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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
"Another Tube Reverb Question "
Posted By Alva Goldbook on 05/21/2015
Well, not so much a question, as I'd like the opinion of the board.

So I'm working on a reverb circuit. I'd like to get the kind of reverb that's as rich as found on blackface amps. These circuits...

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"Modded my Simple Preamp with additional gain stage -too much bas"
Posted By Darren Porter on 05/21/2015
So, when I built my Simple20, I did it with an eye towards expansion by adding two additional 9-pin sockets and running the heater wires to them. So far, I have used one of the sockets for a one-tube ...

Discuss this entry
"Tube FX loop on HO"
Posted By sajyho on 05/20/2015
Hi guys, It's been a while since I added Mark L's FX loop to my HO: [link]
It sounds amazing with my Rebote delay, but when I use it with my FV-1 based...

Discuss this entry
"Tube Reverb and Phase. "
Posted By Alva Goldbook on 05/20/2015
I'm working on an amp with a classic Blackface style reverb circuit, and I'm trying to figure out where to place the reverb return back into the preamp circuit without having phasing issues.

The r...

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Posted By RickTown on 05/19/2015
Well, spider monkeys and parts bins don't mix. We have self-closing hinges on most of the doors in the house including my shop door but the spring in one of the two self-closers broke a while back whi...

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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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