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So you think you want to play with tape: An Otari Story
So you think you want to play with tape: An Otari Story
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Old Today, 02:35 AM   #181
kevinkr is offline kevinkr  United States
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So you think you want to play with tape: An Otari Story
The price of the LM4562 seems to have increased since I last checked. It's now at $1.39 at 40 pieces.
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Old Today, 02:38 AM   #182
dotneck335 is offline dotneck335  United States
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Originally Posted by anatech View Post
LM4562 for 1.11 each? Did I miss something? Where? I'm going to get me some! -Chris
LM4562NA/NOPB Texas Instruments | Mouser
Note that the quantity required for that price ($1.11) is 100. But I think it's the best bargain in the history of DIY audio!!
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Old Today, 02:48 AM   #183
dotneck335 is offline dotneck335  United States
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Originally Posted by anatech View Post
Hi dotneck335, Yes, Millmax are also very good.
Gold is a soft metal that wears away very easily. The thicker coating will survive more IC changes than the flash type. If you aren't going to replace these ICs again, why are you even looking at sockets? If you are, why are you considering the flash type finish? -Chris
Good points. My inclination towards sockets is the years of troubleshooting where a socketed IC is a god-send, especially on a PC board that's ~40 years old and probably won't take TOO much soldering on. I'm thinking that at this point, the Mill-Max sockets with gold flash are good enough. I really don't plan on doing any swapping; if I WAS planning that, I would go with the thicker gold. But I think the flash will withstand a few changes, and I need the $$ for the hundreds of capacitors I'm gonna need. Now, for you working stiffs, $25 is nothing; but for us old retired farts on a small fixed income, it IS relevant.
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Old Today, 04:01 AM   #184
anatech is offline anatech  Canada
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So you think you want to play with tape: An Otari Story
I am retired, not by choice either. I'm basically up a creek, you know the one.

What I would do if I were you is just solder the darned things in except for the early stages where you may want to try another op am type for lower noise. I don't think there is any point in replacing many of the NE5532 chips (does it use those? I'm making an assumption).

I used to work on tape machines professionally where some users wanted to improve performance once the gear was out of warranty. Of course, even under warranty was okay as long as they brought the machines in to us. It was safer to wait for the warranty to expire and that is what we recommended.

-Chris
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Old Today, 05:24 AM   #185
dotneck335 is offline dotneck335  United States
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Originally Posted by anatech View Post
I don't think there is any point in replacing many of the NE5532 chips (does it use those? I'm making an assumption).
-Chris
No, the Otari I have used a HA12017 for the head preamp and NJM4559s for everything else. If it DID have NE5532s, I'd leave 'em be, as I still think that is a fine opamp. But NJM4559s are really only slightly improved 741s (which suck), and the Hitachi chip, although fairly low noise, is slow, has horrible PSRR, and an order of magnitude more distortion than an LM4562.
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