Beginners Project: Need a schematics for a small simple EL84 SE (or PSE) amp

Erik Johansson · 29th April 2002, 09:13 PM

I´ve decided to build a simple EL84 amp as my first tube project. This first project will be more about learning than to build an extremely good amp.

For instance, I found a cheap universal OPT at a great price (About US $25 each): http://www.demostenes.no/endr1be.asp?Kode=3956

I´d really like to use either those trannies, or a couple of Hammond universal OPTs from the 125x line, maybe the 125B would be suitable for an EL84 SE amp and the 125C for a PSE amp with two EL84 per channel?

The Hammond OPTs mentiones cost about the same as the first one I linked to, which is made by an italian company called Novarria.

What I´m looking for right now is a suitable schematics. I´ve read the thread about SE EL84 amps and really like this one:

Please give me some advise. I´ve done some calculating and it looks like it would cost around US $100 to build the amp in the picture.

/Erik

Erik Johansson · 29th April 2002, 10:30 PM

Here are 3 interesting circuits I found at tubebuilder.com

/Erik

Thatch_Ear · 15th May 2002, 11:35 AM

The one with the EF86 looks like it might be the Mullard 3.3 circuit, which I have listened to mono blocks. The set of 4 transformers was $400, hand wound in England. Review in <www.audioreview.com>

29th April 2002, 09:13 PM	#1
Erik Johansson diyAudio Member Join Date: Mar 2002 Location: Gothenburg, Sweden	Beginners Project: Need a schematics for a small simple EL84 SE (or PSE) amp I´ve decided to build a simple EL84 amp as my first tube project. This first project will be more about learning than to build an extremely good amp. For instance, I found a cheap universal OPT at a great price (About US $25 each): http://www.demostenes.no/endr1be.asp?Kode=3956 I´d really like to use either those trannies, or a couple of Hammond universal OPTs from the 125x line, maybe the 125B would be suitable for an EL84 SE amp and the 125C for a PSE amp with two EL84 per channel? The Hammond OPTs mentiones cost about the same as the first one I linked to, which is made by an italian company called Novarria. What I´m looking for right now is a suitable schematics. I´ve read the thread about SE EL84 amps and really like this one: Please give me some advise. I´ve done some calculating and it looks like it would cost around US $100 to build the amp in the picture. /Erik

15th May 2002, 11:35 AM	#3
Thatch_Ear diyAudio Member Join Date: Nov 2001 Location: Dallas,Tx	The one with the EF86 looks like it might be the Mullard 3.3 circuit, which I have listened to mono blocks. The set of 4 transformers was $400, hand wound in England. Review in <www.audioreview.com> __________________ Thatch

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29th April 2002, 10:30 PM	#2
Erik Johansson diyAudio Member Join Date: Mar 2002 Location: Gothenburg, Sweden	Here are 3 interesting circuits I found at tubebuilder.com /Erik