Looking for an AX84 Project Kit?
Don't miss out! HERE

[Home] •
Account Info
Greetings, Guest.

• Login
• Reset Password
• Create New Account

Browser cookies are required for these functions.
Navigation
• Home
• HI-VOLTAGE WARNING
• DIY Amp Kits, Parts, Etc.
• Projects Overview
  • Classic Amp Projects
  • Enclosure Projects
  • Effects Projects
  • Associate Projects
  • Building Blocks
  • Archived Projects
• FAQs
• Discussion Forum
  • Interesting Threads
• Articles
• Tube Bias Calculator
• Links
• News
• Contact Us
Welcome

Welcome to AX84® the base camp for tube (valve) electronics hobbyists.

AX84 exists to provide:

1) A great environment to learn about music-related electronics in general. AX84 is a place where those with experience are interested in helping diligent beginners who are willing to do their homework.

2) A place where those with more experience can field their ideas to peers and get useful feedback.

3) An environment that respects the past, but is not enslaved by it. INNOVATION IS GOOD (and it didn't die in the 1950s.) There are new things under the sun every day. Move the ball forward!

Our HUGE discussion area is under 'Discussion Forum' to your left.

We are hard at work improving the site- check back often!

Recent Forum Threads
"Champ Build - Upgrades?"
Posted By swinginguitar on 06/19/2013
So yesterday I realized that I have enough parts in stock to build a BF Champ (non-Vibro). A few questions:

1) The OT I have is a 125ESE. The datasheet I have wasn't clear as to what the primary im...

Discuss this entry
"New schematic - Bogen Conversion"
Posted By kenbonner89 on 06/19/2013
Completely gutted an old Bogen CHA-33 PA.
Going for a cleaner, loud guitar amp.
Any thoughts? Places I should tweak?

[link]

Some things...

Discuss this entry
"mute switch for output transformer with headphones wiring"
Posted By lukasz on 06/18/2013
Hello,

I got output transformer with headphones wiring for my first P1 (its from some old TV). I'd like to put mute switch to play only through headphones, so it would have to be between output wir...

Discuss this entry
"Unique situation: Lowrey organ tube amp help needed."
Posted By GreenCanoe on 06/18/2013
An electrical engineer I work with has a side gig as a Yamaha keyboard authorized service tech. He has a church a fair drive from here that uses a Yamaha keyboard that is plugged into a vintage tube ...

Discuss this entry
"Creative Inductor Ideas"
Posted By musicisphysics on 06/16/2013
I need some creative ideas on how to use inductors in a tube amp.

I recently acquired about 3000 Hamlin coils which were intended to be used in 50vdc reed relays.

[link]

Discuss this entry
Like us and Find us

Subscribe to me on YouTube

Site News

2012-2-25: Winter is almost over. What's on your workbench?

2011-10-10: Some good discussions about LTSpice in the forums again, as well as suggestions on what all to do to a P1-eXtreme.

2011-10-10: What all can you do with a P1-extreme? check the forum

2011-10-7: Don't forget to like us on Facebook!

2011-08-11: Posted some Single-Ended Lead clips in the Classic Amp Projects->SEL section. Hundreds built but now we've got clips. Check out the archived projects section for more clips.

2010-10-22: Be sure to check out our discussion forum using the link on the left..

2009-07-01: The Treasure Fleet is on the way to Rio De La Hacha with a fortune in gold!

2009-04-32:
We're looking for media clips of recent builds... please stop by the forum and respond to the thread.

2008-10-4: Archived Projects section is functional again.

2008-9-18: RSS Feeds for the forum have been up for a while, but not advertised...
* Active Threads
* New Threads
* Recent Posts

2008-6-26: Want to participate in our discussion forums? You are welcome to read and lurk as you like. If you think you'd like to post with regularity, please sign up for an account.

AX84® is a registered trademark of Doberman Music Products, LLC. AX84.COM content may not be reproduced without the express written consent of Doberman Music Products, LLC (sales@dobermanamps.com).
For information about using the AX84® trademark, project names and designs, click here