Upgraded Single Board PCM1794 NOS DDDAC

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#343
emyeuoi said:
Hi Paul,

Happy to know that you guys are receiving the boards 🙂

Attached are few pictures that should help you to understand the connections of the half clock delay.

To build mine I do the following steps:

- Allocate the 1/2 clock board in the top of the mother board (better with some paper tape) and mark the 9 small holes.
- Marked in the mother boards the holes as per 1/2 clock PCB (like D7, D7.5, D39 etc...)
- Soldered the 9 piece of wires into the 1/2 clock board (better with different colors).
- Inserted the cables in the holes and fixed the 1/2 board with a small bi-adesive tape.
- Revert the mother boards and make the connection as per schematic (in the pictures you can see clearly the traces that have to be cut and where the wires should be soldered)

I hope this can help you but let me know...

Regards,
Enrico
Click to expand...

Hi Enrico,

thanks a lot for the pictures, that helps a lot. Two questions:
1. I see that one yellow cable has at one site where it comes out of the board 39,5 and on the end 39. Which is the correct value?

2. I have a 4 deck. Do I need to replace all the data 1K resistors to 100 Ohm or is there a trick to avoid this operation?

Paul
 
#344
pz1 said:
Hi Enrico,

thanks a lot for the pictures, that helps a lot. Two questions:
1. I see that one yellow cable has at one site where it comes out of the board 39,5 and on the end 39. Which is the correct value?

2. I have a 4 deck. Do I need to replace all the data 1K resistors to 100 Ohm or is there a trick to avoid this operation?

Paul
Click to expand...

Hi Paul,

1 - I mark with 39 and 7 the traces that I need to cut. The yellow cable is the 39,5.

2 - I don't have any trick 🙁
 
#347
GB SMD Parts Status

All SMD parts shipped. I don't ever plan to test and sort 700 JFETs again.

I am looking forward to reading about the positive results from the completed CCS boards, buffer boards, and Susumu Rload resistors. I am still waiting to receive my GB boards.

Carlsor
 
Last edited:
#349
carlsor said:
All SMD parts shipped. I don't ever plan to test and sort 700 JFETs again.

I am looking forward to reading about the positive results from the completed CCS boards, buffer boards, and Susumu Rload resistors. I am still waiting to receive my GB boards.

Carlsor
Click to expand...

700 JFET tested and sorted!😱 My congrats!!!

I hope you get the boards soon...

Regards,
Enrico
 
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