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Goldmund Wiki and build 2017
Goldmund Wiki and build 2017
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Old 5th March 2017, 01:37 AM   #1
erikovsky is offline erikovsky
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Default Goldmund Wiki and build 2017

Hi all,

It's 2017 now. I am trying to make a Goldmund wiki that collects information I got from the internet. I hope this will be a great review for new builders.

***2017/09/07***
Reference schematic available!
http://www.diyaudio.com/forums/attac...3&d=1504260890


*****Kept updating*******
2017/3/17 Google site ON AIR!
Goldmund 2017


VAS:

2n5564/NPD5564 no significant difference


Output:

10N20/10P20 from Exicon is far more better than 2SK1058/J162, more punchy bass.

**********

"The Telos basically same as Mimesis, except some points:
- LTP Iq is higher, same 4.3mA. The 6V zener of Mimesis instead by LM329 precision low noise 6.9V zener.
- VAS Iq a bit smaller, same 7.8mA for both sides. VAS devices are Zetex transistors, FZT957/FZT857 SOT 223 SMD.
- Individual driver (MJE340/MJE350, but they're KSC2690A/KSA1220A for Telos 5000) for each MOSFET output pair(Exicon ECX10N20/10P20). There are six pairs output per channel.*
Based on this info, you can transform Mimesis to Telos.
"
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File Type: jpg DSC_2657s.jpg (277.8 KB, 641 views)
File Type: jpg golmund 9.2foto.jpg (312.3 KB, 852 views)
File Type: jpg Mimesis 22 inside Can.JPG (36.7 KB, 892 views)

Last edited by erikovsky; 1st September 2017 at 11:17 AM.
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Old 5th March 2017, 01:40 AM   #2
erikovsky is offline erikovsky
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more
Attached Images
File Type: jpg DSC_2660s.jpg (340.2 KB, 913 views)
File Type: jpg FINAL PCB NAGY.JPG (926.2 KB, 817 views)
File Type: jpg golmund 9.2foto.jpg (312.3 KB, 581 views)
File Type: jpg HP.jpg (386.5 KB, 463 views)
File Type: jpg m.jpg (280.6 KB, 470 views)
File Type: jpg metis-3-goldmund-1.jpg (207.2 KB, 635 views)
File Type: jpg mimesis-3-goldmund-4.jpg (82.9 KB, 560 views)
File Type: jpg mimesis-6-goldmund-2.jpg (81.5 KB, 449 views)
File Type: jpg mimesis-6-goldmund-3.jpg (78.1 KB, 461 views)
File Type: jpg MM29 - 29-4.jpg (321.4 KB, 446 views)
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Old 5th March 2017, 01:42 AM   #3
erikovsky is offline erikovsky
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part3
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File Type: jpg Telos_1000_a_coeur_ouvert.jpg (265.5 KB, 491 views)
File Type: jpg telos-350-plus-goldmund-1.jpg (201.6 KB, 555 views)
File Type: jpg telos-400-goldmund-1c.jpg (94.8 KB, 580 views)
File Type: jpg p314655112-4.jpg (222.2 KB, 487 views)
File Type: jpg FINAL PCB NAGY.JPG (926.2 KB, 523 views)
File Type: jpg zkigco.jpg (312.9 KB, 618 views)
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Old 5th March 2017, 01:44 AM   #4
erikovsky is offline erikovsky
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schematics
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File Type: jpg GM-29M??.jpg (476.3 KB, 1442 views)
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Last edited by erikovsky; 5th March 2017 at 01:51 AM.
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Old 6th March 2017, 06:21 PM   #5
Unkel Phunk is offline Unkel Phunk  South Africa
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Nice.

It will definitely help a lot of people.
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Old 6th March 2017, 08:17 PM   #6
adason is offline adason  United States
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great job erikovsky
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Old 7th March 2017, 03:52 PM   #7
Fogonazo is offline Fogonazo  Argentina
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Good job !
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Old 9th March 2017, 02:14 PM   #8
erikovsky is offline erikovsky
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Thanks guys.

I am doing my own Goldmund ver.3, and I am planning to make a ver.4 with discrete VAS module.

If you have something related and important about Goldmund, please upload them and we can enjoy!
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Old 15th March 2017, 02:00 AM   #9
erikovsky is offline erikovsky
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Hi all,

I have questions about choosing current mirror BJTs.
Some options:

1. discrete MPSA42----inexpensive
2. DMMT5551----matched, dual, SMD
3. MMDTA42---- unmatched, dual , SMD

I'd prefer DMMT5551, because it's matched though lower Vcbo.
Any problems will I meet if I chose DMMT5551?
and, is MMDTA42 better than MPSA42?

thanks
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Old 15th March 2017, 12:06 PM   #10
keantoken is offline keantoken  United States
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I don't see why there would be problems. The 5551/5401 are a much better pair technically, but if the popular sound of the Goldmund has to do with the coloration of the MPSA92/42, then it may affect whether you like the result.
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