Upgraded Single Board PCM1794 NOS DDDAC

[kurand]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8)
SimonJ (CCS x 2)
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts

Total CCS= 42
Parts = 20

 

[SimonJ]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8)
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts

Total CCS= 42
Parts = 22

 

[stijn001]

...

Like these little puppies? 😉

An externally hosted image should be here but it was not working when we last tested it.

These 6 measured the best of 20 I made, with the same single fixed resistor (!), between 0.399-0.400mA (i.e. 0.25% tolerance).

They are going onto the dac tonight.

 

[carlsor]

CCS SOT-23 Adaptor Board

stijn001,

Very creative use of SOT-23 adaptor boards as single resistor CCS.
You are fortunate to have so many 2SK208 JFETs with near identical characteristics.

Waiting to hear about your report on how they sound.

 

[mbcoffman]

emyeuoi (x1)
PET-240 x2 + 2 set JFETS + 2 set Susumu
Myint67x1
Juancho x2 + 2 sets JFETS + 2 sets Susumu
Stijn001 x1 + 1 set JFETS + 1 set Susumu
Sterlingmck x2 + 2 set JFETS + 2 set Susumu
BDL x1 + 1 set JFETS + 1 set Susumu
mbcoffman x1 + 1 set JFETS + 1 set Susumu
carlsor x1
naimster x2
kurand x1 + 1 set JFETS + 1 set Susumu
brettlb x1
SimonJ x1 + 1 set JFETS + 1 set Susumu
JanGr. (x1)
ed linssen x1 + 1set JFETS + 1 set Susumu
PCB= 20
Parts= 11

 

[mbcoffman]

emyeuoi (x1)
PET-240 x2 + 2 set JFETS + 2 set Susumu
Myint67x1
Juancho x2 + 2 sets JFETS + 2 sets Susumu
Stijn001 x1 + 1 set JFETS + 1 set Susumu
Sterlingmck x2 + 2 set JFETS + 2 set Susumu
BDL x1 + 1 set JFETS + 1 set Susumu
mbcoffman x1 + 1 set JFETS + 1 set Susumu
carlsor x1
naimster x2
kurand x1 + 1 set JFETS + 1 set Susumu
brettlb x1
SimonJ x1 + 1 set JFETS + 1 set Susumu
JanGr. (x1)
ed linssen x1 + 1set JFETS + 1 set Susumu
PCB= 19
Parts= 12

 

[mbcoffman]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8)
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Total CCS= 44
Parts = 24

 

[Myint67]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8)
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Myint67 (CSSx4) + parts
Total CCS= 48
Parts = 28

 

[Myint67]

emyeuoi (x1)
PET-240 x2 + 2 set JFETS + 2 set Susumu
Myint67x1+1sets JFETS + 1set susumu
Juancho x2 + 2 sets JFETS + 2 sets Susumu
Stijn001 x1 + 1 set JFETS + 1 set Susumu
Sterlingmck x2 + 2 set JFETS + 2 set Susumu
BDL x1 + 1 set JFETS + 1 set Susumu
mbcoffman x1 + 1 set JFETS + 1 set Susumu
carlsor x1
naimster x2
kurand x1 + 1 set JFETS + 1 set Susumu
brettlb x1
SimonJ x1 + 1 set JFETS + 1 set Susumu
JanGr. (x1)
ed linssen x1 + 1set JFETS + 1 set Susumu
PCB= 19
Parts= 13

 

[mk57]

please add " parts" to my order

 

[emyeuoi]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8) + parts
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Myint67 (CSSx4) + parts
Total CCS= 48
Parts = 36

 

[emyeuoi]

CCS Circuit PCB - UPDATE

Dear All,

carlsor kindly highlight to me that the 2SK208, as per datasheet, need to be flipped.

Thanks carlsor to catch it 🙂

Attached the new layout of the CCS circuit.

Tomorrow I will close the GB and in few days I will send you a PM with the final amount including handling/shipping. Please reply to the PM with your paypal account and the exact shipping address.

Thanks and Happy New Years to all of you and your families.

Enrico

 

[pdb]

Question: Could the buffer with psu's and a volume pot be used as a simple preamp with no gain? If yes, what would be the prefered impedance for the pot? Thanks. Per

 

[Myint67]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8)
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Myint67 (CSSx2) + parts
Total CCS= 46
Parts = 26 /QUOTE]

 

[stijn001]

..

Waiting to hear about your report on how they sound.

I've posted a first impression update on the CCS's, in a 4 board DDDAC, over at the Original DDDAC thread. I feel that's where it belongs as most of the development colleboration was done by the people subscribed there.

(spoiler: I'm very impressed!) 🙂🙂🙂

http://www.diyaudio.com/forums/digi...pcm1794-waveio-usb-input-373.html#post4172935

 

[ed linssen]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8) + parts
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Myint67 (CSSx4) + parts
Total CCS= 48
Parts = 36

 

[tuyen]

emyeuoi (x1)
PET-240 x2 + 2 set JFETS + 2 set Susumu
Myint67x1+1sets JFETS + 1set susumu
Juancho x2 + 2 sets JFETS + 2 sets Susumu
Stijn001 x1 + 1 set JFETS + 1 set Susumu
Sterlingmck x2 + 2 set JFETS + 2 set Susumu
BDL x1 + 1 set JFETS + 1 set Susumu
mbcoffman x1 + 1 set JFETS + 1 set Susumu
carlsor x1
naimster x2
kurand x1 + 1 set JFETS + 1 set Susumu
brettlb x1
SimonJ x1 + 1 set JFETS + 1 set Susumu
JanGr. (x1)
ed linssen x1 + 1set JFETS + 1 set Susumu
tuyen x1 + 1 set JFETS + 1 set susumu

PCB= 20
Parts= 14

 

[tuyen]

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8) + parts
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Myint67 (CSSx4) + parts
tuyen (CCS x 8) + parts

Total CCS= 56
Parts = 44

 

[Myint67]

Update

emyeuoi (CCS x 2)
carlsor (CCS x 4)
juancho (CCS x 4)
crazyfrog (CCS x2)
mk57 (CCS x 8) + parts
SimonJ (CCS x 2) + parts
PET-240 CCS x 4 + parts
sterlingmck (CCS x 4) + parts
zz1969 (CCS x 8) + parts
kurand (CCS x 4) + parts
mbcoffman (CCS x 2) + parts
Myint67 (CSSx2)+ parts
tuyen (CCS x 8) + parts

Total CCS= 54
Parts = 42

 

[stijn001]

emyeuoi (x1)
PET-240 x2 + 2 set JFETS + 2 set Susumu
Myint67x1+1sets JFETS + 1set susumu
Juancho x2 + 2 sets JFETS + 2 sets Susumu
Sterlingmck x2 + 2 set JFETS + 2 set Susumu
BDL x1 + 1 set JFETS + 1 set Susumu
mbcoffman x1 + 1 set JFETS + 1 set Susumu
carlsor x1
naimster x2
kurand x1 + 1 set JFETS + 1 set Susumu
brettlb x1
SimonJ x1 + 1 set JFETS + 1 set Susumu
JanGr. (x1)
ed linssen x1 + 1set JFETS + 1 set Susumu
tuyen x1 + 1 set JFETS + 1 set susumu

PCB= 19
Parts= 13