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Old 5th March 2017, 12:37 AM   #1
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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.

*****Kept updating*******
2017/3/17 Google site ON AIR!
https://sites.google.com/view/goldmund/home


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 golmund 9.2foto.jpg (312.3 KB, 205 views)
File Type: jpg Mimesis 22 inside Can.JPG (36.7 KB, 228 views)

Last edited by erikovsky; 17th March 2017 at 09:44 AM.
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Old 5th March 2017, 12:40 AM   #2
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more
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Old 5th March 2017, 12:42 AM   #3
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part3
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Old 5th March 2017, 12:44 AM   #4
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schematics
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Last edited by erikovsky; 5th March 2017 at 12:51 AM.
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Old 6th March 2017, 05:21 PM   #5
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Nice.

It will definitely help a lot of people.
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Old 6th March 2017, 07:17 PM   #6
adason is offline adason  United States
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great job erikovsky
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Old 7th March 2017, 02:52 PM   #7
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Good job !
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Old 9th March 2017, 01:14 PM   #8
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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, 01:00 AM   #9
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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, 11:06 AM   #10
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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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