@leonard-peters I’ve been enjoying the project so far! I’m currently breadboarding each section and analyzing it as I really want to understand how the circuit works!
Hi, just an aside — if you plan on noodling a lot with audio stuff, the TL07x’s are used by the ton. Not a bad idea to have a lot on hand. They’re cheap in the US and Europe and even the Chinese vendors don’t seem to cheat on them often.
(Although, and this should be a different thread 🙂 – they have been known to make fakes of even sub USD 0.50 chips. I recently bought mix of a few hundred TL074CN + ~CP, and TL084’s from over yonder. Random tested maybe a dozen of each and they were all fine.) YMMV
ciao
-HP
@howardp My advice, do NOT! attempt to buy from the Chinese market or unknown vendor on E-Bay. I have been burned too many times with TL074, 072, 071, 084 082 and not only. Even though they somewhat work, they are clearly fakes since there is a huge difference on the oscilloscope by compression with a genuine part, most of the time the wave form is deformed/distorted and the amplification factor is also different There are quite a few people on YouTube that discovered this and present it as a warning I would stay well away from that “junk”
Hiya @ovi4
Thanks for the warning – yes, I am aware of the problem.
In the case of these particular chips I wasn’t too concerned because I had planned to fry a few anyway … the were all for testing the limits of their innards. 😯 When it’s a serious, keeper project, I get the stuff mainly from the usual sources: Mouser, Digikey, TI, sometimes Jameco or Newark. If I want to be certain the device will meet or exceed specs, I get it from TI.
Any other recommendations you might want to mention for reliable sources would be most welcome.
I buy a fair amount of stuff from eBay, but I’m careful. Only been burned once (knock on silicon). The other thing to never buy from eBay is software = if it’s pirated, it’s near impossible to prove it to the eBay Overseers. (That was the burn .:/ )
– HP