Joachim Gerhard Filter Buffer for ES9022

massimo · 2012-08-03 10:03 am

EUVL said:
Is it important whether it is 0805 or 0603 ?

No, with std pads we can fit 0805 in lieu of 0603, Just a little bit more difficult

EUVL · 2012-08-03 10:04 am

Or vice verse....

Smaller caps has higher resonance frequencies.

Patrick

EUVL · 2012-08-03 2:54 pm

People sent me PMs asking for BoM.

Since the two most critical passives are know, we'll publish the rest so that you can also organise GBs if you wish :

BoM for one PCB

4x 10R 0.5% SMD 0805 Digikey RR12Q10DCT-ND
6x 100R 0.5% SMD 0603 Digikey RR08P100DCT-ND
2x 0R SMD 0603 Digikey P0.0GCT-ND
2x 10k 0.5% SMD 0603 Digikey RR08P10.0KDCT-ND
2x 470R 0.5% SMD 0805 Digikey RR12P470DCT-ND

4x 220µF 25V Digikey P10271-ND
2x 150pF 16V PPS SMD 0603 Digikey PCF1461CT-ND

2x 18mH 5%, matched to 1% Mouser 434-02-183J

Patrick

woodturner-fran · 2012-08-05 9:18 pm

I wonder if it would be possible to get those parts from mouser? I could probably do a parts kit when I'm doing the inductors anyway?

I'll have to buy my own anyway...

Whenever you close this GB, I'll leave the inductor GB open a week longer to catch any stragglers.

Fran

korben69 · 2012-08-05 9:23 pm

Mousers Refs :
10R - 754-RR1220Q-100D
100R - 754-RR0816P-101D
0R - 667-ERJ-3GEY0R00V
10K - 754-RR0816P-103D
470R - 754-RR1220P-471D
220uF/25v - 667-EEU-FC1E221
150pF/16v - 667-ECH-U1C151JX5

Phil

EUVL · 2012-08-06 8:41 am

Running total 72.
We shall close Thursday evening.

Thanks,
Patrick

dw1narso · 2012-08-07 5:20 am

Shaman 1x EU
MisterRogers 1x USA
jean-paul 1x EU
unixdeveloper 1x USA.
buzzforb 2x USA
touchdown 1 x EU (Italia)
guglielmope 1 x EU (Italia)
SYKLAB 1x HK
pchw 2x USA
Acko 2x Australia
Dane 2x USA
GaryB 1x USA
shoom 1x EU-UK
Jolojl 1x EU-SWE
jonners 1X EU
ccliu 2x TW
jj506 4x TW
necplusultra 1x canada
leejh 3x KOR
steve jones 1x USA
Greg Stewart 1x USA
hochopeper 1x Australia
palmito 1x USA
cyteen 1x UK
vitalica 2 x EU
ryanj 1 x Australia
Cloud85 2x singapore
APK 4 x UK
CeeVee 2 X Portugal
woodturner-fran 2x EU
diy_calderon 1x USA
ginum 2x EU
JBdV 2X EU
aud1out 1x canada
tome 1x Europe (Macedonia)
schuhbu 2x EU
vanofmonks 1x USA
audionootje 1x EU
Reima 2x USA
CFT 1x HK
Lutto 4x EU
korben69 1x EU
whmok 2x Singapore
jacek_k_wawa 2x EU
grufti 2x USA
dw1narso 2x Indonesia

I'm in.... Patrick...

I've been quite long do not check DIYAudio forum..., is there still the group buy run for your ES9022 DAC? Also, would it be good if I bypass the SPDI/F receiver and feed in I2S directly from async USB-I2S converter, or do you still recommend to use the 8804 receiver first?

EUVL · 2012-08-07 5:39 am

I recommend you use I2S direct. Don't use spdif if you can avoid it.
There is no GB for the 9022 module. All individual requests.
Please send me a PM.

Patrick

APK · 2012-08-07 8:59 am

Just amended my order

Shaman 1x EU
MisterRogers 1x USA
jean-paul 1x EU
unixdeveloper 1x USA.
buzzforb 2x USA
touchdown 1 x EU (Italia)
guglielmope 1 x EU (Italia)
SYKLAB 1x HK
pchw 2x USA
Acko 2x Australia
Dane 2x USA
GaryB 1x USA
shoom 1x EU-UK
Jolojl 1x EU-SWE
jonners 1X EU
ccliu 2x TW
jj506 4x TW
necplusultra 1x canada
leejh 3x KOR
steve jones 1x USA
Greg Stewart 1x USA
hochopeper 1x Australia
palmito 1x USA
cyteen 1x UK
vitalica 2 x EU
ryanj 1 x Australia
Cloud85 2x singapore
APK 8 x UK
CeeVee 2 X Portugal
woodturner-fran 2x EU
diy_calderon 1x USA
ginum 2x EU
JBdV 2X EU
aud1out 1x canada
tome 1x Europe (Macedonia)
schuhbu 2x EU
vanofmonks 1x USA
audionootje 1x EU
Reima 2x USA
CFT 1x HK
Lutto 4x EU
korben69 1x EU
whmok 2x Singapore
jacek_k_wawa 2x EU
grufti 2x USA
dw1narso 2x Indonesia

EUVL · 2012-08-07 6:24 pm

Running total 78.

Patrick

woodturner-fran · 2012-08-07 6:38 pm

Approximate parts cost for the BOM above for 1 board (incl inductors) works out ~€6 or so. So I still need to check to see if that is incl or excl VAT (sales tax) and customs etc etc. But suffice to say the parts for 1 stereo board ain't gonna cost that much. I also need to estimate postage costs from me back out to the various countries with/without tracking. Based on past experience I'd image we are looking at ~€12-13 for the full kit for one stereo board minus tracking which usually adds €3-4.

syklab · 2012-08-07 6:57 pm

Patrick,
Any planed ETA ?

EUVL · 2012-08-07 8:06 pm

PCBs are already ordered. FETs yet to be.
Longest time is matching and sorting.
So patience.

And we have not even collected money !!!!!

Patrick

linuxfan · 2012-08-08 1:32 pm

Shaman 1x EU
MisterRogers 1x USA
jean-paul 1x EU
unixdeveloper 1x USA.
buzzforb 2x USA
touchdown 1 x EU (Italia)
guglielmope 1 x EU (Italia)
SYKLAB 1x HK
pchw 2x USA
Acko 2x Australia
Dane 2x USA
GaryB 1x USA
shoom 1x EU-UK
Jolojl 1x EU-SWE
jonners 1X EU
ccliu 2x TW
jj506 4x TW
necplusultra 1x canada
leejh 3x KOR
steve jones 1x USA
Greg Stewart 1x USA
hochopeper 1x Australia
palmito 1x USA
cyteen 1x UK
vitalica 2 x EU
ryanj 1 x Australia
Cloud85 2x singapore
APK 8 x UK
CeeVee 2 X Portugal
woodturner-fran 2x EU
diy_calderon 1x USA
ginum 2x EU
JBdV 2X EU
aud1out 1x canada
tome 1x Europe (Macedonia)
schuhbu 2x EU
vanofmonks 1x USA
audionootje 1x EU
Reima 2x USA
CFT 1x HK
Lutto 4x EU
korben69 1x EU
whmok 2x Singapore
jacek_k_wawa 2x EU
grufti 2x USA
dw1narso 2x Indonesia
linuxfan 2x Australia

Running total 80

Thanks

necplusultra · 2012-08-08 1:43 pm

Shaman 1x EU
MisterRogers 1x USA
jean-paul 1x EU
unixdeveloper 1x USA.
buzzforb 2x USA
touchdown 1 x EU (Italia)
guglielmope 1 x EU (Italia)
SYKLAB 1x HK
pchw 2x USA
Acko 2x Australia
Dane 2x USA
GaryB 1x USA
shoom 1x EU-UK
Jolojl 1x EU-SWE
jonners 1X EU
ccliu 2x TW
jj506 4x TW
necplusultra 2x canada
leejh 3x KOR
steve jones 1x USA
Greg Stewart 1x USA
hochopeper 1x Australia
palmito 1x USA
cyteen 1x UK
vitalica 2 x EU
ryanj 1 x Australia
Cloud85 2x singapore
APK 8 x UK
CeeVee 2 X Portugal
woodturner-fran 2x EU
diy_calderon 1x USA
ginum 2x EU
JBdV 2X EU
aud1out 1x canada
tome 1x Europe (Macedonia)
schuhbu 2x EU
vanofmonks 1x USA
audionootje 1x EU
Reima 2x USA
CFT 1x HK
Lutto 4x EU
korben69 1x EU
whmok 2x Singapore
jacek_k_wawa 2x EU
grufti 2x USA
dw1narso 2x Indonesia
linuxfan 2x Australia

Running total 81

Thanks

dw1narso · 2012-08-09 1:17 am

Question, is this buffer compatible and useful for the JP/Subbu ES9023+WM8804 DAC?

woodturner-fran · 2012-08-09 1:44 am

And another Q: I did look, but couldn't find the info - what is the current demand for the filter and what would you suggest for a PSU for it? Batteries or shunt, or is the PS not so critical?

EUVL · 2012-08-09 4:11 am

> Question, is this buffer compatible and useful for the JP/Subbu ES9023+WM8804 DAC

Jean Paul was the third on top of the subscribers list ??
You should ask him.

> what is the current demand for the filter and what would you suggest for a PSU for it?

About +/-9V, 24~32mA, depending on the Idss of the JFETs, for stereo.

> Batteries or shunt, or is the PS not so critical?

If you ask me, of course batteries.

Patrick

syklab · 2012-08-09 5:15 am

EUVL said:
> Question, is this buffer compatible and useful for the JP/Subbu ES9023+WM8804 DAC

Jean Paul was the third on top of the subscribers list ??
You should ask him.

> what is the current demand for the filter and what would you suggest for a PSU for it?

About +/-9V, 24~32mA, depending on the Idss of the JFETs, for stereo.

> Batteries or shunt, or is the PS not so critical?

If you ask me, of course batteries.

Patrick

Hi Patrick,

I thought Joachim's schematic had +/- 15V?

Regards

EUVL · 2012-08-09 6:08 am

The voltage is not so important, since you only swing 2.8V (line level).
So 9V min, 15V max. Max is limited by cascode JFET dissipation.
Anything in between is fine.

Patrick

Joachim Gerhard Filter Buffer for ES9022

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