SillyOctpuss
Well-known member
Ah gotcha
Any current sources for LM308 out there?
- Thread starter cooder
- Start date
Ah gotcha
SillyOctpuss
Well-known member
MichaelW
Well-known member
This damn thread just made me buy a bunch of stuff from 1947transistor2012 ....sigh.....
Got me too
drgonzo1969
Well-known member
I bought a motorola LM308H from them. Thanks for posting the link here. I didnt look at the rest of their inventory but i dont really neeed anything else at the moment. I guess i dont NEED the LM308H.... but i wanted one.
Barry
Well-known member
Thanks a lot, I should have never clicked that link
Talk about a kid in a candy store...
drgonzo1969
Well-known member
today is a good day for 1947transistor2012! hahaha
Bricksnbeatles
Member known well
6 left. I grabbed two (why? I don’t even like rats. I guess I’ll do some mojo builds as gifts for Xmas?) and it seems someone else grabbed two since it was down to 8 right before I ordered.Better hurry, that product is trending (can’t imagine why) and there are only 10 left after my purchase of 2……gonna see what all the fuss is ab since I just finished a Muroidea (currently with the OP07) and a Slow Loris in the works. F*cking mojo
cooder
Well-known member
Wow guys thanks for all the info and help, I wasn't expecting such a lively/fun/helpful thread to be, more like "meh' not again..."...
Great stuff! I'm planning to use it in a few "Voodoo Women (Roger Mayer Voodoo 1") in Chucks Boneyard. Also I had a friend who plays an original Voodoo 1 all the time compare the first test build with different chips and he could blind test the difference between fakes and a real one. So there's seems to be something to it in that circuit at least.
Looks though as the ebay seller might be out soon haha...
Great stuff! I'm planning to use it in a few "Voodoo Women (Roger Mayer Voodoo 1") in Chucks Boneyard. Also I had a friend who plays an original Voodoo 1 all the time compare the first test build with different chips and he could blind test the difference between fakes and a real one. So there's seems to be something to it in that circuit at least.
Looks though as the ebay seller might be out soon haha...
Chuck D. Bones
Circuit Wizard
I did not want to hear the diff between LM308 and OP07, but unfortunately I did and now I'm stuck. The good news is I have a small stash of LM108AH metal cans. I've had them so long I don't recall where, when or why I acquired them. They sound the same as LM308 DIP, unless you look at them and then they sound better. Check the date code, they're older than a lot of you guys. Believe it or not, that's the AMD logo. One of the premier advanced microprocessor manufacturers used to make military-grade opamps!
If you like to turn your Rat up to 11, then an OP07 will sound about the same. I hear the difference at low gain, on the cusp where the opamp stops clipping and the diodes take over. YMMV.
BTW, the Voodoo-1 uses an LM308, but an MC3476 sounds nearly identical in that circuit.
If you like to turn your Rat up to 11, then an OP07 will sound about the same. I hear the difference at low gain, on the cusp where the opamp stops clipping and the diodes take over. YMMV.
BTW, the Voodoo-1 uses an LM308, but an MC3476 sounds nearly identical in that circuit.
Laundryroom David
Keyboard Cowboy 🤠
Goddammit, Chuck
Well there’s tonight’s plan - I’m going to try to hear a difference.
derevaun
Well-known member
At risk of causing another stampede...
... I recently bought four from Retroamplis. They're at least single opamps (different date codes) and sound fine. They were the last ones in the third of the three different LM308 items that are listed there now, so YMMV.
If you're in New England, I found some AMD metal can LM308s at Electronics Plus, an actual brick & mortar (mostly NTE) electronics shop in Littleton MA, a couple months ago. The owner said they were in the stock of a TV repair shop he bought up. I haven't tried them yet--can't bring myself to mangle the long leads in non-emergency conditions--so again YMMV. I trust the guy though, and who doesn't love an old school electronics shop. He had one set of five left.
There's also the NTE938, which, standard uncertainties apply I guess.
... I recently bought four from Retroamplis. They're at least single opamps (different date codes) and sound fine. They were the last ones in the third of the three different LM308 items that are listed there now, so YMMV.
If you're in New England, I found some AMD metal can LM308s at Electronics Plus, an actual brick & mortar (mostly NTE) electronics shop in Littleton MA, a couple months ago. The owner said they were in the stock of a TV repair shop he bought up. I haven't tried them yet--can't bring myself to mangle the long leads in non-emergency conditions--so again YMMV. I trust the guy though, and who doesn't love an old school electronics shop. He had one set of five left.
There's also the NTE938, which, standard uncertainties apply I guess.
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Laundryroom David
Keyboard Cowboy 🤠
Preliminary investigation leads me to conclude that I do not hear a difference between OP07 and lm308 at high gain. Or really at medium gain. I do hear a difference at lower gain with the filter about 75% but I’m looking for words to explain it. Stay tuned. Or maybe I’ll start a thread.
Chuck D. Bones
Circuit Wizard
The NTE938 datasheet is sparse to say the least. While they don't claim it's equivalent to anything, the specs imply that it's an LM308. Without more info, I can't say one way or the other.
I don't want to lead the witness, so I'll keep my observations to myself for the moment.
I have a pretty good idea why the MC3476 works in the Voodoo-1 and not it the Rat. It comes down to the current limiting resistor between the opamp and the diodes. It's 1K in the Rat & 10K in the Voodoo-1. The LM308 can handle the higher output current while the MC3476 cannot.
You're right, we're drifting off-topic.
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