Simon, can i borrow your hampster please? I just won a cd50 on ebay!
prob try NOS on it! 😉
PS in Donny! might pop in to see Brent tomorrow if I get time!
prob try NOS on it! 😉
PS in Donny! might pop in to see Brent tomorrow if I get time!
Cilla black on laughing gas?!
Is this a good idea Ian?
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.
Is this a good idea Ian?
Very disturbing indeed. She needs that bottle in her mouth to muffle those awful noises she makes 
Brent
Brent
Ian, the CD50 has a galvanised steel bottom...you'll need a heavy duty hamster! Assuming you meant the Marantz...
As for Cilla, there's a fair bit o' china in that gob, isn't there?!!
Stuey
As for Cilla, there's a fair bit o' china in that gob, isn't there?!!
Stuey
lol, that's exactly why she needs a regular supply of CD player chassis parts - it stops them growing too big.
Simon
Simon
I just thought I'd post an update as I know Simon and Ian are both waiting for my findings on the C2 clock I installed last night.
Well the first thing I have to say is "whoa, where the hell did that soundstage come from?" Separation of instruments and tiny nuances, tonal detail, and a massive soundstage are all very much improved. It seems to have improved dynamics too as have all the clock mods so far.
It really is a very good upgrade indeed over my original setup, which was a C1 clock and separate divide cct for pin2.
Will soon have a play with the dac decoupling caps and DEM reclocking, but I may leave these until I've built my off-board PSU transformer case. It's hard when you don't have the original tx to power your cdp, lol.
Cheers, Lee.
Well the first thing I have to say is "whoa, where the hell did that soundstage come from?" Separation of instruments and tiny nuances, tonal detail, and a massive soundstage are all very much improved. It seems to have improved dynamics too as have all the clock mods so far.
It really is a very good upgrade indeed over my original setup, which was a C1 clock and separate divide cct for pin2.
Will soon have a play with the dac decoupling caps and DEM reclocking, but I may leave these until I've built my off-board PSU transformer case. It's hard when you don't have the original tx to power your cdp, lol.
Cheers, Lee.
SimontY said:Let's have some pics of this CD50 when you have it Ian - inside and out please!
Hi Simon,
Lost will to live on Friday (see 63 thread!)
I did however, take a few pics od the std cd50 then make a few basic mods! Opamps (4562's) and half a dozen decoupling caps (only changed to cerefine robbed from the verious players if messed with) and OpAmp psu R's removed. Also the variableoutput board just unplugs (Genius!) so thats gone!
Sounds ok considering it cost me £4.99, £10 for the OpAmps and nothing for the caps! Its nicely detailed at the top but very "munged" in the mids and the bass is wooley (but then I'm now in the "Fussy" bregade, spoiled by my 960!). It would however be a great play for someone in the 2-£400 (which is pretty good for a £15 investment!) I think everything I have found is pretty much normal for a TDA1541 based player in almost std form.
Pics to follow (yes the steel base plate does compltely expose the undeside of the pcb as pointed out by Stuey!) Cilla could def do with Knoring some of the upper cross bracing! You'll see what I mean in the pics!!!!
As for the C2, I'm gagging for 1 but I need to make a decision about my player as well!!!!!!!!!! (if the tda1547 uses 16Mhz, i'll almost cetainly have one come payday!)
Ian
Ahh, it sounds like you're going CD player loopy Ian!! Looking forward to pics, and to what you do about 1541 vs 1547. Have you searched on the forum much regarding the differences?
Owing to poverty I've decided to hold off on the C2 for the moment and just assuage my upgrade thirst with another S Power, a -15V version for my DAC. That'll be low-noise reg #7 in this CD650.
Simon
Owing to poverty I've decided to hold off on the C2 for the moment and just assuage my upgrade thirst with another S Power, a -15V version for my DAC. That'll be low-noise reg #7 in this CD650.
Simon
There's very little info regarding 1547 dacs. Most people seem to have dismissed it because of the built in opamps (opa2134 or similar). You can bypass these tho, which may or may not turn it into a fantastic dac.
I'm very much torn and unsure of what to do. My cd94 has reached such a level that it's going to take a serious off-board psu for the servo section. These old chips/mechs are v greedy for power aren't they?
Edit: I have a 50va tx supplying +/-12v to the servo and it's loaded up!
Cheers, Lee.
I'm very much torn and unsure of what to do. My cd94 has reached such a level that it's going to take a serious off-board psu for the servo section. These old chips/mechs are v greedy for power aren't they?
Edit: I have a 50va tx supplying +/-12v to the servo and it's loaded up!
Cheers, Lee.
The reason most dismiss the TDA1547 is because it's not a one-stop solution. It *needs* the SAA7350, because the 1547 is only the converter, does not contain any digital filter, and the complementary chip provides the required bitstream input. You cannot use the 1547 on its own - have a read of the datasheet, it's interesting.
This chip is also capable of superlative performance. Take a look at the DPA PDM2 - which put the 7350 and 1547 in separate boxes, and avoideds the onboard opamps.
This chip is also capable of superlative performance. Take a look at the DPA PDM2 - which put the 7350 and 1547 in separate boxes, and avoideds the onboard opamps.
Ian
If you bought a C2 for your Philips I would send you a 16.9Mhz oscillator to swap over at a later date if required 😉
Brent
If you bought a C2 for your Philips I would send you a 16.9Mhz oscillator to swap over at a later date if required 😉
Brent
martin clark said:
Does this mean It could work as a replacement to the TDA1541? i.e. with the 7210/7220 combo? Or even the other way round? Is it the decoded and filter combo thats holding back the 1541???? mmmm??? 😕
rowemeister said:
TY! I know I want one!!!!
NO you can't use the 1547 with anything other than a defined serial one-bit data input stream - ie the SAA7350. The 7350 is a fine-souding dac in it's own right, but you can view the 1547 as a kind of upgraded DAC for the 7350...
martin clark said:
I think you meant this:
http://www.acoustica.org.uk/DPA/deltec.html
You really should move away from frames, they're so 1990s!
Simon
martin clark said:
So the SAA7350 is the Digital DAC and the 1547 is the analogue DAC? What sort of connection exists between them? The reason I ask is that my CD850mkII has a 7350. I was wondering about how I could add a TDA1547!
Now Thats full circle! CD850MKII -> CD67 -> CD63 -> CD960 (CD94) -> back to cd850?????
There is always my 1541 external DAC for the S2!!!
Learn't loads on the way tho'!!!
Yebbut they work well enough for me. If I redid it now I'd go back to single static pages set in Courier New 😉
UV - read the datasheets for both. You'd essentially end up with a serial data bus running between the chips.
PS. I have several DPA dacs and matching transport, I mostly prefer to use my modded 1541-based player though 😉