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Messages - PauL

#1
Quote from: joecool85 on August 11, 2007, 12:30:04 PM
I'd like to build this tube amp using a 12U7 and a 12AL8 tube.


More info here:
http://www.sophtamps.ca/mambo/index.php?option=com_content&task=view&id=25&Itemid=37

Now, I've never built a tube amp before and I've always wanted to.  This little fella seems pretty cool but I have some questions.  What do I use for a PSU?  Could I basically just use a 12v regulated source and a 5000uF cap for filtering?

Where does the volume pot go on this thing?  Could I have a gain control on this?

I've priced out parts and I can get everything minus an enclosure and a speaker for around $50.  I'm going to do a lot more reading on tube stuff before setting out to build it, as I always research heavily before getting into a new project.

Also, what about biasing the tubes?  Hows that work?

Yes, I am a tube newb.

I think i´m going to build this amp, too  :tu:
I´m still new to this topic, too, but aren´t the screen and the control gitter of the 12AL8 swaped in this schematic? (hope the designations of the gitters are corrrcet as english is a foreign language for me^^)

---> The 12k5 has a space charged gitter, that´s why the gitters seem to be swaped :)  :o