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Old 14th May 2022, 11:13 pm   #5
turretslug
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Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,085
Default Re: Nordmende Globetrotter 808 output stage problem.

My impression was that Leon was saying that connecting the base of the Vbe multiplier to the wiper alone was distinctly unwise- a similar vulnerability arises quite frequently in PSU designs where loss of contact causes the comparator to drive the output full high. Instead of which, the variable component should be rheostat-connected (with one end connected to the wiper for safety) in the lower (base-emitter) arm of a re-configured divider with a fixed resistor in the upper arm.
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