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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
"noise isolation, guitar or amp"
Posted By Seth Leigh on 05/21/2013
I've noticed that in my mancave, with all my computers and whatnot, my amp and guitar combo is very, very noisy. At my parents' house, it's very quiet and I can really crank the volume much higher th...

Discuss this entry
"Resistor values for power supply"
Posted By Pete H on 05/21/2013
I've built the HO and SEL, and have thoroughly enjoyed tinkering with them. I definitely have made some mistakes along the way, but have learned a ton. I do have a question about the power supply and ...

Discuss this entry
"My new builds have low output, Help!"
Posted By sixstringer on 05/21/2013
Greetings, I have just completed 2 more of Dave Hunter's Two Stroke" amp design. I've built 3 of these previously, they all work great. These two new ones have about 20% of the volume of the others...

Discuss this entry
"6sn7 power section picture"
Posted By sdp1234 on 05/21/2013
Does anyone have a picture or two showing how they connected the 5.6k resistors to the 6an7s on a studio october or 440? Im doing my own layout and im out of room. Didnt want the restors flying but...

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"lead 2 tone stack"
Posted By sleigher on 05/20/2013
Has anyone else worked with the lead 2 and found the tone stack to be extremely bassy? I swapped the tone stack out for the jalapeno option and it dramatically reduced the bass so much that is light ...

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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.


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