Thursday, November 15, 2018

The 2 Uher 4200 in Pleiades labs


The one bought last operates on both channels.


The 1st one bought operated only on right channel.  A shorted psu decoupling electrolytic capacitor was the cause of one channel not operating. Just one capacitor. Now everything operates fine and it sounds fantastic.
18112112
There was some hum due to cold soldering
Changed capacitor to Frako 100μF 16V GPF  after reforming it with a series 1.6MΩ to 15V for 24 hours
No hum






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