At the amp
First of all you need to re locate the volume control to the amp with the minimum of cable between it and the first active stage. Beyond that I don't know where your mismatch lies.
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First of all you need to re locate the volume control to the amp with the minimum of cable between it and the first active stage. Beyond that I don't know where your mismatch lies.
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If you are talking about the Sowters I got from you, then I certainly agree! It's one of the few transformers I don't like.
I may be a matter of taste or of system, but I certainly prefer the transformer output over cap. The caps sound too raw and harsh to me. I couldn't quite make out what load you are running, but I like to be at about 2-3K as a load on the chip.
I'd still love to hear a good active output stage, may be something combining tubes and tranfos.
help please!
hi every one
i'm tying to put together my dac kit and a pair of TAM output transformer from eBay. but i got a terrible noise as well!
i checked everything including direct sound from the chip. it is healthy.
could some of the masters tell me please what can be wrong?
best regards
hi every one
i'm tying to put together my dac kit and a pair of TAM output transformer from eBay. but i got a terrible noise as well!
i checked everything including direct sound from the chip. it is healthy.
could some of the masters tell me please what can be wrong?
best regards
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the reason I guess as photos show there is plenty of rust around the terminals on the top of both transformers. have they been in a balcony somehow under the tropical rain? or in a watery basement? so the water has damaged the core and/or winding of transformers?
I sent it back to the seller and got the money back. good boy!
best regards
I asked because i bought the same as you, but mines seems to be in better state..i hope soo. I'm still waiting some components.
Direct, the mood I finally made it!
My first try to get Ak4396 kit work in direct mood was a failure. But I keep trying by working on the volume control as Sandller advice. It is a shunt attenuator with 10k shunt resistor parallel. I replaced it with a 2.4k carbon foil same value from AK4396 datasheet. And it made the trix.
I replaced the 3 elctrolytics in power supply too, thanks to Erin. Three Mundorf 15000uf are playing the bass notes to Patricia Barber’s “Autumn Leaves”.
The sound is totally different vs the same board with a LME49720. I have made two, the only way to get own experience in this endless discussions.
Direct mood sounds very relaxed filling bass slam in stomach. Although rhythm and pace is there, more obvious, intimate yes sexy. Never experienced from a digital source before, maybe 12 years ago from a Linn top player.
The board with opamp sounds good. Every thing is there but fasten, stressed someone called it, hard not enjoyable as direct mood.
Although I did not put money on the coupling caps(suspicious at the beginning). 10uf Nichicon ES (says better than BG N serie) on 0.1uf pio CCCP to the attenuator and 10uf Nichi to the gnd. I guess the PIOs are not suitable in this bypass. Problem with big orchestral! Teflon may works better? Waiting from Russia by doller.
Looking to Jantzen Superior or Silver mkp as well vs Mundorf silver/oil witch costs double! Do not know if the they worth the price (2x €53 for 4.7uf)
Any suggestion that is easy to order from Europe?
My first try to get Ak4396 kit work in direct mood was a failure. But I keep trying by working on the volume control as Sandller advice. It is a shunt attenuator with 10k shunt resistor parallel. I replaced it with a 2.4k carbon foil same value from AK4396 datasheet. And it made the trix.
I replaced the 3 elctrolytics in power supply too, thanks to Erin. Three Mundorf 15000uf are playing the bass notes to Patricia Barber’s “Autumn Leaves”.
The sound is totally different vs the same board with a LME49720. I have made two, the only way to get own experience in this endless discussions.
Direct mood sounds very relaxed filling bass slam in stomach. Although rhythm and pace is there, more obvious, intimate yes sexy. Never experienced from a digital source before, maybe 12 years ago from a Linn top player.
The board with opamp sounds good. Every thing is there but fasten, stressed someone called it, hard not enjoyable as direct mood.
Although I did not put money on the coupling caps(suspicious at the beginning). 10uf Nichicon ES (says better than BG N serie) on 0.1uf pio CCCP to the attenuator and 10uf Nichi to the gnd. I guess the PIOs are not suitable in this bypass. Problem with big orchestral! Teflon may works better? Waiting from Russia by doller.
Looking to Jantzen Superior or Silver mkp as well vs Mundorf silver/oil witch costs double! Do not know if the they worth the price (2x €53 for 4.7uf)
Any suggestion that is easy to order from Europe?
Attachments
Ah that seems like a tube guy into DACs 😉 Please keep stuff small in a DAC and either use shielded wire or twist both wires as you created nice antennas now. Keeping it tidy and small might make a better investment than material choice/parts choice.
http://www.diyaudio.com/forums/chip-amps/16988-wires-twist.html
http://www.diyaudio.com/forums/chip-amps/16988-wires-twist.html
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thank you jean-paul. it's only my second project! and i put this dac-board into my passive pre-amp. the twisting thread made me more twisted! would you point out what is exactly wrong in this case and what should be done? thanx in advance.
Get the last missing components... fire up and ...only some noises !
These TAMradio transfos from Ebay are dead !
I've use two caps (20uF russian paper/oil)... the board is working (clean sound but no bass).
Nosian, is there a simple way to have some bass with caps ?
These TAMradio transfos from Ebay are dead !
I've use two caps (20uF russian paper/oil)... the board is working (clean sound but no bass).
Nosian, is there a simple way to have some bass with caps ?
What is the input impedance of your next stage? Do you mean .2uf paper in oil, not familiar with 20uf russian p-io.
hi Jef
I used this cocktail:
10uf Nichicon ES £0.25!(says better than BG N serie + very bassy) on 0.1uf pio CCCP. I hear the PIOs are not suitable in this bypass. Problem with big orchestral! Teflon may works better!? Waiting from Russia by dollar.
Wima mpk10 is a "budget champion" according to some tests i red recently. did not tested my self, and wonder if anybody has done it?
I used this cocktail:
10uf Nichicon ES £0.25!(says better than BG N serie + very bassy) on 0.1uf pio CCCP. I hear the PIOs are not suitable in this bypass. Problem with big orchestral! Teflon may works better!? Waiting from Russia by dollar.
Wima mpk10 is a "budget champion" according to some tests i red recently. did not tested my self, and wonder if anybody has done it?
#203:
Nosian: you have to connect mid point of the primary tranformer's part to the 2.5V!
You'll need two equal resistors (to the ground and to +5V), 2.4...2.7K. And capacitor to the ground.
Secondary wire of transformer: black wire -> to the ground.
Nosian: you have to connect mid point of the primary tranformer's part to the 2.5V!
You'll need two equal resistors (to the ground and to +5V), 2.4...2.7K. And capacitor to the ground.
Secondary wire of transformer: black wire -> to the ground.
I have the same conclusions with Russian PIO !!!! good sound but not for the bass .
You can see on the picture the circuit .
Do we need to put a resistor between the AK output and the capacitor ?
Is there a solution for a discret output stage ?
Thanks
Serge
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Only one that I have seen that uses the balanced output of the DAC to get the full CMMR needed to meet the DAC chip specs is from Ray's Audio:
Such a simple passive outputs gives spiny, sharp, uncomfortable sound. You'll be tired after short time listening. Very good for the sounds, useless for music and pleasure.
At least use one opamp to buffer the signal... )I was reading this post trying to find solutions for this dac output after failing to build the tda1541 dac ...
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