So, basically, one of those points labled VB should be VCC+ and the other should be VCC-, right?

Rock'n'Roll,
--Andy

I've attached a schematic of the Line Out used by Marshall on their amps with XLR outputs.  How the do I apply power to this thing?  There appears to be voltage at VB, but the last time I checked you need a voltage and then half of that voltage to properly bias a opamp (I'm thinking of using two TL072's for the opamps), right?  So someone explain this to me...

Thanks!

Rock'n'Roll,
--Andy

Basically, if I'm looking for a schematic for some sort of Solid State doo-dad, these are the sites I check.

Geofex, the Guiter Effects Oriented Web Page (Just click the schematics link in the left hand column):
http://geofex.com/

Aaron's Stompbox Forums Selected Schematics:
http://www.diystompboxes.com/pedals/schematics.html

The Free Information Society Audio Schematic Archives:
http://www.freeinfosociety.com/electronics/schempage.php?cat=1

Jack Orman's AMZ Schematic Collection:
http://www.muzique.com/schem/index.html

If it's not on one of those pages, chances are it doesn't exist.

Rock'n'Roll,
--Andy

I actually just stole them from http://www.geofex.com and http://fuzzcentral.tripod.com so I'd feel kinda guilty posting them the in schematics section.

Fun Fact: The Rangemaster was used by Brian May, Marc Bolan, and Eric Clapton.

Rock'n'Roll,
--Andy

In addition to boosters that make all frequencies louder to drive the input of the amp harder, there are also boosters like the Dallas Rangemaster and Apollo/Orange Treble & Bass Boosters that will only boost certain frequencies.  The Rangemaster will only do trebles, but the Apollo and Orange boosters, like their names imply, can boost either the highs or lows depending on where you set the tone knob on the actual booster.  I believe that the Rangemaster could be built on the LPB1 board.

Rangemaster:


Apollo:


Orange:


(I hope those schematics aren't too big.)

I hope that helps!

Rock'n'Roll,
--Andy

I take back what I said before - my dad will let me pay for this via his paypal.

Rock'n'Roll,
--Andy

Could I get a LM3886 kit?  I don't have a paypal account set up, so is there any other way I could pay you for shipping?

Rock'n'Roll,
--Andy

Yes, my intent was to use a dual ganged pot.

Rock'n'Roll,
--Andy

Ok - I understand "mixed mode" now.  I'm probably just going to go with a voltage drive circuit.  I drew up a schematic for my concept last night (just the signal path, no power supply, yet).  Is this the propper way to 142 watts out of the power amp?

Click Here For Schematic
http://s19.photobucket.com/albums/b189/gotchaguys2/?action-view&current=EntireAmp.jpg
Be warned - the picture is about 1500x573 pixels!  It took alot of room to draw in two completely identical channels.

Comments, corrections, and other observations are greatly appreciated!

Rock'n'Roll,
--Andy

Noobie question - What exactly is meant by "mixed mode"?

Thanks for those schematics!

Rock'n'Roll,
--Andy

joecool85: You can get The Big Bang EP by sending me an e-mail so I can give you my address and then you can send me $6.00 (plus shipping) and I'll send one to you.

So if I ran two LM3886 in parallel I could be pushing 142watts without clipping in the power amp, right?

Rock'n'Roll,
--Andy

Does anyone have a schematic for a LM3886 or LM1875 based power amp?  About what is the maximum output of each chipamp?  Also, how easy is it to make these chip amps distort/clip?

By the way - I finally got a schematic for the version that I have:
http://www.freewebs.com/andrewrovner/Rage%20III%20schematic.pdf

Rock'n'Roll,
--Andy

Yeah - I wan't to try and build a completely new amp.  So what would be an easy way to get around 100watts of power that wou'ld still sound similar to this original Peavey?  I'm assuming that using a chipamp or two would work.

Rock'n'Roll,
--Andy

Hey Guys!  This is my second post here (my first was about 30 seconds ago).  I own a Peavey Rage 158 and I absolutely love it.  It sounds perfect for the kind of music I play, but it's just not loud enough!  So I figured that I would try to build a Rage 158 but with a more powerful power amp.  Then I said to myself, "If I'm going to build in more power, why not build in an entire second channel?"  So now I'm thinking, two complete Rage 158 preamps (each with a clean volume control, distorted pre-gain, distorted post gain, a switch to choose between clean and distorted on each channel, each with it's own TMB tonestack, and a switch to choose between a vintage or modern countour) running into a much more powerful power amp.  The power amp must retain the original sound, just louder!  So, should I just copy the output stage of the Rage 158 and run two or three or four of those in parallel?  Also, what power supply mods will i have to make?

Here's a link to the schematic (without modern/vintage switch):
http://www.freewebs.com/andrewrovner/Peavey%20Rage%20158.pdf

Thanks in Advance!

Rock'n'Roll,
--Andy

The Buzzcocks are great.

Since we're on the topic of punk rock, Greg Ginn of Black Flag was notorious for using solid state amps.  I quote from wikipedia (which probably quoted some other source):

QuoteHe [Greg] has said that this Sound City amp was horrible and was the last time he used a tube amp. He has said that he dislikes tube amps because they round off the sound and he wants a sharper tone.

He used a Roland until 1985 when he began using a Yamaha preamp. He used a Peavey P.A. head for a while too.

Rock'n'Roll,
--Andy