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Shottky diodes instead of germanium in old analog meter
001:
Hi
I`m working with vintage AC voltmeter
The rectifier is two germanium diodes blown with galvanometer
I can buy new galvanometer but not new germanium diodes
Can I replace germanium with new shottky? :-//
001:
iMo:
The closest alternatives would be the BAT42/43/45/46. Unless you'll find the germanium ones, when pretty lucky
:)
PS: those BATxx diodes are small signal, max 30V or so, not to be used as rectifiers for higher voltages. Good around the galvanometer movement, imho.
duak:
Pease had an article on various diodes' forward voltage characteristics. I can't find the link to it now but I've attached a chart.
One thing to note is that large area devices, such as rectiiers, have a forward leakage current that can be significant at low voltages. This current could affect the accuracy of the meter.
001:
awesome!
Thanx1
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