Zen V9 J-fet poweramp finished. - diyAudio
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Old 8th April 2006, 08:00 PM   #1
steenoe is offline steenoe  Denmark
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Default Zen V9 J-fet poweramp finished.

I finished the Zen V9 yesterday. Initial listening sessions, sounds really promising. I think this is the best sounding Zen amp, I have heard yet I used the PDDA boards, thanks for sharing the layout Peter Daniel and Veteran. Everything went smooth, both channels worked right away. I will note also that the grounding scheme on that layout is just right. There isnt any trace of hum or any other nasty things. Here is a picture of the internals, while adjusting the first channel. The trafos are 2 pcs of 300VA 2x18 volts followed by 2 DIY rectifierboards using 30A Stealth diodes, snuppered with small Rifa's. Smoothing caps are 4x 15.000uF Rifa's. The amplifierboards are like Veterans schematic. I wanted the amp to have the F-amp look, hence the horisontal fins. I am very pleased with the sound of this amp. The top-end is really smooth, detailed and "airy", better than I have heard before from a Zenamp. Thanks Nelson, for giving us this fine circuit

Steen
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Old 8th April 2006, 08:01 PM   #2
steenoe is offline steenoe  Denmark
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Closeup of the board:
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Old 8th April 2006, 08:02 PM   #3
steenoe is offline steenoe  Denmark
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The finished chassis:
The alu surfaces are etched by a NAOH solution.
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Old 8th April 2006, 08:05 PM   #4
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Congratulations! That is one great looking build...
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Old 8th April 2006, 08:07 PM   #5
steenoe is offline steenoe  Denmark
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Last one, from the rearend:

BTW, amazing that such a simple circuit sounds so good

Steen
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Old 8th April 2006, 08:20 PM   #6
steenoe is offline steenoe  Denmark
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Quote:
Congratulations!
Thanks Bas I am looking forward to hear some of you guys oppinion about this amp, too. I was pretty surprised to realise how good it sounds, even though I expected it to be good, from NP's writings
Here is a closeup of the way the J-fets are mounted with the legs extended with solid 1mm copper wire.

Steen
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Old 8th April 2006, 08:23 PM   #7
gl is offline gl  United States
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Hi Steen,

A beautiful amplifier. Very professional looking indeed. The brass feet are nice touch too!

Cheers,
Graeme
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Old 8th April 2006, 08:49 PM   #8
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Really neat Steen, that case shines as good as a First Watt.

An best of all it sounds as it should, best of Zens?

There seem to be other contenders for the title though, Carpenter’s ZV7T. Maybe John will make a ZV9 and report his findings.

Congratulations!!!!
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Old 8th April 2006, 08:49 PM   #9
Zen Mod is offline Zen Mod  Serbia
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Old 8th April 2006, 09:25 PM   #10
moe29 is offline moe29  United States
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it's so nice to see an amp completely finished

looks great
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