[sdiy] Clavinet C Preamp Problem

[Ingo Debus]

Am 10.10.2012 um 21:32 schrieb <tprivitera at nc.rr.com> <tprivitera at nc.rr.com>:

> Weird thing is, when I reverse the battery terminals, holding the battery on backwards for a while, then flip it back right, the Clavinet will work perfectly for about a minute or two, then a little static comes and the volume drops WAY back down again.  I can reliably repeat this process.

Sorry if this sounds like a dumb question, but are you sure you haven't got the battery polarity reversed? These days we're so used to it that minus is at ground, but in the old germanium days it was the other way around.

It can imagine that the circuit might work for a while being powered from the 100 uF cap (charged with correct polarity), even if the battery is wired backwards.

Ingo