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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
"My latest amp project"
Posted By Paul Fawcett on 04/17/2015
Hey all, just wanted to share a quick picture of my latest amp project:


A ...

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"Clean Preamp, any audio demo?"
Posted By ImNotThrasher on 04/17/2015
Hi, im looking for a clean amp, for months this "Clean Preamp" was catching me, some friends says that I need to build a Fndr Twin, I like this too, but the AX84 just looks more "original" and versati...

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"1x12 Cab Batten Screw Locations"
Posted By cpsmusic on 04/17/2015
Hi Guys,

Finally got some time to put together the 1x12 cab.

I notice on the diagram that the location of the screws that hold the long battens are different - one screw is inset 2 inches while ...

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"Selectable bypass caps in class A power section?"
Posted By Alva Goldbook on 04/16/2015
If I'm remembering this correctly, if you have a power section that is cathode biased, and you use a lower value bypass cap (say 47uf) then won't you get kind of a natural compression? But if you rais...

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"leslie cab"
Posted By bullpeters on 04/16/2015
i finally built a leslie! Its not quite what they attach to organs but is a box with a spinning leslie foam thing and a two speed motor. At present its got a celestion 12" just sitting on top, but...

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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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* New Threads
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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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