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Old 31st March 2004, 09:01 AM   #1
trancy is offline trancy  Slovenia
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Default at last, amp finnished

so, this is my new amp, mu cf with ecc88 for input stage with gain up to 20 and SE power stage with gain 2 in A class with mosfets. Bias is around 3 A per channel , heatsinks reach around 45 degreees C, output power is around 18 W on 4 ohms...it sounds.....OHHHHHHHHHH........i'm in love....no hum, no buzz....

thank to Federico and mr.Pass for concept
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Old 31st March 2004, 09:04 AM   #2
trancy is offline trancy  Slovenia
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another pic...
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Old 31st March 2004, 09:11 AM   #3
trancy is offline trancy  Slovenia
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unfinished, bottom and back view...
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Old 31st March 2004, 11:08 AM   #4
dhaen is offline dhaen  Europe
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Nice job
Too many transistors for my likeing
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Old 31st March 2004, 11:12 AM   #5
trancy is offline trancy  Slovenia
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only 4
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Old 31st March 2004, 11:17 AM   #6
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Beautiful job.
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Old 31st March 2004, 11:26 AM   #7
stigla is offline stigla  Norway
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Nice woodwork! And clean and thoughtful internal wiring! Have you compared it to some other amps?

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Old 31st March 2004, 12:54 PM   #8
trancy is offline trancy  Slovenia
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Quote:
Originally posted by stigla
Have you compared it to some other amps?

stigla
I compared it with pass zenV4 (I think in my amp sound is more defined, and bass is smoother), with gainclone (sound is softer) and with one tube amp(I cannot compare)....
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Old 1st April 2004, 03:08 AM   #9
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Default schematic???

Great job!!!!

DO you have a schematic, and how did you couple the tube input stage to the mosfet outputs?

DC coupled output, or cap on output?

Thanks!!!!
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Old 1st April 2004, 06:06 AM   #10
trancy is offline trancy  Slovenia
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Default Re: schematic???

Quote:
Originally posted by AudioGeek
Great job!!!!

DO you have a schematic, and how did you couple the tube input stage to the mosfet outputs?

DC coupled output, or cap on output?

Thanks!!!!
I must find a time to transfer schematic from my head to paper, but actualy, basic concept for power stage is mr. Pass Zen ver1, with some modifications (higher bias and higher input impedance), line stage is common cathode follower with ecc88, they are coupled with cap. Actualy i want to get gain from line stage, current stage should have gain 1 (now is 2, but sounds o.k.)


here is one pic more...

lp
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