An externally hosted image should be here but it was not working when we last tested it.
I am using alps rk27 for volume control and aikido octal dual mono.
🙂
Thanx for you help. I see on Amanero 2.54 pitch for output connector, are you sure it's 1.27mm?
Yes. You need 2 wire in one 2.54 pitch (flat cable). Try to keep cable as short as possibe. 2-3cm - will be Ok even at DSD512.
Personally I've tried 10cm cable without any problem at DSD256 on my Soekris dam1121. But dam has a reclock, DSC - do not.
I'm eagerly awaiting the arrival of my DSC2.5.2.
Will the Reflektor-D set to max 450ma current be sufficient for power?
Thanks
Will the Reflektor-D set to max 450ma current be sufficient for power?
Thanks
According to Pavel Pogodin's measurements, power consumption of DSC2 when using Philips 595 shift registers (default for DSC2):
DSD512 ~ 100mA per channel
DSD256 ~ 60mA per channel
DSD128 ~ 45mA per channel
Alexey Galkin (one of russian DSC 2 enthusiast) tried to use 595 shift registers from different manufactures - consumption could grow up to two times.
So for your DSC 2.5.2 - Reflector with 150 - 200mA per channel IMHO is enough.
Interesting news on upcoming new firmware Amanero from CA!?
T+a dac 8 dsd - Page 73 - DAC - Digital to Analog Conversion - Computer Audiophile
@volpone and others, this is a quick update on Amanero's firmware/driver situation.
Domenico said that he will release "very soon" firmware 2004 for Linux which should take care of distortion at high DSD frequencies (mostly at 256 and 512). Furthermore, he has to readjust his new Windows driver that will work with such firmware because of a recent Windows 10 update.
How quickly and if all this is going to be implemented by T&A, I do not know. It will be up to them to validate it once it's released.
T+a dac 8 dsd - Page 73 - DAC - Digital to Analog Conversion - Computer Audiophile
@volpone and others, this is a quick update on Amanero's firmware/driver situation.
Domenico said that he will release "very soon" firmware 2004 for Linux which should take care of distortion at high DSD frequencies (mostly at 256 and 512). Furthermore, he has to readjust his new Windows driver that will work with such firmware because of a recent Windows 10 update.
How quickly and if all this is going to be implemented by T&A, I do not know. It will be up to them to validate it once it's released.
To my understanding from an earlier reply by Vit you can switch the transformers output stage into a non-transformer output stage. However, the experiences by Pavel were in favor of the transformer stage.
Thanks for your picture and info!
Thanks, this information is very helpful and timely as I'm just starting to assemble my Reflektor-D supplies (one per channel); I'll set them up for a load of 50-100mA - with that configuration the CCS is 300mA so it will be 'burning' 200-250mA (depending on DSD rate) and I think higher will result in too much heat, but it's easy to change if more current is needed.
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I finally made some good progress with my DSC2(V2.5.2) build today.
Output section assembled using Lundahl LL1684 transformers;
I've used LCR polystyrene caps to bypass the Wima FKP (under the PCB) and in the LL1684 load.
I also assembled most of the power supplies so I just need to get the chassis metalwork drilled for it all to come together.
Output section assembled using Lundahl LL1684 transformers;
I've used LCR polystyrene caps to bypass the Wima FKP (under the PCB) and in the LL1684 load.
I also assembled most of the power supplies so I just need to get the chassis metalwork drilled for it all to come together.
I believe that the shunt voltage regulator for DSC2 will be worse than the usual LDO. Due to the low output impedance of the shunt regulator, the efficiency of the LC power circuits of the registers is greatly reduced.
Here is such a 20pin cable if I am right. 2USD without shiping, 4 cm long.
IDC Flat Cable 20pin 4cm, 10pin 10cm - DIYINHK
I have a few questions.
From the forum I understand the power requirement by the DSC V2.5.2 can be 150-200mA per channel at 5V, summing up to 300-400mA for the whole DSC V2.5.2. The user manual says 150mA at page 3.
Power supply: talking about power supply and low impedance (I saw the answer by Pavel on the low impendance of the shunt voltage regulator from Nautibuoy, which may not work well) I have a number of AMB Sigma 11 power supplies available. Do they match the DSC v2.5.2? AMB website states about the output impedance of sigma 11: ‘the σ11's output impedance is much lower than even the best low-ESR large aluminum electrolytic capacitors, having wide bandwidth allows the σ11 to respond to fast changing current demands better than a large capacitor (or a bank of capacitors) ever would’.
I can use one sigma 11 to power the Amanero (5V) and another one for the DSCV2.5.2 ( say 9 volts or 7). Would separate powering of the Amanero (instead of USB power) be beneficial for Sound Quality?
Amanero question: on the forum people speak about a modified Amanero upgraded with Crystek CCHD-957 (169 USD). Is this a better choice for SQ and if so, why?
Xmos seems to be another option now as the mute seems to work: at DIYINK they also have USB - I2S Xmos which allow for higher sampling rates (768Dxd), looks like a more capable version of the 384KHz version. Any thoughts about this one for use with the v2.5.2?
Output board: I didnt't realize the output board comes without capacitors and resistances and ferrite beads. Is that because they depend on the chosen output transformer? Then, the user manual gives only a suggestion for R65 (6 to 7 Kohm, thin film 0,25W) with stock (Chinese) transformers. How about suggested parts for C9, R130 and L21 (ferrite bead) with stock transformers. Do you have suggested part numbers from Mousers? When do we use the ferrite bead?
Is it an idea to have three small lists of suggested resistors and capacitors for the three main transformers (stock Chinese, 1684 and 1527XL), and for RCA and XLR (if that make a difference)?
From the forum I understand the power requirement by the DSC V2.5.2 can be 150-200mA per channel at 5V, summing up to 300-400mA for the whole DSC V2.5.2. The user manual says 150mA at page 3.
Power supply: talking about power supply and low impedance (I saw the answer by Pavel on the low impendance of the shunt voltage regulator from Nautibuoy, which may not work well) I have a number of AMB Sigma 11 power supplies available. Do they match the DSC v2.5.2? AMB website states about the output impedance of sigma 11: ‘the σ11's output impedance is much lower than even the best low-ESR large aluminum electrolytic capacitors, having wide bandwidth allows the σ11 to respond to fast changing current demands better than a large capacitor (or a bank of capacitors) ever would’.
I can use one sigma 11 to power the Amanero (5V) and another one for the DSCV2.5.2 ( say 9 volts or 7). Would separate powering of the Amanero (instead of USB power) be beneficial for Sound Quality?
Amanero question: on the forum people speak about a modified Amanero upgraded with Crystek CCHD-957 (169 USD). Is this a better choice for SQ and if so, why?
Xmos seems to be another option now as the mute seems to work: at DIYINK they also have USB - I2S Xmos which allow for higher sampling rates (768Dxd), looks like a more capable version of the 384KHz version. Any thoughts about this one for use with the v2.5.2?
Output board: I didnt't realize the output board comes without capacitors and resistances and ferrite beads. Is that because they depend on the chosen output transformer? Then, the user manual gives only a suggestion for R65 (6 to 7 Kohm, thin film 0,25W) with stock (Chinese) transformers. How about suggested parts for C9, R130 and L21 (ferrite bead) with stock transformers. Do you have suggested part numbers from Mousers? When do we use the ferrite bead?
Is it an idea to have three small lists of suggested resistors and capacitors for the three main transformers (stock Chinese, 1684 and 1527XL), and for RCA and XLR (if that make a difference)?
I think i destroyed my 2 small transformer (blue on picture).
I heard a buzz and temperature were extremely hot.
Return a transformer could be problematic?
I heard a buzz and temperature were extremely hot.
Return a transformer could be problematic?
Electricity shut down.
I disconnected both transformer from the circuit and i measured the voltage of secondary, i have nothing.
I think i have understimated power of the psu (capacitor at the start, etc...)
I disconnected both transformer from the circuit and i measured the voltage of secondary, i have nothing.
I think i have understimated power of the psu (capacitor at the start, etc...)
I second this. Pavel I understand that you prefer the Chinese transformers which is what I have. Please detail the use of the above components (C9, R130 and L21) for this configuration.