Radio Road

RE: Here's a pic of what's in the optocoupler

67.102.77.199

In Reply to: RE: Here's the "after" pic with the eBay optocouplers in place... posted by crooner on May 05, 2008 at 17:51:32

I tore into one of mine because it wasn't working. Two major problems found: 1. The NE2 lamp was weak and didn't fire off reliably. 2. The leads on the CdS cells were pulled loose internally and made intermittent contact with the cell electrodes. I suspect the latter was caused by how the assy was potted into the can. Too, these are pretty cheap CdS cells...I would have expected Marantz of the time to use the hermetically sealed type.

Although I was able to find suitable cells at RS, I would think a better solution to the 10B optocoupler issue would be a non-opto circuit using an IC type analog switch.

Follow Ups:

thanks for posting! - crooner 16:39:51 05/09/08 (0)
RE: Here's a pic of what's in the optocoupler - Marantzguy 11:03:38 05/09/08 (1)
- Interesting post as usual Rich! - crooner 16:44:33 05/09/08 (0)

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