Electone YC-20

[M-111]

So I finally found replacement divider chips. The divider chips in my organ are YM001. The equivalent part I have is a iG000020. AKA LM3211.
I’m hopeful that the divider brings my B flats back to life.
Open to input before I start desoldering!
Seems like a divider issue because I don’t have B flats below the highest octaves on most the draw bars. I do however have B flats on the two Drawbars that have fractions:-
1 3/5 and 2 2/3 ‘
I’m struggling to understand why it works in just those harmonics? Almost impatient enough to not care... input? Thanks!!

[geoelectro]

The fractional drawbars are not playing Bb tones, but fifths and thirds of Bb. If you play a key that uses Bb as it’s fifth or third, you should find those harmonics missing there too. (Hope that makes sense)

Geo