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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
"Jcm 800 2204 voltage confusion"
Posted By Audiosalvage on 07/05/2015
Hi all, I'm having a little trouble deciphering these voltage readings. Can anyone read these and tell me what's going wrong here?

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"Tube Amp Breadboard and Prototyping"
Posted By CChurchill on 07/04/2015
I have some time right now to start planning and constructing a proper, comprehensive workstation for prototyping tube amplifier and effects designs. (I'm currently waiting on having a power and outpu...

Discuss this entry
"7/2 Outage"
Posted By Chris Hurley on 07/03/2015
Sorry for the outage folks- The server had an issue after a reboot. I need to move it to different hardware one of these days.

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" Parallel Single Ended Amplifier "
Posted By T Kaye on 07/01/2015
Hi J. just read your Parallel single ended amplifier post,,,love the pictures,,,wow super nice job,,i've been thinking about building one but I don't have a schematic to go by,,I was wondering if you ...

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"Standalone based on Core 50W PP build"
Posted By Darren Porter on 07/01/2015
I've been waiting for the AES 10% off sale and now that it's here and it's summer (lots of free time) I am finally going to build this.

I'd like for this amp to serve both as my test-bed for stand-...

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Site News

2014-10-21: Be sure to check out our discussion forum using the link on the left..

2014-10-20: The Treasure Fleet is on the way to Rio De La Hacha with a fortune in gold!

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...
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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.

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