Andy thanks but no need for an extra cdm, I've screwed a chassis screw in a adjustable resistor which I just have to tune back (have to find 400mv on a playing CD...).
SimontY said:10mm^2 wire from star earth to post, excessive maybe
I had to isolate the post from the chassis with plastic salvaged from packaging, so as to not mess up my carefully considered grounding scheme!
Two nights ago I had a nightmare session looking for the shorts between audio ground and safety earth in my preamp. One more problem sorted at least!
This Dire Straits, Live at the BBC 1978 sounds nice!
night 🙂
Simon
Nice work on the earth (see you still have the neon lol)
Glad you like the cd
Brent
Malefoda said:
Good quality mains cables and some filter plugs will do a good job. Also change the mains cable going to extension cables with better stuff.
Brent
rowemeister said:
Hehe, yep. I will gut it and install an LED inside. Maybe a UV/purple one at the front too.
rowemeister said:
And if you feel competent to do it you want to install a dedicated ring for your listening room, using very thick wire.
I live in a rented house so I can't really do this
Simon
Hi Avr300,
I like the sound of them to and there not expensive, did you matched them?😀
Ray,
I have changed C805, C806 from 4700uF/25V no name to 470/16V BG and i finally have found the sound i'm looking for.
Please try this aswell and give me your opinion, i have now a grunding deep bass without the high mid wich was killing my soundstage.
I still cannot believe that a capacitor 10 times smaller can outperform its bigger brother like this, but my ears are telling me so!!
Peter
I like the sound of them to and there not expensive, did you matched them?😀
Ray,
I have changed C805, C806 from 4700uF/25V no name to 470/16V BG and i finally have found the sound i'm looking for.
Please try this aswell and give me your opinion, i have now a grunding deep bass without the high mid wich was killing my soundstage.
I still cannot believe that a capacitor 10 times smaller can outperform its bigger brother like this, but my ears are telling me so!!
Peter
Attachments
Malefoda said:
😀Sorry, couldn't resist, Matthieu...
I hope the player is going to be fine. You must have some sleepless nights over it.
As far as the blocking caps, I think BG is a good choice. Brent used the speaker cross-over ones and they seem to work very good. But the standard ones also give good results. Or use the 100u/6.3V Nx, very nice
.Peter Venema said:
Hi Peter,
It's not just the value in uF, but also the quality of the cap that matters 😀. You replaced a mediocre cap by a superb one. Even though that one is much smaller, it performs much better. If you compare a 100u/16V BG with a 100u/16V standard brand one, or even a ZLH or FC, you'll see that the BG is a lot bigger in size = lower ESR. And there are reports that big caps around the DAC and opamps, like 1000u, also don't sound good. Most of the times I use 220...470u in those places. I see you moved the regs near the opamps? Good to hear you found it 😎.
Ray.
Ray,
Did you get the cd-67mk2 Ose already?😉 😀
Yes the quality of the BG is very good indeed,
i will try C803 and C804 in BG for sure see what the impact is.
Did more mods from your list and the 67mkII is starting to let me hear the potential of my hifi set.
Peter
Did you get the cd-67mk2 Ose already?😉 😀
Yes the quality of the BG is very good indeed,
i will try C803 and C804 in BG for sure see what the impact is.
Did more mods from your list and the 67mkII is starting to let me hear the potential of my hifi set.
Peter
Peter Venema said:
You're right, they cost next to nothing.
No, I just bought them and soldered them in. Mayby I'll do it later, but I wanted to hear the sound first. And they do sounds nice.
Ray
Yes, I moved the regs to Hdam👎 area and it gave a better controled bass because its nearer to the opamps.
I also placed a reg for analoge suppply for the DAC.
The smal print above the decoder is a tent crystal with elso kwak power supply, reclocking gave a BIIIIG differance in the overal sound and soundstage.
Did you try a dedicated 5V reg for the laserprint, because every additional HF hash will cause the trackingdevice more work to focus and the fault correction to correct these errors ergo more distortion, this is offcourse in theory.
I will try this, and let you know what it brougt for the sound.
Peter
Yes, I moved the regs to Hdam👎 area and it gave a better controled bass because its nearer to the opamps.
I also placed a reg for analoge suppply for the DAC.
The smal print above the decoder is a tent crystal with elso kwak power supply, reclocking gave a BIIIIG differance in the overal sound and soundstage.
Did you try a dedicated 5V reg for the laserprint, because every additional HF hash will cause the trackingdevice more work to focus and the fault correction to correct these errors ergo more distortion, this is offcourse in theory.
I will try this, and let you know what it brougt for the sound.
Peter
Avr300
The 1000pF to 470pF mod gave a better balanced high to low and a more natural sound for me.😀 😀
Is this the case for you aswell?
Peter
The 1000pF to 470pF mod gave a better balanced high to low and a more natural sound for me.😀 😀
Is this the case for you aswell?
Peter
I did the same, 1n to 470p.
It's still to early to judge, but indeed it's a very pleasant and present sound I have (now?).
It's still to early to judge, but indeed it's a very pleasant and present sound I have (now?).
Mornin Fellows,
what about that ??
https://secure3.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=4296710
what about that ??
https://secure3.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=4296710
Peter Venema said:
I can believe it! I reported just the same result from 4700u Pana Fc to 470u and 330u BG in key locations. I use 1000u BG next to op-amps, which works well too.
I just popped 220u Cerafine in my preamp (maybe nice to mix caps a bit?) post-regs. There's 20,000uF before the regs.
OT: if anyone's made an extremely simple single gain stage preamp with one dual op-amp, please let me know about it, because I'm going to make one, with point-to-point wiring. I plan on feeding at least two active x-overs with it.
Simon
SimontY said:
Yes they work well there , you actually have little more capacitance than using 4x 470uF caps by using 2X 1000uF.
470uF X 2 = 940uF per 12V rail
Where you have 1000uF X1 per 12v rail
Brent
Absolutet capacitance value is very poorly controlled for electrolytics; typical tolerance is -20, +50%.
In other words don't worry about the uF much...better to base your choice on desired ESR and ESL characteristics if you can define them.
In other words don't worry about the uF much...better to base your choice on desired ESR and ESL characteristics if you can define them.
6h5c said:
Have you seen the size difference between the BG 16V 470uF compared to the Pana FC 16V 470uF. Its about 3X bigger LOL
Brent
martin clark said:
When building a small reg pcb with dedicated TX I always use larger caps (16V 4700uF) the amount of bass and midrange depth is improved no end in that particular application.
The general rule I stick too (through experimenting) is use large caps after TX (4700uF) and not quite so large on the input of a reg(3300uF). After a reg ill use a something like 220uF of 470uF. And then a cap of around 220uf - 470uF like a BG or Silmic next to the item recieving the voltage.
Brent
Peter Venema said:
Hi Peter,
Ah, you saw my bid on Marktplaats 😀 ? I didn't get it yet, I just mailed the guy and asked why he doesn't respond to my 100 euro bid for this player. It's not really a cheap bid...
The color would go nice with my 8400 😀.
I haven't tried ANY dedicated regs yet, just replaced and removed some parts 😀. I'm too busy with other things right now, like a 8400...
Pls. keep us updated on the results, very interesting.
Regards,
Ray