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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
"V V R Pease"
Posted By Audiosalvage on 07/25/2016
Hello, I've heard all the praise for the vvr3 by dana hall and would love to try one in my 2204 clone with fixed bias. But it seems like a big secret and they don't sell them anywhere. So does any b...

Discuss this entry
"simple pre amp"
Posted By mac dilard on 07/25/2016
For anyone that is making corrections: For the chassis layout of the simple pre amp....Pin 2 of the preamp tube should be connected to pin two of the Gain 1 pot. ...

Discuss this entry
"Mark L's FX Loop"
Posted By exabrial on 07/25/2016
Hey Guys,

It looks like at one point a user named Mark L posted an awesome fx loop. The file was hosted here: [link] but is no longer avai...

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"Low Volume p1ex"
Posted By eshelton2308 on 07/25/2016
Hi all,

This is my first post, though I've been digging around these forums for quite some time.

I built my first amp recently, a p1ex. It's straight from the plan with the exception of the a...

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"6l6 gone wrong"
Posted By Anthony B on 07/24/2016
Anyone seen this happen? If its idleing it behaves normally, if you start smashing out power chords at full volume for a few min, it starts drawing 150ma current and the whole bulb is glowing blue. ...

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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...
* 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.

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