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Old 8th Jul 2020, 2:09 pm   #35
turretslug
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Join Date: Nov 2011
Location: Surrey, UK.
Posts: 3,444
Default Re: High voltage regulator circuit.

TAA550 is a varicap tuning supply shunt regulator IC, temperature compensated 33V. A bit old hat but still around. High voltage "Zeners" have rotten temperature stability, you need to try them in a test rig to appreciate just how bad they are even well within their dissipation rating.

With PSUs, it's wise to imagine what happens if a variable resistor wiper goes open circuit (or maximum resistance if rheostat-connected to one end of the track)- generally, output going low is preferable to output going high!
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