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Old 06-14-2018, 03:50 PM
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benman94 benman94 is offline
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1N60 diode replacement for CBS 205

I'm gearing up for a restoration on a CBS 205 color set, and I've been told that the plastic case 1N60 diodes CBS used are extremely failure prone. Unfortunately, the 1N60 is long out of production. Could I sub a 1N60P, which is a silicon based Schottky diode?
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Old 06-14-2018, 04:22 PM
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I'm sure that you can.
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Old 06-14-2018, 04:33 PM
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My concern is the shunt capacitance. I think a germanium diode is typically a few tenths of a picofarad. A silicon Schottky has a shunt capacitance on the order of tens of picofarads.
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Old 06-14-2018, 05:39 PM
kf4rca kf4rca is offline
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Might want to read this HP application note on video diodes:
http://www.hp.woodshot.com/hprfhelp/...elit/an923.pdf
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Old 06-14-2018, 07:24 PM
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The junction capacitance of the 1N60 and 1N60P is only a fraction of the load shunt capacitance and there will be no noticeable difference using either.
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Old 06-14-2018, 07:59 PM
mrjukebox160 mrjukebox160 is offline
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Why not just use what belongs there: https://www.mikeselectronicparts.com/product/1n60/
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Old 06-15-2018, 04:13 AM
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Quote:
Originally Posted by mrjukebox160 View Post
Why not just use what belongs there: https://www.mikeselectronicparts.com/product/1n60/
They're NOS. New germanium diodes haven't been available for a while. I've had bad luck buying NOS 1N82As so when I can find a silicon replacement that will work for a given germanium diode, I typically run with it.
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Old 06-15-2018, 04:10 PM
mrjukebox160 mrjukebox160 is offline
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Ok.
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