Well, well!
The things happen.
With 47 ohms resistor, I got highs. Nice gentle highs, cymbals. In the same time good soft sound.
My hopes and will to work came back. I'll check and other resistors, capacitors etc.
First I added a chock to tube's power supl., and now I have a dead silent.
OK, one week off 😉
The things happen.
With 47 ohms resistor, I got highs. Nice gentle highs, cymbals. In the same time good soft sound.
My hopes and will to work came back. I'll check and other resistors, capacitors etc.
First I added a chock to tube's power supl., and now I have a dead silent.
OK, one week off 😉
Glad to hear some progress. If your using the plain 1541, it might make sense. Most people use the "A" chip. I hear the plain chip is very dynamic. Let me know how it works out. 😀
Hi,
I've been working on the non OS version. My cs8414's from China didn't work. The vendor refunded my money. I've been trying to mount the DIR9001 circuit shown on page 1 of the schematic @ http://audioworkshop.org/downloads/DIR9001_TDA1541A_V5.pdf.
on the cs8414 socket of the analog metric board. Scoping the output of the 9001. The SCK0, BCK0, LRCK0, and DOUT all look the same - a downward stair step from left to right. Anybody ever tried this before?
I've been working on the non OS version. My cs8414's from China didn't work. The vendor refunded my money. I've been trying to mount the DIR9001 circuit shown on page 1 of the schematic @ http://audioworkshop.org/downloads/DIR9001_TDA1541A_V5.pdf.
on the cs8414 socket of the analog metric board. Scoping the output of the 9001. The SCK0, BCK0, LRCK0, and DOUT all look the same - a downward stair step from left to right. Anybody ever tried this before?
DIR9001
No.... I have a much more complicated adapter from Raindrop_Hui. Play with JP2, JP3 and JP4. The settings are not clear on the schematic. Those are tied to ground or +Vcc to program. The datasheet might give you more to go on. My attempt at NOS with the DIR9001 in circuit was silent. Wonder if it was a frequency issue? In hindsight.... Isn't the DIR9001 3.3 VDC?
I used a couple of L78L33ACZ regs to get the 3.3 volts I needed. I also used the SN7HC04N to amplify the input signal from the coax. I get a signal at pin 6 going into pin 20 (RXIN) of the 9001. Still waiting for the unit from Raindrop. It appears to be hung up in NYC. Also still waiting for a new mounted cs8414. I think I'll try to build another dir9001 board with better components. According to the specs, the 9001 is a sensitive chip and they recommend using components within 5% spec. I've ordered low voltage (63v) film caps and 33 ohm 1/4w resistors. It seems to me the waveforms going into the TDA1541A should be the same with a possible difference in amplitude.
Mark I and II, receiver chip....
Hi Dwight, How did you make out with the input receiver? I got the Maple front panels this week from my woodworking friend. Once I finish installing them I'll post a picture of the Mark I and Mark II. Need to put aluminum tape on the back for shielding and may have to change power switches. He made them really thick. 😱 Dave
Hi Dwight, How did you make out with the input receiver? I got the Maple front panels this week from my woodworking friend. Once I finish installing them I'll post a picture of the Mark I and Mark II. Need to put aluminum tape on the back for shielding and may have to change power switches. He made them really thick. 😱 Dave
Just posted a final pic of the Mark I dac
http://www.diyaudio.com/forums/digital-line-level/166807-dac-gallery-9.html#post3562738 Here is a link with the Maple front in place. Need to replace the power switch on Mark II to finish that. Dave
http://www.diyaudio.com/forums/digital-line-level/166807-dac-gallery-9.html#post3562738 Here is a link with the Maple front in place. Need to replace the power switch on Mark II to finish that. Dave
I've been under the weather for the last week. As soon as I'm done with the the receiver portion, I'll give you an update.
Your results suggest that you need more gain in your tube stage. If you can live with 47 Ohms, that isn't to bad. You give up some of the THD (Total Harmonic Distortion) this way. I'd probably just live with it and enjoy. Dave
Hi,
I have not very good memory of tests with tubes with bigger amplification. The device become very sensitive to any noises. Even can hear the movement of the attenuator. But will try again.
Now, after many exchanges, yes, the 47 ohms gives the best result. Less resistance, and sound become flat. Bigger, and may be hear the distortions.
Any way.
I gone even further in my tests.
Did try the NOS. And what to say? I like it. More deep and dynamic sound. More vibrating bass. Don't feel big lack of highs. For now, I didn't make that stage for increasing the highs.
Also exchanged that DEM capacitor 470nF on TDA, with 220nF. I think, it gives me more open sound, or more hi-middles.
So, I think, is now the time, to exchange decoupling capacitors with the SMD film-caps?
I have not very good memory of tests with tubes with bigger amplification. The device become very sensitive to any noises. Even can hear the movement of the attenuator. But will try again.
Now, after many exchanges, yes, the 47 ohms gives the best result. Less resistance, and sound become flat. Bigger, and may be hear the distortions.
Any way.
I gone even further in my tests.
Did try the NOS. And what to say? I like it. More deep and dynamic sound. More vibrating bass. Don't feel big lack of highs. For now, I didn't make that stage for increasing the highs.
Also exchanged that DEM capacitor 470nF on TDA, with 220nF. I think, it gives me more open sound, or more hi-middles.
So, I think, is now the time, to exchange decoupling capacitors with the SMD film-caps?
Decoupling caps
Sounds like your ready. SMD film caps should do nicely. Be sure to keep every MM of wire short as possible. In my first build I used giant leaded PPS. Second build SMD PPS. A clearer sound on the second build. The first isn't bad at all. 🙂
Sounds like your ready. SMD film caps should do nicely. Be sure to keep every MM of wire short as possible. In my first build I used giant leaded PPS. Second build SMD PPS. A clearer sound on the second build. The first isn't bad at all. 🙂
Hi Dave,
My board from raindrop_hui came in today. I left the 470 ohm- 68nf filter on pin 20 in place. The two jumper are in LL. I get output to pins 1 and 2 of the TDA1541A. The SDATA (pin 3) is dead. What am I missing? My DIY DIR9001 boards are in worse shape.
My board from raindrop_hui came in today. I left the 470 ohm- 68nf filter on pin 20 in place. The two jumper are in LL. I get output to pins 1 and 2 of the TDA1541A. The SDATA (pin 3) is dead. What am I missing? My DIY DIR9001 boards are in worse shape.
DIR9001 to CS8412
I will check mine when I get home. If your NOS I'd check the jumper across the SAA7220 socket for continuity. There seems to be a common failing here. My guess is it's not connected somewhere. I know your CS8414's didn't work either. I remember an earlier post. The filter at pin 20 doesn't matter. The board has an on board filter network. You are getting the clock off the pin 19 MCK? 😕
I will check mine when I get home. If your NOS I'd check the jumper across the SAA7220 socket for continuity. There seems to be a common failing here. My guess is it's not connected somewhere. I know your CS8414's didn't work either. I remember an earlier post. The filter at pin 20 doesn't matter. The board has an on board filter network. You are getting the clock off the pin 19 MCK? 😕
Since the circuit should provide its own filter, I'll ground pin 20 of the socket. I checked the outputs of the receiver at pins 1, 2 and 3 of the SAA7220. They are shorted to pins 1, 2 and 3 of the TDA1541 respectively. I believe pin 19 of the cs8414 socket is open. According to the specs, the DIR90001 does not require an external clock.
DIR9001 adapter
Correct the DIR9001 adapter is putting out a Master clock on pin 19, you still need that for the System clock. (?) I think you need the added jumper for the system clock to the TDA1541A. I am not using NOS at this time, it didn't work for me. Some use the 4040 from the original circuit to divide the frequency for the TDA chip. I wonder if that is where the hang up is?
Not sure which jumper you are referring to here.
I see what looks to be good sck, bck signals on pins 4 and 2 of the TDA1541a.
The LE/WS (LRCK0) on pin 1 looks right to me.
I checked pin 9 of the 9001, input signal there. I also checked 26 of the 9001 for a signal, nothing.
DIR9001
Hi Dwight, I have 2 of these adapters. Never an issue unless the jumper configuration was wrong. There are 2 jumper plug positions. One selects I2S, the other is 16 Bit, 2's complement, MSB first otherwise known as Sony mode. As far as the signal goes for NOS. I know 3 jumpers across the SAA7220 socket. I was thinking you might still need the system clock or MCK from pin 19. Sadly I don't know for sure on that. I read about others using the 4040 as a divider to feed the TDA. Again... I am not clear on those details. Google a NOS dac with the 1541A and see if there is a 4th signal needed. My NOS attempt was silent until restoring the digital filter and all was normal after that. Maybe someone can chime in and give you better help. With the SM5814 digital filter I use it is unclear if I am missing out on anything vs the NOS method. 😉
Hi Dwight, I have 2 of these adapters. Never an issue unless the jumper configuration was wrong. There are 2 jumper plug positions. One selects I2S, the other is 16 Bit, 2's complement, MSB first otherwise known as Sony mode. As far as the signal goes for NOS. I know 3 jumpers across the SAA7220 socket. I was thinking you might still need the system clock or MCK from pin 19. Sadly I don't know for sure on that. I read about others using the 4040 as a divider to feed the TDA. Again... I am not clear on those details. Google a NOS dac with the 1541A and see if there is a 4th signal needed. My NOS attempt was silent until restoring the digital filter and all was normal after that. Maybe someone can chime in and give you better help. With the SM5814 digital filter I use it is unclear if I am missing out on anything vs the NOS method. 😉
My just finished DAC
http://www.diyaudio.com/forums/digital-line-level/166807-dac-gallery-10.html#post3570456 Here is a link. Looks nice with the Maple front plate. 😀
http://www.diyaudio.com/forums/digital-line-level/166807-dac-gallery-10.html#post3570456 Here is a link. Looks nice with the Maple front plate. 😀
Totally Frustrated. I've built two cs8414 boards, don't work. Bought another cs8414 board from ebay, doesn't work. Tried DIR9001 board from Hui. Doesn't work. No output on pin 26 of cs8414 - pin 3 of tda1541a from anything. I wasted time and money on this crap. I'm tempted to take a sledge hammer to the whole hobby.
Don't give up. Divide and conquer
There is an issue somewhere around the socket yet. Can't tell you what however. I feel your pain. Same thing with a clock delay circuit I built. Should work... Doesn't.