Would you give us a single reason for why Panasonic FC is not good for filtering digital ic's? Some would argue that even lower esr are needed like Sanyo Oscon's!
That's what they say, but i never trusted capacitors smaller in size than the FC's and the FC's aren't even the biggest ones!I used FM too, i couldn't complain yet , but i've worked in a few high tech industries and Panasonic FC still is a good standard, among others.
For anything digital or non critical audio, those parts are very solid performers, would be my choice also, in a production industrial environment. I keep the ones I have removed from analog circuits, and use them for the ancillary portions of my projects, protection circuits, displays, etc.
The fm ones are almost too low in esr for many uses also.
Also to replace the output resistors, if there are any, with some of the Caddock film resistors will clear things up a notch.
The fm ones are almost too low in esr for many uses also.
Also to replace the output resistors, if there are any, with some of the Caddock film resistors will clear things up a notch.
Last edited:
Forum dedicated to PCM1794A AK4118 + solution to all problems of the PCM1794 AK4118 Chinese tile (Polish Audio Forum , Audio, Stereo, Hi Fi, Hi End, Video - Sprzęt audio - Audiostereo.pl )
Hello
Some time ago, I promised on the forum that I would pass the report after receiving the DAC from the site and after listening. First things first.
Immediately after receiving the plate from Chinese, it looked like this:
[URL = https: //www.fotosik.pl/zdjecie/24b2534f53863a2f] [url]https://images92.fotosik.pl/115/24b2534f53863a2fmed.jpg[/url] [/ IMG] [/ URL]
The next steps related to the modernization consisted in the purchase of the housing for the above-mentioned PCM1794 AK4118 tile and the purchase of the transformer of the audio version from Toroidy.pl and the XMOS U8 board.
Transformer: audio version, TS40VA, Pri: 230V, Sec I: (2 x 9) V, Sec II: (12-0-12) V
[URL = https: //www.fotosik.pl/zdjecie/ebb41da0173f0c6f] [IMG] [url]https://images91.fotosik.pl/115/ebb41da0173f0c6fmed.jpg[/url] [/ IMG] [/ URL]
Housing: Breeze Audio with the BZ2806B symbol (external dimensions, 280x210x60 mm)
USB card: XMOS U8, 24 / 192K
[URL = https: //www.fotosik.pl/zdjecie/69faccb7b6f934a9] [IMG] [url]https://images89.fotosik.pl/115/69faccb7b6f934a9med.jpg[/url] [/ IMG] [/ URL]
While waiting for the housing and transformer as well as the XMOS U8 card, substitution of components was started.
Listed:
a) all Chinese capacitors "red drops" i.e. from 270pF to capacitors WIMA FKP 2700pF / 250V (4 pcs) and 222 pF to capacitors WIMA FKP 2200pF / 100V, (4 pcs),
b) all blue, Chinese capacitors 104, (u1K100) are replaced with WIMA 1uK / 63V foil (9pcs)
c) changed blue, Chinese foil capacitors "allegedly 820pF" (220pF / 630V) into foil WIMA FKP 6800pF / 630V (2 pcs)
d) Most of the SAMWHA electronic capacitors on Nichicon FW have been replaced and one place for 4 x Nichicon KZ MUZE
e) three Chinese AD827JN opiums have been replaced with: 2x OPA 1612A + 1x OPA 2132PA
f) Chinese voltage stabilizers LM337 (1pc) + LM317T (2pc) are replaced with Linear LT337A brand stabilizers (1pc) + LT317A (2pc)
g) mentioned in the power supply part Chinese diodes for fast, branded Vishay SBYV27-200 diodes (8 pcs)
(h) an ordinary 1,5A glass fuse has been used in the IEC gate
i) a 2mm thick rectangular aluminum frame was ordered for dimensions of 2mm to avoid puncturing the factory housing and only then to mount all DAC elements, and a heat-resistant 0.2mm thick teflon mat with a dimension of 400 x 330 mm was ordered for this base (for lining and isolate the base)
j) a piece of brass sheet was purchased and then bent on a bending machine to perform shielding protecting against the impact of the negative impact of a toroidal transformer.
The whole, after being assembled and mounted in the housing in its place, was commissioned to check and detect the reason why the DAC was warming up on radiators and did not want to play on the second channel.
As it turned out, the reason was shorting on the condenser and damaging the path on the PCB during soldering.
[URL = https: //www.fotosik.pl/zdjecie/0741331b72d7501c] [IMG] [url]https://images90.fotosik.pl/114/0741331b72d7501cmed.jpg[/url] [/ IMG] [/ URL]
Also some time ago I had a yellow film capacitors 6800pF / 100V (2 pcs) installed in place of blue, Chinese 820pF (220pF / 630) and yellow capacitors 2700pF / 100V (4pc) instead of "red drops", Chinese 270pF (271J) / 100A).
The sound was muffled and did not bring satisfaction from the music being listened to. I do not recommend .
[URL = https: //www.fotosik.pl/zdjecie/a160765dcee473ce] [IMG] [url]https://images90.fotosik.pl/114/a160765dcee473cemed.jpg[/url] [/ IMG] [/ URL]
That's why I exchanged all foil capacitors for the original red WIMY FKP.
And now you can say that it is much better. Good capacitors, price / quality, foil FKP Wima.
It was possible to use Silver Mica capacitors because it supposedly "ennobles silver" but I could not find them about the paramounts I am interested in, and the price was not encouraging after the total calculation together with the transport.
Currently, the music is being listened to via the USB socket:
Lenovo G580 laptop + USB + DAC cable based on PCM1794 AK4118 board with XMOS U8 card + Creative Inspire 5.1 5300 speakers.
In the laptop I made in the volume settings: 24 bits / 192000 Hz and the volume per max (i.e., 100%).
The DAC display on the display shows sampling of the SAMPLING audio signal: 44kHz / 192K (if this is the case, it would have to be checked by means of measuring devices that I do not have).
[URL = https: //www.fotosik.pl/zdjecie/3b18d69d7ff7e8af] [IMG] [url]https://images89.fotosik.pl/115/3b18d69d7ff7e8afmed.jpg[/url] [/ IMG] [/ URL]
For sure listening to music through the "jack" jack or optical jack improves the sound quality in relation to USB and I will strive to make it happen.
There are plans to replace Creative Inspire 5.1 5300 loudspeakers with 2.0 Edifier R2730DB type loudspeakers, because these Creativs "restrict me with sound" have tiny speakers and should be 2 or 3 way loudspeakers with at least one of them a 6-inch speaker.
The next step maybe there will be an attempt to substitute about 5 pcs Nichicon FW 47uF / 50V elecronic capacitors on the Nichicon 47uF / 50V KZ Muze near the PCM1794 chip (Nichicon KZ Muze have a diameter of 10mm and not 6mm and this creates a problem that should be considered how to do it). In the future, I might be tempted by the DAC's lanterns.
Finally, this is how it looks:
[URL = https: //www.fotosik.pl/zdjecie/801aad5ada363145] [IMG] [url]https://images90.fotosik.pl/114/801aad5ada363145med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/2394542598875d90] [IMG] [url]https://images91.fotosik.pl/115/2394542598875d90med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/c99ee3be9869f931] [IMG] [url]https://images92.fotosik.pl/115/c99ee3be9869f931med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/f35a2eed6ac8ac1c] [IMG] [url]https://images92.fotosik.pl/115/f35a2eed6ac8ac1cmed.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/55b69afd500f6284] [IMG] [url]https://images89.fotosik.pl/115/55b69afd500f6284med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/b441e409bbe0ba1b] [IMG] [url]https://images92.fotosik.pl/115/b441e409bbe0ba1bmed.jpg[/url] [/ IMG] [/ URL]
Summary :
I am not an audiophile or an electronics technician only a practical user of the modified DAC equipment. At the moment I'm happy with the sound. If you want to know how music sounds in your audio equipment - buy it, modify PCM1794 AK4118 and see for yourself. Combinations are many and gaining experience through science and experimentation - priceless. You can always get better and more.
Hello
Some time ago, I promised on the forum that I would pass the report after receiving the DAC from the site and after listening. First things first.
Immediately after receiving the plate from Chinese, it looked like this:
[URL = https: //www.fotosik.pl/zdjecie/24b2534f53863a2f] [url]https://images92.fotosik.pl/115/24b2534f53863a2fmed.jpg[/url] [/ IMG] [/ URL]
The next steps related to the modernization consisted in the purchase of the housing for the above-mentioned PCM1794 AK4118 tile and the purchase of the transformer of the audio version from Toroidy.pl and the XMOS U8 board.
Transformer: audio version, TS40VA, Pri: 230V, Sec I: (2 x 9) V, Sec II: (12-0-12) V
[URL = https: //www.fotosik.pl/zdjecie/ebb41da0173f0c6f] [IMG] [url]https://images91.fotosik.pl/115/ebb41da0173f0c6fmed.jpg[/url] [/ IMG] [/ URL]
Housing: Breeze Audio with the BZ2806B symbol (external dimensions, 280x210x60 mm)
USB card: XMOS U8, 24 / 192K
[URL = https: //www.fotosik.pl/zdjecie/69faccb7b6f934a9] [IMG] [url]https://images89.fotosik.pl/115/69faccb7b6f934a9med.jpg[/url] [/ IMG] [/ URL]
While waiting for the housing and transformer as well as the XMOS U8 card, substitution of components was started.
Listed:
a) all Chinese capacitors "red drops" i.e. from 270pF to capacitors WIMA FKP 2700pF / 250V (4 pcs) and 222 pF to capacitors WIMA FKP 2200pF / 100V, (4 pcs),
b) all blue, Chinese capacitors 104, (u1K100) are replaced with WIMA 1uK / 63V foil (9pcs)
c) changed blue, Chinese foil capacitors "allegedly 820pF" (220pF / 630V) into foil WIMA FKP 6800pF / 630V (2 pcs)
d) Most of the SAMWHA electronic capacitors on Nichicon FW have been replaced and one place for 4 x Nichicon KZ MUZE
e) three Chinese AD827JN opiums have been replaced with: 2x OPA 1612A + 1x OPA 2132PA
f) Chinese voltage stabilizers LM337 (1pc) + LM317T (2pc) are replaced with Linear LT337A brand stabilizers (1pc) + LT317A (2pc)
g) mentioned in the power supply part Chinese diodes for fast, branded Vishay SBYV27-200 diodes (8 pcs)
(h) an ordinary 1,5A glass fuse has been used in the IEC gate
i) a 2mm thick rectangular aluminum frame was ordered for dimensions of 2mm to avoid puncturing the factory housing and only then to mount all DAC elements, and a heat-resistant 0.2mm thick teflon mat with a dimension of 400 x 330 mm was ordered for this base (for lining and isolate the base)
j) a piece of brass sheet was purchased and then bent on a bending machine to perform shielding protecting against the impact of the negative impact of a toroidal transformer.
The whole, after being assembled and mounted in the housing in its place, was commissioned to check and detect the reason why the DAC was warming up on radiators and did not want to play on the second channel.
As it turned out, the reason was shorting on the condenser and damaging the path on the PCB during soldering.
[URL = https: //www.fotosik.pl/zdjecie/0741331b72d7501c] [IMG] [url]https://images90.fotosik.pl/114/0741331b72d7501cmed.jpg[/url] [/ IMG] [/ URL]
Also some time ago I had a yellow film capacitors 6800pF / 100V (2 pcs) installed in place of blue, Chinese 820pF (220pF / 630) and yellow capacitors 2700pF / 100V (4pc) instead of "red drops", Chinese 270pF (271J) / 100A).
The sound was muffled and did not bring satisfaction from the music being listened to. I do not recommend .
[URL = https: //www.fotosik.pl/zdjecie/a160765dcee473ce] [IMG] [url]https://images90.fotosik.pl/114/a160765dcee473cemed.jpg[/url] [/ IMG] [/ URL]
That's why I exchanged all foil capacitors for the original red WIMY FKP.
And now you can say that it is much better. Good capacitors, price / quality, foil FKP Wima.
It was possible to use Silver Mica capacitors because it supposedly "ennobles silver" but I could not find them about the paramounts I am interested in, and the price was not encouraging after the total calculation together with the transport.
Currently, the music is being listened to via the USB socket:
Lenovo G580 laptop + USB + DAC cable based on PCM1794 AK4118 board with XMOS U8 card + Creative Inspire 5.1 5300 speakers.
In the laptop I made in the volume settings: 24 bits / 192000 Hz and the volume per max (i.e., 100%).
The DAC display on the display shows sampling of the SAMPLING audio signal: 44kHz / 192K (if this is the case, it would have to be checked by means of measuring devices that I do not have).
[URL = https: //www.fotosik.pl/zdjecie/3b18d69d7ff7e8af] [IMG] [url]https://images89.fotosik.pl/115/3b18d69d7ff7e8afmed.jpg[/url] [/ IMG] [/ URL]
For sure listening to music through the "jack" jack or optical jack improves the sound quality in relation to USB and I will strive to make it happen.
There are plans to replace Creative Inspire 5.1 5300 loudspeakers with 2.0 Edifier R2730DB type loudspeakers, because these Creativs "restrict me with sound" have tiny speakers and should be 2 or 3 way loudspeakers with at least one of them a 6-inch speaker.
The next step maybe there will be an attempt to substitute about 5 pcs Nichicon FW 47uF / 50V elecronic capacitors on the Nichicon 47uF / 50V KZ Muze near the PCM1794 chip (Nichicon KZ Muze have a diameter of 10mm and not 6mm and this creates a problem that should be considered how to do it). In the future, I might be tempted by the DAC's lanterns.
Finally, this is how it looks:
[URL = https: //www.fotosik.pl/zdjecie/801aad5ada363145] [IMG] [url]https://images90.fotosik.pl/114/801aad5ada363145med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/2394542598875d90] [IMG] [url]https://images91.fotosik.pl/115/2394542598875d90med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/c99ee3be9869f931] [IMG] [url]https://images92.fotosik.pl/115/c99ee3be9869f931med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/f35a2eed6ac8ac1c] [IMG] [url]https://images92.fotosik.pl/115/f35a2eed6ac8ac1cmed.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/55b69afd500f6284] [IMG] [url]https://images89.fotosik.pl/115/55b69afd500f6284med.jpg[/url] [/ IMG] [/ URL]
[URL = https: //www.fotosik.pl/zdjecie/b441e409bbe0ba1b] [IMG] [url]https://images92.fotosik.pl/115/b441e409bbe0ba1bmed.jpg[/url] [/ IMG] [/ URL]
Summary :
I am not an audiophile or an electronics technician only a practical user of the modified DAC equipment. At the moment I'm happy with the sound. If you want to know how music sounds in your audio equipment - buy it, modify PCM1794 AK4118 and see for yourself. Combinations are many and gaining experience through science and experimentation - priceless. You can always get better and more.
Thank you for recognizing "Chermann".
I am at the stage of the next project of the DAC converter only, that on the plates from Ciry Audio PCM1794A + AK4118 + USB Amanero + change of opam on 6xAD744 + 4xLT1634. I am planning to make a COMBO type transducer; in the OPAM + version Lampowa version (2 x Amperex E88CC lamp etc.).
How comprehensively it will be done, I will try to publish on the forum for the benefit of the community Error 404 - Page Missing.
I greet everyone.
I am at the stage of the next project of the DAC converter only, that on the plates from Ciry Audio PCM1794A + AK4118 + USB Amanero + change of opam on 6xAD744 + 4xLT1634. I am planning to make a COMBO type transducer; in the OPAM + version Lampowa version (2 x Amperex E88CC lamp etc.).
How comprehensively it will be done, I will try to publish on the forum for the benefit of the community Error 404 - Page Missing.
I greet everyone.
Under this link Chiński DAC PCM1794 + AK4118 DAC - DIY - Audiostereo.pl is the entire thread devoted to problems and ways to solve the problems of the PCM1794 AK4118 Chinese tile (from January 2018 to today).
congratulations
very clever choice of modules
would you please describe change In sound (If there was) when you just change stock OPA to OPA1612 and OPA2132
Interested to know how do you connect XMOS board and pcm1794 board using just 2 wires
very clever choice of modules
would you please describe change In sound (If there was) when you just change stock OPA to OPA1612 and OPA2132
Interested to know how do you connect XMOS board and pcm1794 board using just 2 wires
Hey, thanks for the interesting discussion. I have chosen the PCM1794 after I read this article, which has in depth measurement/analysis/comparison of delta-sigma/multibit DACs and their differences. You may find it interesting: Какой звуковой ЦАП лучше? — Меандр — занимательная электроника. It is in russian so you should probably use Google Translate.
By the way, here is the whole setup in a temporary enclosure out of a Polo RL scarfuntil I find someone with a CNC nice enough to make me two simillar enclosures.
The setup consists of:
- A DIY AC filter
- 2x15VAC+2x9VAC R-Core transformer feeding the DAC board
- 2x7,5VAC feeding the XMOS reclock and Raspberry Pi
- Raspberry Pi 3 running Volumio fed by a LT1083 + CRC filter PSU(on the black prototype PCB, painted black with a spray can)
- JLSounds XMOS, with it's reclock after galvanic barrier fed by an LM317 + CRC PSU(also on the black board)
- The modified chinese PCM1794 board
- An LCD display+MCU+rotary switch that came with the chinese board used to switch digital inputs and display current signal frequency
While still burning in, the sound of the PCM1794 is amazing. TBH I have never expected such a detailed sound that is still warm and pleasant to listen to from a delta-sigma DAC except for the most expensive Sabre pros. I don't believe the TDA1541 myths anymore.
The good thing is that the whole streamer/DAC costed less than 250$ including the trafos, raspberry, xmos, memory card, DAC board and all the components for the upgrade. It allows me to listen to music from online streaming services such as Spotify and Tidal, local HDD and I can still switch to the toslink coming from my TV with one click and use the DAC for Xbox(pass-through) and Netflix.
I still have to add the IR receiver for an Apple remote I have laying around but Volumio has a web interface so it's not mandatory.
Could you describe the sound change (if so), when you change the OPA OPA1612 and OPA2132
In my case, the best selection of opa is 1x OPA2132PA + 2 x OPA1612. Personally, I did not replace 3x OPA1612. I do not see such a need. However, a colleague known to you Kris_54701 from audiostereo.pl claims that the combination of 3 x OPA1612 is even better. Yet another person of marcin32 also audiostereo.pl has bought staccato and is very happy (you would have to ask him)
Interested know how to connect the plate and the plate XMOS pcm1794 using only 2 wires
I have seen this picture and thank you for giving me information on audiostereo.pl.
At present, on the audiostereo.pl portal devoted to PCM1794 AK4118 colleague gavron04 is at the stage of experimenting to extract I2S signals (LRCK, DATA, BCK, SCK) Pinout I2S AK4118 <> PCM1794 removing 4 resistors 33r and mounting goldpins near the PCM1794A chip Chiński DAC PCM1794 + AK4118 DAC - DIY - Audiostereo.pl.
Is this dual pcm1794 set to mono.
I am only in the initial phase and I have purchased components. Consultations with friends on this topic are currently underway. When I'm done, I'll do a report + photos for other forum users.
In my case, the best selection of opa is 1x OPA2132PA + 2 x OPA1612. Personally, I did not replace 3x OPA1612. I do not see such a need. However, a colleague known to you Kris_54701 from audiostereo.pl claims that the combination of 3 x OPA1612 is even better. Yet another person of marcin32 also audiostereo.pl has bought staccato and is very happy (you would have to ask him)
Interested know how to connect the plate and the plate XMOS pcm1794 using only 2 wires
I have seen this picture and thank you for giving me information on audiostereo.pl.
At present, on the audiostereo.pl portal devoted to PCM1794 AK4118 colleague gavron04 is at the stage of experimenting to extract I2S signals (LRCK, DATA, BCK, SCK) Pinout I2S AK4118 <> PCM1794 removing 4 resistors 33r and mounting goldpins near the PCM1794A chip Chiński DAC PCM1794 + AK4118 DAC - DIY - Audiostereo.pl.
Is this dual pcm1794 set to mono.
I am only in the initial phase and I have purchased components. Consultations with friends on this topic are currently underway. When I'm done, I'll do a report + photos for other forum users.
The initial phase of the DAC transducer design using Dual PCM1794A + AK4118 preamp from Ciry Audio: COMBO DAC converter (OPAM / LAMPS)
DAC COMBO "Pana-Mera" (op-amp / tube pcc88 philips)
Pre-designed front and rear panel of the Combo DAC called "Pana-Mera" (op-amp / nos tube). 2 system transducer based on AD744 + LT1364 op-amp amplifiers and TUBE PCC88 Philips separately. Work on the construction of the DAC is moving forward slowly. The next step will be to make an amplifier and a preamp called "Pana_Mera" based on the Accuphase A60 + clone.
Pre-designed front and rear panel of the Combo DAC called "Pana-Mera" (op-amp / nos tube). 2 system transducer based on AD744 + LT1364 op-amp amplifiers and TUBE PCC88 Philips separately. Work on the construction of the DAC is moving forward slowly. The next step will be to make an amplifier and a preamp called "Pana_Mera" based on the Accuphase A60 + clone.
