I have always been curious as to what the final improvements that Yaesu made to the 301AD that justified a new designation. Or maybe, they were just using it as a marketing ploy to increase sales? Who knows. I would love to hear from someone that was at Yaesu that designed/worked on these radios at that time.
Anyways, I am not that curious as to crawl through schematics for differences, but I did run across one.
- Addtional caps around one of the voltage regulators - perhaps for stability (reliability? noise?) were added. I posted in an album. None of my other 301's have these differences.
The ceramic looks to be 0.047 and the electrolytic looks to be 100 uF (per the schematic), I didn't want to disturb it just to read the value (on the backside). I am considering doing this mod to my other 301's it seems like it might be a good thing to do.
Maybe if others discover more differences, they can post them.
