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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
"#47 power tube from 1930s radio"
Posted By DAVE MORIN on 01/21/2017
I have picked up an old Radio. I really want to use the PT, #80 recto and #47 power tube in a guitar amp. The power tube has a directly heated cathode( I think ). I'm not understanding how to bias thi...

Discuss this entry
"Heater wiring"
Posted By James Kirkland on 01/19/2017
I have tried to read quite a bit on this, and I realize it is an old topic. I am just starting on the heater wiring for a basic P1 build, and want to understand it as well as possible. There are a f...

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"Looking for a Lite IIb board. "
Posted By C Dracmadavitch on 01/19/2017
Hi all. I'm looking to purchase a Lite IIb board to convert my Epi Valve Jr. head from a 5-watt to an 18-watt. I tried to order one from guitaramplifierpcbs.com, but I read that the main guy, Terry,...

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"P1 as a bass amp?"
Posted By James Kirkland on 01/19/2017
I am almost finished my P1, and if it doesn't blow up when i plug it in, I was thinking of using it with a bass that I just picked up. If connected to an appropriate speaker, how would it perform? C...

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"LQQking for the Ultimate Cab"
Posted By Dire Wolf on 01/18/2017
I am planning a cabinet build and I am trying explore some of my options. I see there many different sized designs used by a variety of manufactures. I have gone over the cab design here which seems s...

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Updates: Sat, Jan 21st, 2017 @ 23:04:46
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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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