I don't know where you're looking but eBay seems to be awash with them. However, I've expressed my doubts about them before...Good luck finding the chips. I’ve had an ebay search for them active for a decade.
They are readily available on eBay from multiple Chinese sellers.Good luck finding the chips. I’ve had an ebay search for them active for a decade.
Highly unlikely that anyone would counterfeit them!
Nope - highly likely! All you need is a pile of random chips and a printer. It is a massive industry.
Very highly unlikely, check the sellers feedback! While it would be easy to pass off something like 741 op amps as something much higher grade, (as most people would not be able to check). You can't fake these chips, fakes would just not work!
If they don't work you can get your money back!
Exactly, they don't!!
You tied them?
No, I'm not that gullible.
Frankly it's that which also fuels my suspicions. For years these chips were almost unobtainable and when they did show up they were pricey. But all of a sudden, decades after they ceased production, they have all magically appeared again in China and for next to nothing.
Yes but there could've been stocks of parts in the orient as that's where most of the equipment was manufactured. As for price, if there is a stock pile that no one needs nor wants the price of the parts will reflect that! I used to purchase from domestic distributers that would've got parts directly from Motorola, so as soon as they were no longer manufactured there was no more supply.
Yes for the decoder/encoder I would suggest using the Fosgate circuit. It's six pole and all the parts are readily available, but I would recommend using a better op amp than the TL084. On the other hand the MC1312P and the after market ECG/NTE type replacements are also readily available.
I don't think much consumer electronics was produced in China in the 1970's.
