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Joachim Gerhard Filter Buffer for ES9022

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S

Stephanlj

Member
Joined 2005
tagheuer said:
Just before it gets lost in all the Batch 1 responses :

Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 1x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany

Running total 40.
Min. 50 before we shall start a batch 2.


Patrick
Click to expand...
 
EUVL

EUVL

Member
Joined 2003
xen-audio.com
Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 1x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany

Running total 42.
 
EUVL

EUVL

Member
Joined 2003
xen-audio.com
The BF862 are cascoded and see about 5V Vds. So the rail voltage has little effect on its performance.
Since it is meant for the DAC output, you are unlikely to see more than 4V output swing.
Add another 6V headroom for the J111 to operate properly, you have Joachim's 15V.

The BF862s are mostly under 20mA each. So 40mA will be sufficient for 1 PCB.


Patrick
 
A

acko

Member
Joined 2008
sites.google.com/site/ackodac/home
Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 1x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany
Acko x4 Australia

Running total 46.
 
J

j45yip

Member
Joined 2004
Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 1x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany
Acko x4 Australia
j45yip x1 Singapore

Running total 47.
 
Stixx

Stixx

Member
Joined 2003
original-ton.net
Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 2x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany
Acko x4 Australia
j45yip x1 Singapore

Running total 48.

Edited my number...only two missing now ;)
 
S

shoom

Member
Joined 2010
Hi All

And after a longer listening my 9023 with Filter buffer is just sounding superb.:)

It just amazes me how good the 9023 can sound for so little £$.and with the buffer added it’s an even better sweeter and punchier sound soooooo.

Can I have another please?:D

Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 2x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany
Acko x4 Australia
j45yip x1 Singapore
shoom x1 UK

Running total 49.
Thanks again for the great work and sorry to WK for more Jfet matching and soldering.
 
S

swalter

Member
Joined 2012
Happy New Year everyone!!!

Reading all those positive feedback makes me want one as soon as possible as well :D

Now that the minimum quantity of 50 for the second batch is almost reached, anyone from the second run interested in a GB for the matched inductors and remaining parts?

Stefan
 
EUVL

EUVL

Member
Joined 2003
xen-audio.com
Please help us to help you by copying the list in post #353 and add your details to it.
Including the running total please.

I encourage you to organise your own GB for the other parts including the inductors.
It saves you money, and save us work that we don't particularly need.


Thank you for your interest,
Patrick
 
Last edited:
A

atupi

Member
Joined 2010
Phisci x8 South Africa
hirez69 x6 Italy
Boggy62 x2 France
Swalter 3x Switzerland
CFT 1x HK
tubo 2x USA
Ryssen 1x Sweden
number9 1X USA
BDL x1 Romania
rsotirov2X Canada
supra 1X Australia
syyma x1 USA
wirewiggler x2 USA
Roman M x1 Russia
Stixx 2x Germany
Malvin x1 USA
merlin2069er x1 Canada
potepuh x2 Slovenia
Blitz x2 Germany
Tagheuer x1 Canada
Stephanlj x2 Germany
Acko x4 Australia
j45yip x1 Singapore
shoom x1 UK
atupi. X1 Romania
 
S

swalter

Member
Joined 2012
Ok, did a bit of spreadsheet fiddling and parts sourcing. ;)
The BOM used is the one from post #301 in this thread and added the 18K7 for V3.1 as well (post #303) so both versions can be build.

Prices are the current ones from Mouser, with some volume discounts a pair of inductors will be 2.70 CHF and the parts kit (containing one pcs extra for all SMD components) will be 2.70 CHF as well.
Shipping prices will depend on weight, so will get this checked later on, but maybe Fran can give me a number to calculate with.

GB Spreadsheet can be found here or in my signature

Stefan

PS: would be nice if Patrick or WK could look over the BOM quickly to double check
 
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