diyAudio - Michael Rothacher
Go Back   Home > Forums > Blogs
Home Forums Rules Articles diyAudio Store Gallery Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Old

Nelson Pass Presentation

Posted 26th October 2015 at 05:50 PM by Michael Rothacher
Updated 26th October 2015 at 05:53 PM by Michael Rothacher

Here's the link to Nelson's presentation at BAF 2015:

Pass Presentation BAF 2015

Slides are available in pdf. See the video description for the link.
Michael Rothacher's Avatar
diyAudio Member
Posted in Uncategorized
Views 338 Comments 0 Michael Rothacher is offline
Old

Video Blog#1 Posted

Posted 7th May 2014 at 11:16 PM by Michael Rothacher

Video Blog #1 is posted here:

https://www.youtube.com/watch?v=mWTy...KhQ2ow&index=2
Michael Rothacher's Avatar
diyAudio Member
Posted in Uncategorized
Views 804 Comments 1 Michael Rothacher is offline
Old

Ironamp Project Video Posted

Posted 1st November 2013 at 01:56 AM by Michael Rothacher
Updated 2nd November 2013 at 06:52 PM by Michael Rothacher

Ironamp project video posted here:

https://www.youtube.com/watch?v=FZymAeaVsAg

I hope you enjoy it.

I updated the captions if you want to try Youtube's translation option - should be funny
Michael Rothacher's Avatar
diyAudio Member
Posted in Uncategorized
Views 731 Comments 0 Michael Rothacher is offline
Old

Matching Stuff

Posted 27th November 2011 at 12:24 AM by Michael Rothacher

The topic of JFET and MOSFET matching comes up often in the forums, so I thought I'd show you the jigs I use.

First up, is my trusty old JFET IDSS matcher.

Click the image to open in full size.

There's a 9V battery inside, and the meter probes are conneted across a 10 Ohm resistor which is connected to the JFET drain. I included a polarity switch for convenience when testing P channel parts.

It's pretty easy to connect the microclips, count to five, and take a reading.

Click the image to open in full size.

And here's what I use for the big stuff. This is my MOSFET Vgs matcher.

Click the image to open in full size.

First, I install a sample part and let it warm up for about an hour. There's a thermistor hot-glued to the heat sink,...
Michael Rothacher's Avatar
diyAudio Member
Posted in Uncategorized
Views 988 Comments 0 Michael Rothacher is offline
Old

Compact PCB For All JFET Circlotron

Posted 25th January 2011 at 12:59 AM by Michael Rothacher
Updated 2nd October 2011 at 12:59 PM by Michael Rothacher

This is the artwork for the PCB in the pictures. It fits into the ExpressPCB miniboard profile so it's a little cheaper to have made.

It will be necessary to check the orientation of the bias pots (I can't remember). I wouldn't want you to blow-up your $30 JFETs.
Attached Files
File Type: zip amplifiercompact.zip (8.4 KB, 609 views)
Michael Rothacher's Avatar
diyAudio Member
Posted in Uncategorized
Views 2997 Comments 5 Michael Rothacher is offline
Old

All JFET Circlotron

Posted 22nd January 2011 at 11:29 PM by Michael Rothacher

I've been mostly out of the audio hobby for a while, but I've had a few inquiries about the SemiSouth version of the Amazing FET Circlotron as of late. So, I wanted to post the performance graphs here before I lose them.
Attached Thumbnails
Click image for larger version

Name:	thdvfrq.gif
Views:	1148
Size:	10.7 KB
ID:	311   Click image for larger version

Name:	thdvpwr.gif
Views:	1127
Size:	10.3 KB
ID:	312   Click image for larger version

Name:	IMG_0944.jpg
Views:	2018
Size:	205.2 KB
ID:	313   Click image for larger version

Name:	IMG_0948.jpg
Views:	1998
Size:	249.6 KB
ID:	314  
Attached Files
Michael Rothacher's Avatar
diyAudio Member
Posted in Uncategorized
Views 3459 Comments 0 Michael Rothacher is offline
Hide this!Advertise here!

New To Site? Need Help?

All times are GMT. The time now is 12:05 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2