Verivorax, Thanks for your TW-1 photos -> great, pls do not hesitate to put photos about your other TW-1 as well! Also thanks for DC-2, I am (or would be ) happy with it, this is one of my missing milestone of my collection ! And finally also thanks for your additional photos about your OD-1 regaring to Raytheon 3404 IC!
Bob, This is the best thread here what I have ever seen!
My friend Justin, was kind enough to take some pics of his Ibanez AD9. Look at the 8347 date code (1983 week 47) on the NE570N Compander IC. And the 5 legged Dual matched transistor.
DM-2 Serial 221400 (mid 1982) Rev A board. No diode mod.
The bridging resistor appears to be because R48 was replaced at some point with a 16k resistor for some reason, and the track is cut and a 2k2 is added to bring it back up to the original 18k. D4 has also been replaced (oops).