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joys joys is offline

diyAudio Member

About Me

  • About joys
    Happy, giving, warm, I hope!
    Motala, Sweden
    True aufiophile, loves to paint and sketch, cooking computer programming.. a tech-nerd.
    Web-design and audio-design
    Real Name
    Joaquim Ottoson


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Blog - Joys' World of Retronix
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  • Last Activity: 23rd November 2009 07:15 PM
  • Join Date: 23rd November 2009

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Posted 23rd November 2009 at 07:09 PM by joys Comments 1
Posted in Uncategorized
I'll start today and let's see how long it'll take me to finish this article, about an easy to build and cheap amplifier, with ECL86 or with a few tweaks an ECL82 can be used. This is actually not my totally own design. It's taken from the 'Muller' Tube Manual, but I added a input stage with tone control 2 or 3-ways, depending on your flavour. And a loudness-control...
What you need accept the passive components are;
(double up all parts for a stereo-amp.)
One EF86 - high-mu signal-pentode, for the tone-ctrl and gain-stage.
One ECL82/86 driver and power pentode for our SE-AMP.
One output transformer, Z = 7k - 10k(if you want to build a stereo, make sure you use the same brand and model, the core and turn-ratio is critical, if you desire the same sound from each channel!)
One power-transformer(mains), 230 - 250V@100ma(or 160 ma for stereo) and 6V3@2-4A(4A for stereo).

I've based my design on this article, from a magazine, printed in...
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Posted 27th August 2010 at 07:55 PM by dfidler dfidler is offline
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