac was not so encouraging. |
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And you are probably right--maintaining the high quality of the wiper-winding contact under 1kW+ load is difficult.
But there seems to be a way around it--I've found a somewhat cooler idea-- the magnetic induction AVR:
http://www.ustpower.com/Support/Voltage_Regulator_Comparison/Mechanical_Voltage_Regulator/Magnetic_Induction_Voltage_Regulator_Operation.aspx
Quote from the same site: "...the servo induction voltage regulator also provides a very smooth output
voltage compared to the discrete switching that occurs in tap changers".
Attractive! Smooth operation, no mechanical contacts to the windings, by construction there will be a high leakage between the primary and the secondary--good, less to no coupling at HF. I'm trying to see if there is any reasonable commercial unit available--DIYing sth. like that would be more difficult.
One must keep in mind that all those stabilization divagations come from my stupid desire to combine seemingly uncombinable: DC coupling + fixed bias of the driver....With cathode biasing the circuit would be self-balancing and would survive an atomic blast, but ...
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