Pricklely Peete
Franken modder
- Joined
- Feb 17, 2008
- Posts
- 4,188
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I have this old NAD preamp that has a pretty decent MM/MC RIAA phono preamp in it that I want to put back into service for the casual listening/computer head fi setup but it's in need of a few updates (PSU rebuild and recap, some wiring/jack upgrades, resistors, diodes, IC OPA's).
The Preamp itself in stock trim is somewhat grainy and veiled in nature, certainly not what I would consider good enough for what it cost me back in '89 (900.00 CAD) but with a few parts upgrades in key spots it could shine once again. I have the matching 150W per channel amp that has been partially rebuilt and is currently being used for the den's 2 channel speaker/DVD HT system so that side of the equation is taken care of already.
The main problem I've run into with the Preamp thus far is finding a suitable modern and better performing IC OPA for the stock (and very poor performing ) JRC/NMJ 2043DD dual channel, bi-polar, DIP8 package opamps.
Does anyone know offhand what a good (or great) replacement for these would be ? The NAD Pre uses quite a few of these IC's throughout the circuit (9 of them) so changing these out to something better (if possible) is paramount to taking this project where it needs to go. I searched around for a suitable reference WRT compatible modern equivalents but came up empty in that search.
Any help with this would be greatly appreciated !!!
Thanks in advance for any suggestions, links etc...
Peete.
The Preamp itself in stock trim is somewhat grainy and veiled in nature, certainly not what I would consider good enough for what it cost me back in '89 (900.00 CAD) but with a few parts upgrades in key spots it could shine once again. I have the matching 150W per channel amp that has been partially rebuilt and is currently being used for the den's 2 channel speaker/DVD HT system so that side of the equation is taken care of already.
The main problem I've run into with the Preamp thus far is finding a suitable modern and better performing IC OPA for the stock (and very poor performing ) JRC/NMJ 2043DD dual channel, bi-polar, DIP8 package opamps.
Does anyone know offhand what a good (or great) replacement for these would be ? The NAD Pre uses quite a few of these IC's throughout the circuit (9 of them) so changing these out to something better (if possible) is paramount to taking this project where it needs to go. I searched around for a suitable reference WRT compatible modern equivalents but came up empty in that search.
Any help with this would be greatly appreciated !!!
Thanks in advance for any suggestions, links etc...
Peete.