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CAL Sigma 2 Tube DAC modifications
3 posters
Hi-Fi 4 Sale - Malaysia / Singapore Audio Forum & Marketplace | www.hifi4sale.net :: Discussion Forum & Knowledge Base :: DIY Projects
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CAL Sigma 2 Tube DAC modifications
by timurmusicfan Fri Jan 29, 2016 10:04 am
Greetings to all the Sifus and DIYers out there,
I am thinking of doing some mods/upgrade of my 10 year old DAC. I really like the sound (and it matches the rest of my system).
Anyone has some experience with this one?
Surfing the net, I only found a single DIY mode. That is how to improve the casing...not the electronics.
Thanks in advance for any suggestions.
Muhsin
I am thinking of doing some mods/upgrade of my 10 year old DAC. I really like the sound (and it matches the rest of my system).
Anyone has some experience with this one?
Surfing the net, I only found a single DIY mode. That is how to improve the casing...not the electronics.
Thanks in advance for any suggestions.
Muhsin
timurmusicfan- Frequent Contributor
- Number of posts : 263
Age : 63
Location : Cyberjaya
Registration date : 2010-04-15
Re: CAL Sigma 2 Tube DAC modifications
by vt4c Fri Jan 29, 2016 8:42 pm
No sifu here...
Some recommendations....
1.) You may do some tube rolling on the 12AX7 it uses.
2.) Change the output coupling caps to some FT-3 Russian Teflon caps.
3.) Since it's 10 years now, changing all the electrolytic caps might be a good idea.
Some recommendations....
1.) You may do some tube rolling on the 12AX7 it uses.
2.) Change the output coupling caps to some FT-3 Russian Teflon caps.
3.) Since it's 10 years now, changing all the electrolytic caps might be a good idea.
Last edited by vt4c on Fri Jan 29, 2016 10:20 pm; edited 1 time in total
vt4c- Frequent Contributor
- Number of posts : 159
Age : 55
Location : M'sia
Registration date : 2009-05-09
Tube rolling
by timurmusicfan Fri Jan 29, 2016 9:08 pm
Thank you for quick reply and suggestions.
I have tried a few tubes and found the vintage Telefunken 12ax7 and new Sovtek 12ax7wxt+ the best.
Will try the coupling caps next.
Cheerio,
Muhsin
I have tried a few tubes and found the vintage Telefunken 12ax7 and new Sovtek 12ax7wxt+ the best.
Will try the coupling caps next.
Cheerio,
Muhsin
timurmusicfan- Frequent Contributor
- Number of posts : 263
Age : 63
Location : Cyberjaya
Registration date : 2010-04-15
Re: CAL Sigma 2 Tube DAC modifications
by RoyStukel Sat Feb 27, 2016 4:20 pm
As per my experience you must use the tube rolling on the 12AX7.
Also try by changing the output coupling caps to some FT-3 Russian Teflon caps.
As per my knowledge changing all the electrolytic caps might be a good idea.
http://www.7pcb.co.uk
Also try by changing the output coupling caps to some FT-3 Russian Teflon caps.
As per my knowledge changing all the electrolytic caps might be a good idea.
http://www.7pcb.co.uk
RoyStukel- New Member
- Number of posts : 1
Age : 38
Location : Canada
Registration date : 2016-02-27
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Hi-Fi 4 Sale - Malaysia / Singapore Audio Forum & Marketplace | www.hifi4sale.net :: Discussion Forum & Knowledge Base :: DIY Projects
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