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| Best replacement for U3 optocoupler Macintosh Plus ( International board ) |
Posted by: nvdeynde on 2017-12-03 02:43:35
I have a faulty optocoupler on a Mac Plus International analog board. Part is labeled H11AV.
What's the best replacement ? An 4N35 optocoupler or VOR1121A6 solid state relay or something else ?
4N35: https://www.mouser.be/ProductDetail/Vishay-Semiconductors/4N35
VOR1121A6: https://www.mouser.be/ProductDetail/Vishay/VOR1121A6/
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Posted by: bibilit on 2017-12-03 12:25:02
CNY 17 (CNY 75 GB) is working fine, replaced quite a few without issue.
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Posted by: nvdeynde on 2017-12-04 06:41:33
The specs of an CNY75GB and the 4N35 suggested in Macintosh repair and upgrade secrets are quite different.
While the CNY75GB has a CTF of 200%, the 4N35 is only 50%.
I suppose they are not exchangeable.
So which is the right part ?
The CNY75GB is compatible for the Classic I/II boards but I doubt it is for the Mac 128/512/Plus.
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