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DIY 12B4 line stage, almost done.. check it out

240sx4u

240sx4u

Lunatic Member
Alright, with the help of Eli Duttman on Diyaudio.com and ex-audiokarma member PakProtector I have made it this far. There are a few things left before I can attempt to fire it up. In the meanwhile, Ill show some photos.

This is my first DIY build, and its not perfect. I did my best! Probabally won't work or be noisy. The power supply is in another chassis and is not quite finished.

Lemme know what you think...

12b4001.jpg


12b4005.jpg


12b4006.jpg


12b4007.jpg


BTW; I started this project over a year ago and just started working on it again over the last couple months.

Evan
 
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Hahahaha, if "Douglas OK's it"?!?! I bet that Douglas would gladly hold forth in a language that sounds almost, but not quite, like English to rant about it.

Nice work, BTW!
 
The CCS he gave me was not something he created from what I was told Squidward. He did draw it for me though.

Thanks.
 
How hot are you running the CCS? (idle voltage across it * idle current) If it's over a watt, ya might wanna slap a little heat sink on the power FET. :yes:

Nice work!
 
You're going to like this puppy. pakprotector helped me with mine many moons ago. Heck on a nice guy. If you are comming to the AKFest, he'll almost certainly be there....


Any yes. The first chip in the CCS REALLY needs a heat sink.
 
Thanks guys! This is actually for my dad.

I happen to have two little heat sinks! Hell yeah. Ill put them on tonight.

Smoke test, this evening in Oregon WI.. stay tuned LOL.

Evan
 
Looks great, Evan. I really like the layout, and your choice of materials is cool.

I'm sure it will work perfectly! :thmbsp:
 
Squidward said:
Hahahaha, if "Douglas OK's it"?!?! I bet that Douglas would gladly hold forth in a language that sounds almost, but not quite, like English to rant about it.
Click to expand...

It actually is published as part of a group build project, but I'll be darned if I can find the *&*^* thing....

He called the Pre-Amp/Line Stage Guenevere (for reasons that probably had to do with a drunken party....)

OTOH, he also has a Voight pipe or TQWT that sounds excellent....
 
Yeah, not sure of its origin all I know is where I got it and the schematic is hand drawn and scanned. cfranz, that would be great if you could locate it.

Thanks nate!
 
that looks real good honest:thmbsp::thmbsp:

all Im up to is unsoldering & resoldering junk. maybe one day Ill sink my teeth in to a build :no:
 
I've still got the old hand drawn schematic somewhere at home. I'll publish if pakprotector says it's OK... Better yet, he can if he's made some improvements (although I can't see how)...
 
12B4's certainly are cool tubes, I've used them for drivers in a citation V amp.

Have also heard Doug's preamp with them, they are pretty stout some bitches!
 
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Well, no odd glows in the north-western sky. I assume that you survived your smoke test. Did the Pre-Amp survive???

I'm pulling for you.
 
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