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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

"Alternative to Hammond 1650N"
Posted By Manumetal on 05/24/2013

Hello,

I'm very newbie in tube amp bulding, but I want to change the output transformer of the "Stand alone 50w power amp" with an Operatonal amplifier like LM3886TF in voltage follower mode...

Discuss this entry

"designing small amp"
Posted By Pete H on 05/23/2013

Hey guys. I've had fun with my HO and SEL, but I figure it's time to leave the comfort of the nest and have some fun trying to design a basic amp. Hopefully I'll learn something, at least! I thought I...

Discuss this entry

" Question on paralleling more power tubes"
Posted By Pinball Wizard on 05/23/2013

Hello all,

I saw a bit of good projects here on ax 84 and i think i will build a P1.
now i would like to ask a pair of questions:

1 ) i have a PT with output 200 230 and 0 how i can match at t...

Discuss this entry

"comanchero question"
Posted By Seth Leigh on 05/23/2013

I've just started my long-delayed Comanchero project. I made the turret board, and ceremoniously soldered on the first two components, a pair of 4007 diodes that I had left over from my SEL project. ...

Discuss this entry

"Hammond PT and OTs for sale or trade"
Posted By plotch on 05/22/2013

I have one used PT and two used OTs to sell or trade.
I need a PT for a P1 extreme build, and two smaller single-ended OTs suitable for 5F1, P1, P1EX or similar.

1) Hammond 372BX single-ended PT...

Discuss this entry

Like us and Find us

Updates: Fri, May 24th, 2013 @ 12:44:13

Updates to pages about

'news'

have been completed.

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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