TDA1543
My first one and the one I am using almost exclusively is one Peter Daniel's Audiosector DAC's. This is one of the last ones with the full BG package and also has the Bobken reg on it. Cased in massive ureol (very dense and hard foam) with Amboina veneer and a tinted stripe of plexi.
My first one and the one I am using almost exclusively is one Peter Daniel's Audiosector DAC's. This is one of the last ones with the full BG package and also has the Bobken reg on it. Cased in massive ureol (very dense and hard foam) with Amboina veneer and a tinted stripe of plexi.
Attachments
wish I knew where to get those double C-Cores, do you happen to know what brand it is mate? lovely casework as always Stixx! I have a nice chunk of Amboina waiting for a suitable project, very sexy wood. cant say the tda1543 ever did much for me, much lower subjective and objective resolution than the other gear you are using, too 'musical' for my taste
ahh, my mistake, i'm not really up on transformer exotica, what type is it? (nevermind, the link looks right, split bobbin 'semi-toroidal')
I thought C-Core, because i feel pretty sure its exactly the same, or similar model as used in the Berkeley Alpha Dac 2 and when I saw internal pics of that dac, I posted to ask what type of transformer it was and was told double C-Core.
anyway Bas, do you know where I can get smallish dac size C-Core TX? i've seen other good press on C-Cores
I thought C-Core, because i feel pretty sure its exactly the same, or similar model as used in the Berkeley Alpha Dac 2 and when I saw internal pics of that dac, I posted to ask what type of transformer it was and was told double C-Core.
anyway Bas, do you know where I can get smallish dac size C-Core TX? i've seen other good press on C-Cores
Last edited:
I've always called that type pictured above "semi-toroidal" (assuming it is what I think it is).
As to your second q, the Japanese are fond of small C-core power and line transformers.
As to your second q, the Japanese are fond of small C-core power and line transformers.
C-cores are great for output transformer duty. But I don't really see the point as a power transformer. The dual bobbin as used by Peter Daniel is great because it does not let as much rubbish through from the mains even compared to an EI transformer and much more so than a toroidal.
I've never used them...unfortunately I don't know where to get them from either...sorry.
I did a google for the Berkeley Dac...and it uses dual single bobbin transformers as well. The guys on that forum misinformed you 🙂. They may look similar to C-cores but they are not afaik.
Did a quick google. Mouser has got them. Shipping from mouser is for free to the Netherlands if your order is larger than 65 euro's or something. Mouser is awesome to deal with. Not sure if the service to Australia is stellar as well.
that would be this forum 😉 quite a while ago though, not long after the Berkeley Dac was released. yes, clearly incorrect.
I use Mouser all the time, I have mixed feelings about them, love the free shipping on $200+ orders, but their inventory system is quite terrible. not really interested in them if its hybrid EI/toroidal, i'll go R-Cores from selectronic before them and i'm otherwise pretty well stocked for anything in the near future, thanks for checking into it for me though!
I use Mouser all the time, I have mixed feelings about them, love the free shipping on $200+ orders, but their inventory system is quite terrible. not really interested in them if its hybrid EI/toroidal, i'll go R-Cores from selectronic before them and i'm otherwise pretty well stocked for anything in the near future, thanks for checking into it for me though!
hmm, so nothing worth less than a small 4 cylinder used car then?nattonrice said:
Last edited:
A local winder told me that the dual bobbin transformers as used in the Berkeley DAC are also called UI transformers. The EI as you may know has a single bobbin.
And just like the EI the UI has a laminated core....but its geometry looks almost like a single C-core. In this case a single core with dual bobbins. The advantage is that a larger part of the core is surrounded by the bobbins(similar to that of a toroidal) and therefore has less of a magnetic signature.
The winder told me that they (Berkeley) probably chose a UI transformer because the have a very low profile.
The advantage of a c-core compared to an EI is greater efficiency. (Smaller core (weight ) but with the same "power". This is because the core is a coil of silicium iron just like a toroidal. The EI AND UI have a less efficient geometry
And just like the EI the UI has a laminated core....but its geometry looks almost like a single C-core. In this case a single core with dual bobbins. The advantage is that a larger part of the core is surrounded by the bobbins(similar to that of a toroidal) and therefore has less of a magnetic signature.
The winder told me that they (Berkeley) probably chose a UI transformer because the have a very low profile.
The advantage of a c-core compared to an EI is greater efficiency. (Smaller core (weight ) but with the same "power". This is because the core is a coil of silicium iron just like a toroidal. The EI AND UI have a less efficient geometry
They don't *have* to be over the top jewelry lol
There are a fair few places that will wind what you want, the big L, tribute and monolith come to mind.
Big L? you mean Lundahl? custom iron from any of those guys wont be cheap. all I come up with when I gogle Big L + transformers is references to some godawful rapper that featured on the transformers movie soundtrack
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
battery powered tda1543. russian pio cap sounds excellent in decoupling
My little tube output DAC:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
btw thanks for the links and info Bas, forgot to say in my post above.
McGyver:
large russian PIO for digital supply or clock decoupling? ... no comment.
like the simple wooden box though!
McGyver:
large russian PIO for digital supply or clock decoupling? ... no comment.
like the simple wooden box though!
Last edited: