This is the 100th time I put the S1 in my player and I don't like it.
I don't know about that,but there is very little diffrance on my GC when I switch the speaker ends.
Thanks.
The non-os sound always seems to me dirty and cloudy.
Some chaos is getting into the music.It is better in some respects,but can't listen to it,makes me tired.
Maybe I will try with separate DAC.
Bartek
zygibajt said:
Hello Bartek, I have CD65DX as well but I never looked into the differences as its only purpose is to be a spare cdplayer.
I think your mod is to fit CDM2 motor in CD65, isn't it ? Heard of that before but I never did that. How do you connect motor control to the mainboard of CDM4 based cdplayers ?
Sorry, I don't have the schematics, I use one of the Philips sister models.
Jean-Paul
I got some new ones and tried them directly on TDA1543 DAC and they didn't sound bad. I actually preferred them to Panasonic HQF and Rubycone (Z?). They sound somewhat mellow, but don't present the brightness other electrolytics posses. Also, Nichicon Gold had similar, laid back characteristic.
Peter Daniel said:
Do you think that electrolytics as decoupling caps give more brightness ???
I was thinking because of loss of capacity @ high frequency they should sound darker, compared to foil.
My CD880 still got a very small amount of brightness that I do not like. In any case I believe that. It is very difficult to say, but when I change to the CD304, I got the impression that it is a little darker and highs are little bit smoother, and it is always right.
I just put a socket for the 1541 in the CD304 and will try S1.
The CD304 got 14 smd chip caps for the 1541...
chlo said:
No, I meant 1µF MKP for decoupling of the opamps.
I have already 1µF MKP for the for the -15V supply and the 14 decoupling caps of the 1541.
+/-5V is still Cerafine.
Also there are another 7 Cerafines on board which I believe are also connected to the 15V rails and might be decoupling of the volume control ceramic board. So if Cerafine spoils sound they might still do.
I like to try the 1µF MKP also for the 5V supply pins of the 1541.
It is very hard to solder if parts are connected to the groundplane.
It may be worthwile to experiment with different caps types, as I found that in even in digital supply capacitors swapping makes a difference. And some electrolytics are more bright and harsh than others. IME, Nichicon Gold and Cerafines were less bright sounding than other types. I found Sprague Extralytics especially bright, quite a disappointment as I always thought about them as a premium grade.
Just draw a schematic of the CD880 output stage from the pcb and I found a strange transistor 2N4859.
Any idea what it is for ?
There is 1,5kohm in the feedback loop of the I/V converter opamp.
Parallel is / should be 5,6nF.
Now they put the BE junction of the 2N4859 in series with that 5,6nF cap.
C of 2N4859 is connected via 4,7Mohm / 100kohm in series to V+.
From where 4,7Mohm / 100kohm are tied together, it goes another 4,7Mohm to the other channel.
Any idea what it is for ?
There is 1,5kohm in the feedback loop of the I/V converter opamp.
Parallel is / should be 5,6nF.
Now they put the BE junction of the 2N4859 in series with that 5,6nF cap.
C of 2N4859 is connected via 4,7Mohm / 100kohm in series to V+.
From where 4,7Mohm / 100kohm are tied together, it goes another 4,7Mohm to the other channel.
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