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Old 25th June 2012, 10:49 AM   #2031
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Quote:
Originally Posted by quanghao View Post
yes! but change some value for low current, and change bias to biger

150R to 220R
Post correctly but need other resistance value R20 (Mimesis clone ) for optimum value Vgs .
Also the resistance value and R22 are very crucial to get in equilibrium in volts over the resistors R1 and R2 when well heated specific materials.
For me R22 13,5 KΩ.

Last edited by nikosokey; 25th June 2012 at 11:05 AM.
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Old 25th June 2012, 10:52 AM   #2032
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Quote:
Originally Posted by nikosokey View Post
Post correctly but need other resistance value R20 (Mimesis clone ) for optimum value Vgs .
biass, 390 or 410 for K1058- J 162, if 150R change to 220R

and 410 to 510 for 10N-10P

please se the image for measure
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Last edited by quanghao; 25th June 2012 at 10:57 AM.
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Old 25th June 2012, 11:09 AM   #2033
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Quote:
Originally Posted by quanghao View Post
biass, 390 or 410 for K1058- J 162, if 150R change to 220R

and 410 to 510 for 10N-10P

please se the image for measure
I've done and fits perfectly with your measurements
Also R21 7,5 KΩ and R13 270 Ω (Mimesis clone )
Regards Nikos

Last edited by nikosokey; 25th June 2012 at 11:23 AM.
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Old 25th June 2012, 11:24 AM   #2034
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Quote:
Originally Posted by nikosokey View Post
I've done and fits perfectly with your measurements
Also R21 7,5 KΩ and R13 270 Ω
Regards Nikos
yes!

7.5K and 270 for NFB, exactly. change to it!
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Old 25th June 2012, 11:34 AM   #2035
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Quote:
Originally Posted by quanghao View Post
yes!

7.5K and 270 for NFB, exactly. change to it!
More bandwidth perfect square wave at 100khz
I thing on Mimesis 9 with 50/50AC = 70V+/- Yes the correct values are
7.5K and 270 for NFB.
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Old 25th June 2012, 12:07 PM   #2036
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Quote:
Originally Posted by nikosokey View Post
More bandwidth perfect square wave at 100khz
I thing on Mimesis 9 with 50/50AC = 70V+/- Yes the correct values are
7.5K and 270 for NFB.
yes! +-70v for K1058 -J162
+-80V for 10N-10P

use 7.5K and 270 R for NFB.

it is OK
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Old 26th June 2012, 09:50 AM   #2037
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you can complete this amplifier in this topic!
Thank you

637 Amplifiers
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Old 26th June 2012, 08:57 PM   #2038
limono is offline limono  United States
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OT but is there anybody (except banned naggysaudio) with direct experience with Goldmund Mimesis 10 DAC?
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Old 6th July 2012, 08:43 PM   #2039
alex mm is offline alex mm  Romania
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Default Second Goldmund amp finished...

......today, have done the last connection , in my second built Goldmund amplifier, using better quality parts I mean 500VA " R "core transformer , 47.000uF/80V Kendeil elyt caps./rail , step by step relay and , so on ....
Hardest part, as usual was the case , made from scrach .Tomorow I will start up , becouse I want to sleep well , not to think all night .......more information soon. One picture , lazy to upload more pic.

regards Alex.
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Old 7th July 2012, 03:40 AM   #2040
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Very nice work Mr. Alex MM...very good...
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