Had a good evening! Got the C2 on board and modded it to remove additional inverter as its not needed for the servo (independant clocks as std). Connected master and servo clocks . Waiting on few bits from Lee so I can do the /8 word clock.
Got 820uF Nichicon Solid polymer on all digital rails (same as SEPC) and ZA's on all the analogue rails except DOS which already had Black Gates on the board.
Quite a few other bits already in this player from last time I played. Sounds good on the workshop system, so i'm gonna hook it up to the main for a test and crack open another beer!!! CHeers!!!
Got 820uF Nichicon Solid polymer on all digital rails (same as SEPC) and ZA's on all the analogue rails except DOS which already had Black Gates on the board.
Quite a few other bits already in this player from last time I played. Sounds good on the workshop system, so i'm gonna hook it up to the main for a test and crack open another beer!!! CHeers!!!
Considering its all running off the std SE transformer and there are no decent regs in there, i'm pretty impressed! Funny what a load of well chosen caps a clock and a dos can do!!!!
I think the mods I made to my amp and the fact that I've just attenuated about 1db off the tweeter mean that the general character of this player better suits my system than the last time I was messing about with them. I can definitely hear the potential!! TX's in tomorrow and poss a couple of regs!
I think the mods I made to my amp and the fact that I've just attenuated about 1db off the tweeter mean that the general character of this player better suits my system than the last time I was messing about with them. I can definitely hear the potential!! TX's in tomorrow and poss a couple of regs!
Who will be the first to have a 1F system?!
I did it long ago.
I had more than 1F after the main 5v reg in my CDP.... It improved bass but gave a somehow blured presentation.
No... it came from the USA I still have those if anyone needs some 🙂
I used one big can 500.000uF // another 500.000uF supercap (used for computer backup)
I used one big can 500.000uF // another 500.000uF supercap (used for computer backup)
Well they do say to only use smaller caps after a regulator. I'd say huge before the regs is good though.
That was my initial mistake I guess.
But it gave lots of woomph at the time.
Now I am using 10.000uF and am very pleased with the results.... And I have no outboard caps.
It safer also... I remenber I had to change the fuses to 3A because they kept blowing at turn on... (The 3A did not fuse bug glowed like lamps at turn on).
At power off, the disc started to spin at very high speed with audible whizz noise until the big caps totally uncharged 🙂
But it gave lots of woomph at the time.
Now I am using 10.000uF and am very pleased with the results.... And I have no outboard caps.
It safer also... I remenber I had to change the fuses to 3A because they kept blowing at turn on... (The 3A did not fuse bug glowed like lamps at turn on).
At power off, the disc started to spin at very high speed with audible whizz noise until the big caps totally uncharged 🙂
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Hi,
Changed the main 12v smoothing from 6800u to 10,000u bypassed with 10u and 100n.
Replaced BGs on the dac digital and clock with oscon sepc.
Repositioned 3 superregs for the dac from a seperate board to nearer to the chip.
Moved an spower from the main 5v reg to the servo decoder feed only.
Dos is getting run in now as well.
All sounding very nice now.
Regards
Pete
Changed the main 12v smoothing from 6800u to 10,000u bypassed with 10u and 100n.
Replaced BGs on the dac digital and clock with oscon sepc.
Repositioned 3 superregs for the dac from a seperate board to nearer to the chip.
Moved an spower from the main 5v reg to the servo decoder feed only.
Dos is getting run in now as well.
All sounding very nice now.
Regards
Pete
Attachments
Nice work Pete.
When I had my cd67, I got a small improvement by running coax for the i2s between decoder and dac. It's pretty easy to do on that player as there're three resistors at the decoder and three links at the dac.
Lee.
When I had my cd67, I got a small improvement by running coax for the i2s between decoder and dac. It's pretty easy to do on that player as there're three resistors at the decoder and three links at the dac.
Lee.
Any info for a next big mod for my 63 done a clock ,regs on dac servo and cpu ,My soldering irons getting bored.
cheers alan
cheers alan
Had a night playing clapton reasonable volume not?.got two wks while the other halfs away make some inprovements.
lol alan
lol alan
Alan, I think you're in need of a low-noise reg or two now to take it that step further.
Or regulate the driver IC's
Lee.
Or regulate the driver IC's
Lee.
My mate brought a cd 4000 round sat nite for a play off he Lost?. just about matched my ki, My se was streets ahead.
alan
alan