currently two 306 at home to drive my harbeth ls3/5a. both lend by friends to play around a bit. one is 1986 vintage and in original condition - sprague 4700uf psu caps, itt for c7, transformer hums slightly. the second one is 1989 vintage and recapped last year - nichicon ls 6800uf psu caps and...
Thanks MJS. All resistors checked yesterday - they measure ok and same values on both channels (with little tolerance of course).
So - now I’m searching for one (or better two to have an equal pair…) of Naim tested lm317. Anyone?
Many thanks. Colour code of resistors is identical for both channels. Then most likely the 317 as you describe. Should they be changed as pairs or just the faulty channel?
Tants measure ok but I’ll do as Martin suggest 👍
One output is 24 (ok I guess) and the other 29V. All caps measure ok, so do the resistors of the ok channel.
The resistors of the defective channel and resistance between the connections of the voltage regulator measure strange as if the regulator has been damaged.
What could have happened? And...
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