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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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Hiraga MC Phono Preamplifier

Finding I liked Moving Coil cartridges I tried my hand at yet another MC preamp. This one is a Jean Hiraga design and uses matched low noise bipolar transistors pairs and a +/- 6V source. The transistors Hiraga specifies are no longer available. But better replacements are the Analog Devices SSM2220 chips at $11 each (you need two). Hiraga specifies very large storage caps so I juiced this compact build with 1F (1,000,000uF). Plus I added 220uF low ESR caps and 0.22uF snubbers for better mid-range performance. Since this image I mounted an external switch to select between 220, 100 and 45 ohms of loading. A 25 turn trim pot allows adjustment of "0" volts on the input and Russian PIO caps decouple the output.

Mark – Mongrel Dog Audio

Claravox-Dogma.jpg EF86-EL84-Parafeed-Tube-Amplifier.jpg Hiraga-MC-Phono-Preamplifier.jpg SV101672.JPG IMG_3498.jpg
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Album name:Solid State Audio Projects
Filesize:389 KiB
Date added:Feb 04, 2012
Dimensions:1448 x 892 pixels
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