A transformer is like horsepower in a car.  You can never have too much in my opinion.  The amp will only use what it needs.

Hope to have it working this weekend.  The plan is to make it a head and then buy or make a 2x12 cabinet with a couple of Celestians in it.  If I can find a cheap Marshall 4x12 that would be awesome!

Chassis is an old IBM Token Ring MAU.  Preamp is going to be the Sans Amp GT-2 from Tonepad.  Don't know how this will work as a preamp as it overdrives the op amps for distortion and I'm using a +-15v supply for the preamp.  Not sure I'll get any distortion out of it.  If I don't I'll use the Guitar Preamp from ESP Project 27.  I've got both built and ready to go.  I hope the Sans Amp works and gives me a lot of tone choices.  That's an Avel 160VA Torroidal.

I just placed an order for a couple of LM4780s.  My next project is going to be a stereo 60watter as close t0 the Marshall sound as I can get it.  I'd like for it to clean up a bit (Fenderish) on one end and dip into high gain on the other.  Don't care about a clean channel.  Got a preamp suggestion for that one?

Kirk

If you are going to power 2 of them I would just spend the extra $5 and get the 250VA torroid.

http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=122-625

This is more like it..

This is the one I'm using for my LM3875 Chip Amp Guitar Amplifier.

I'm going to give it a try as the preamp for my LM3875 chip amp.  I just ordered a 22-0-22 160VA Toroidal tranformer and I've got the power supply and amplifier board done.  All I need to do is build this preamp, test it a bit with a couple of batteries (+-9v) go from there and then see if I can keep from electrocuting myself.  I still need to find a cabinet for it though.  The plan is to build a 1x12 combo with a Celestian Vintage 30 in it.

How would you change it for +-15v?

I might try to find a cheap, used 1x12 combo of some kind to scavenge from as I need a cabinet as well.

Quote from: joecool85 on July 20, 2006, 04:36:34 PM
You could use a rack mount enclosure for $20 or so then bolt that into a wooden enclosure.

Where do you find $20 rack mount enclosures.  Most of the ones I've seen start at $50 and go up from there.

I'm building an LM3875 based guitar amplifier but am wondering what I'm going to put it in when I get done.  Ideally, I'd like to put it in some kind of aluminum enclosure and then put that into something like a Mojo 1x12 cabinet.  That option is a bit pricey though.  Any suggestions?