Show posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Show posts Menu

Messages - Orson Maxwell

The Newcomer's Forum / Re: Marshall 1986 Bass - SS Copy
February 04, 2014, 02:42:52 PM

We have a guy in our community who did a FET copy of JCM800. You can listen/compare here: link to samples on his website.
If it is close enough for you then the answer is yes, you can.
If you and the rest of the guys are interested, I could give some more detail - most of the works are in Russian at the moment.

As for the second part, I would suggest starting from the beginning and reading something like the Art of Electronics (studying it myself)

Anyway, I'm in the same boat as you are at the moment, though I had some substantial vacuum tube design practice.

Cheers and welcome.

Fender princeton reverb? (if you need a tube one)
Tubes and Hybrids / Re: Help with Vintage '68 Champ Amp
January 30, 2014, 03:55:37 AM
We have a set of standard regulations regarding electrical wiring in living areas here in Russia that are obligatory for following. If you mess with these and someone gets hurt because of this - you go to jail, so it is serious stuff
Naturally they changed over time, and any old equipment is always a pain in the side, therefore I totally agree with phatt - its better to consult with a certified electrician.
Tubes and Hybrids / Re: Help with Vintage '68 Champ Amp
January 28, 2014, 01:13:17 PM

This potential can indeed be leaking via the transformer's parasitic capacitance, and unfortunately I don't remember what trannys they used back then.

Where did you connect the third (ground) wire of the new cable in the amp? Is the 220/110 step down transformer grounded?
Software / Re: wav2pwl for OrCAD simulation
January 27, 2014, 05:16:41 PM
Fixed some bugs and added the complimentary utility to convert the simulation results (.csd) back into audio:

Link to the box.

Cheers guys :)
Software / wav2pwl for OrCAD simulation
January 25, 2014, 07:54:13 AM
Hi, guys!

I thought I'll just throw in a little program I came up with when I got to reamping virtual circuits in OrCAD. I don't know if anyone here is into it, but anyway here it is:

Link to my box

It is a command line program and requires Python 2.7.X to run, but I can try and see about that if required.

Some features:
- supports wave audio up to 88.2kHz / 24b;
- Supports multichannel wavs (the channel to convert is chosen via the '-c' option);
- Works fast (a minute of maximum supported resolution audio gets converted in 45 seconds. You can benefit further using lighter wav format and quicker HDD);
- Does not lock up and shows progress;
- Can be interrupted via standard Ctrl+C combination at any time - even when writing data to file - all offloaded data gets saved;
- Shows help if run without arguments.