I have a Marantz SE version which uses the same main board.
All the PSU and bypass caps were Elna Cerafine and the DAC was the TDA1541 S
It sounds completely different to the 'standard' Philips board - more open with loads more detail.
Doing simple things like changing the phono sockets also helps.
Andy
All the PSU and bypass caps were Elna Cerafine and the DAC was the TDA1541 S
It sounds completely different to the 'standard' Philips board - more open with loads more detail.
Doing simple things like changing the phono sockets also helps.
Andy
Yes, upgrade to 1541A at least. I have both SAA7220P/A and /B, and the difference is subtle. So I suspect the difference is in the DAC.
However, there would be some minor mods required (unless the board was made upwards compatible). You'll need a 470pF cap across (I think, check the datasheet) pins 16 and 17, and I think the inputs are slightly different (I think the non-A has a SYS CLK input to it, whereas its missing on the A version) I could be wrong on that last fact, so check the datasheets of the two chips.
Then, you'll be able to upgrade to a TDA1541A S2 double crown, and let me know if its worth it
But seriously, it would be a worthy upgrade, and fairly cheap to do.
And, I think you should be able to get the detail out of the DAC chip.
Cheers,
Phil
However, there would be some minor mods required (unless the board was made upwards compatible). You'll need a 470pF cap across (I think, check the datasheet) pins 16 and 17, and I think the inputs are slightly different (I think the non-A has a SYS CLK input to it, whereas its missing on the A version) I could be wrong on that last fact, so check the datasheets of the two chips.
Then, you'll be able to upgrade to a TDA1541A S2 double crown, and let me know if its worth it
But seriously, it would be a worthy upgrade, and fairly cheap to do.
And, I think you should be able to get the detail out of the DAC chip.
Cheers,
Phil
The cd 650 is a sort of combination of different other types. Decoder board i have also in a magnavox. Servo board is as 640/660. Nice you have a remote receiver in it. It has a cdm4, isn't it? The belt has often to be replaced
I just got the parts for a double shunt ps for 7210/7220. Wil build this shunt:
(Rudolf Meyers schematic) : http://home.hccnet.nl/r.r.meijer/cdd.html
Yesterday i solved the clock remains issues on my CD880. I fitted a Tent clock with a Flee PS. It has to build in nicely though. Will isolate the separate I/V board and the clock with copper or metal.
I just got the parts for a double shunt ps for 7210/7220. Wil build this shunt:
An externally hosted image should be here but it was not working when we last tested it.
(Rudolf Meyers schematic) : http://home.hccnet.nl/r.r.meijer/cdd.html
Yesterday i solved the clock remains issues on my CD880. I fitted a Tent clock with a Flee PS. It has to build in nicely though. Will isolate the separate I/V board and the clock with copper or metal.
Evening folks,
I've been at it. I've just done the following:
* Glued 3 wooden cones to chassis
* Stuck bitumen damping on lid
* Changed main PSU diodes to schottky (+removed bypass SMDs)
* Changed op-amps for turned pin sockets & LM4562 op-amps
* Changed (x4) opa decouplers for 220/35 Rubycon ZA
* Reinstated DC blocking caps (Mundorf MKP 3.3uF)
* Bypassed output resistors and muting (no loud noises!)
I'll state the obvious about sonics - totally opened the sound up, and it has got a touch brighter sounding. I'll comment more when I've let it warm up and settle down.
I'd say it's approaching "high-end" already. Some proper regulators and a new clock should get us somewhere very pleasing. I have some Sercal S Powers and Audiocom Super Regulators to drop in.
I took some pics if anyone's interested.
Simon
I've been at it. I've just done the following:
* Glued 3 wooden cones to chassis
* Stuck bitumen damping on lid
* Changed main PSU diodes to schottky (+removed bypass SMDs)
* Changed op-amps for turned pin sockets & LM4562 op-amps
* Changed (x4) opa decouplers for 220/35 Rubycon ZA
* Reinstated DC blocking caps (Mundorf MKP 3.3uF)
* Bypassed output resistors and muting (no loud noises!)
I'll state the obvious about sonics - totally opened the sound up, and it has got a touch brighter sounding. I'll comment more when I've let it warm up and settle down.
I'd say it's approaching "high-end" already. Some proper regulators and a new clock should get us somewhere very pleasing. I have some Sercal S Powers and Audiocom Super Regulators to drop in.
I took some pics if anyone's interested.
Simon
- That's possibly you still on a high after the excitement of hearing your latest mods, BUT, after the CD63 I was also surprised how well TDA1514a sounds with so few mods.
My DAC (I think) sounds great, and its just made on stripboard, which surprises me. I doubt I'd get as promising results from scratchbuilding an SM5842 DAC on stripboard.
philpoole said:
Hi Phil,
Yep, I posted soon after doing mods so was very excited (never done so much at once and had a player still work before). Perhaps I'm confusing "high end" for "makes music"
The high-end detail retrieval and clarity are still nowhere to be seen, but what did we expect after £30+ of parts swaps and mechanical tweeks?
I'll see if I can afford a clock shortly and, if not, I'll at least get the SAA chip regulated separately.
Once again though, the sound is wonderful. It's not shut in and dull like the stock player, but provides a pleasing and informative account of the recording. Top end detail is the main thing slightly lacking now.
But keep in mind my reference point is a Marantz CD63KI with about £400 spent on it (6 low noise regulators, extra supplies, discrete output section, two clocks etc.) With some of those parts fed into this I suspect it could start to approach the same detail and clarity of that machine, but with more character and bass (1541 sound).
Simon
tubee said:
Thanks
I love the 4562, as much as anyone can love an op-amp. Compared to my also-favoured OPA2134 or OPA627BP the sound is more open and detailed. I have A-B'd a player using 4562 against one using a discrete FET stage and the 4562 had the same sonic character, essentially. It didn't have the same bass-weight or dynamics and you can pick which player is which (blindly I might add) from these traits alone. As for graph-boy rubbish like NE5532, the harsh and nasty OPA2604 or gritty LM6172 - it smokes 'em! (tests done as pre-amp and output of CD63KI)
I would love to know what you did with your cabinet tubee!
Simon
Well, i did nothing with the original cabinet. Yes scavenged parts off it
Encouraged by Simons cd650's mod i have pulled my never ending stuff also from the attic.
This is how my workbench looks like right now:
Diy cdp with cd660 pcb's, removed 7220/1541, modded cdm2 (lead on cdm, pre-amp pcb underneath cdm, cdm base in rubber stand-offs, clamp dampened)
Experimental PCM56 non-os dacs with I2S glue logic, passive I/V and Sovtek 6922 tube buffer, Tent XO on Flea ps with NE5531 reg. opamp.
Case is made from different sizes MDF, inner lined with 2mm non-ROHS plumbum and bottom plate is 5mm thick acryllic sheet. Stands on rubber-isolated feet, with an O-ring as groundplate. Top plate is U shaped and fits exactly between the veneered MDF sidepanels
But unfortunately i have a huge hum with the music. Should buy a decent HT x-former.
Encouraged by Simons cd650's mod i have pulled my never ending stuff also from the attic.
This is how my workbench looks like right now:
An externally hosted image should be here but it was not working when we last tested it.
Diy cdp with cd660 pcb's, removed 7220/1541, modded cdm2 (lead on cdm, pre-amp pcb underneath cdm, cdm base in rubber stand-offs, clamp dampened)
Experimental PCM56 non-os dacs with I2S glue logic, passive I/V and Sovtek 6922 tube buffer, Tent XO on Flea ps with NE5531 reg. opamp.
Case is made from different sizes MDF, inner lined with 2mm non-ROHS plumbum
and bottom plate is 5mm thick acryllic sheet. Stands on rubber-isolated feet, with an O-ring as groundplate. Top plate is U shaped and fits exactly between the veneered MDF sidepanels An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
But unfortunately i have a huge hum with the music. Should buy a decent HT x-former.
Tubee, looks like you've had fun.
Has there been any acoustic benefit from rehousing it?
I suppose it will be deadened by the woodwork.
I've had a bit of hum recently on my setup, but I think its mainly earthing problems.
Do you prefer the PCM56 to the TDA1541? I'm thinking of one day upgrading to PCM63 (if I can ever find two cheap enough).
Oooh, I'm dragging this off thread already (sorry).
Has there been any acoustic benefit from rehousing it?
I suppose it will be deadened by the woodwork.
I've had a bit of hum recently on my setup, but I think its mainly earthing problems.
Do you prefer the PCM56 to the TDA1541? I'm thinking of one day upgrading to PCM63 (if I can ever find two cheap enough).
Oooh, I'm dragging this off thread already (sorry).