Anybody in need of some Tesla MAA723 = µA723?
2x 50 pieces of them are available here (NAWTS):
https://www.ebay.com/itm/133871141980
https://www.ebay.com/itm/133871142254
![](https://i.ebayimg.com/images/g/w0kAAOSwuexhOHlm/s-l1600.jpg)
Ooof, proper bargain in prospect there. I'd have one of the lots myself if it doesn't go past €20+ shipping...
I'm pretty sure, they will exceed the 20 EUR mark significantly.
On the topic of vintage IC's and their clones, I'm currently looking for MN3007 bucket brigade delay lines, as I'm pondering a quality time project with middle boy, The Chorus Pedal. (a chorus is, just to recapitulate, a guitar stomp box in which an analog delay line has its time LFO modulated creating a fatter sound)
So far, I've concluded that Philips invented the thing (back when Philips
actually did things), Panasonic licensed them, and made the MN30xx series of delay lines.
Then, Roland bought the ICs, and made the chorus circuit in the Jazz Chorus amplifier, Dimension D chorus, CE-2 and Dimension C stomp boxes,
et al.
Around 1999 Panasonic stopped making the MN30xx. Now, the clones attack. So far, I've found several brands, Behringer with their IC brand Coolaudio, Visual Sound and Shangai Beilling Co LTD. Of course, since this is a sought-after chip, the market is full of "NOS" Panasonic-looking clones. From China. Yeah, right. That'll be authentic.
Anyway, if one accepts that it's going to be a clone build, it seems that one could get a quite nice couple evenings out of it, also doing things like drilling round holes at the right spot in Hammond boxes, et c. BOM is en route to be a shopping list, and I'm looking at my component stash for what I've got already.