Friday, 25 February 2011

Lovepedal Purple Plexi 800

A lot of people have said this is a great "Marshall in a box" and it's a pretty simple circuit so worth a try.  I did a big axial mojo layout for this a while ago, but have re-done it here using more commonly used (and space friendly) components.

It's funny but it occurred to me when doing this how similar it is to the Krank Distortus Maximus that I did a layout for a few weeks ago.  It's so unlike Lovepedal to use someone elses designs ........ ermwait ..

Update: Here's a slightly smaller version which allows you to use standard 9 row vero and so will be preferable for most people.  This is verified.

Tuesday, 15 February 2011

ZVex Woolly Mammoth - vero

I had a request for a vero of the Mastotron, so here's the Woolly Mammoth which is virtually the same, with the Mastotron just having an additional 100K linear pot which the input is taken to before the first capacitor. 

The new input wiring with the Relax/Pull pot can be seen on my tagboard layout here:

This layout is also verified:

Geiri's demo of his build:

And Finally. In case anyone runs into problems, here are thevoltages from a working board with all the pots maxed.
Supply at 9,33V
Q1 Emitter: 0V, Base 0,58V, Collector 1,2V
Q2 Emitter: 0,88V, Base 1,2V, Collector 2,3V
Yours should be around 10% away from these.