Hi Richard. Thats great! Genuinely excited about the results and getting my greasy hands on some boards!
Yes wasn't he using the Wurth which looked same as Coilcraft to me. I think I'll just order them from Mouser as I'm about to place an order and they aren't much cheaper on Ali.
Oooohhhh, I see you have gone for the string of capacitors on output, this can be interesting : ) Did you get to hooking up stage Richard?
Hi Jim, yes it was the Wurth:7443642200, robust little beasties.
https://nl.farnell.com/en-NL/wurth-...elded/dp/2431616?CMP=e-email-sys-orderack-GLB
Just opened the delivered package.. The amp kits look amazing. Boards are beautiful! Cant wait, Thanks!
Glad your package got there safely Joel. E-packet is always a slight worry with its sometimes very extended delivery times. Do post about your results!
Just finished the second AMP211 and having a listen. I went for the shunt PSUs in the end which are created out of a string of 9 green LEDs and a couple of transistors. I guess the next step up is the SER2918s? Oh and going up to 15,000uF for C6. The boards are arranged at such a jaunty angle because I didn't make the interconnecting cables long enough.
If anyone's super gung-ho and wants the gerbers, just shout. We've discovered one mistake so far, in the de-noiser section there's a GND track missing. I'm attaching the schematic.
If anyone's super gung-ho and wants the gerbers, just shout. We've discovered one mistake so far, in the de-noiser section there's a GND track missing. I'm attaching the schematic.
My immediate reference isn't the previous incarnation, rather an experimental enhanced version along the lines of @IVX's idea over here : https://www.diyaudio.com/community/...essimistic-review.277130/page-32#post-5527982 That one did sound slightly more transparent than the original monoAMP, on this I've not noticed a step backwards yet so I suppose that's quite promising. I'll need more long-term listening, and directly against monoAMP before putting any impressions down in writing. I'll also be interested to know which mods give the most improvement, I'm guessing the lower noise PSU contributes more than improved output inductors so I might experiment with just introducing the shunt to the original.
Hi Richard, awesome! Great to see the new boards in action. When comparing to the original are you using the same setup as references - the new input trannies, capacitor string output and board cap values? All things equal, that would be a solid comparison : )
Really interested in the sound comparison when using this denoiser circuit, although I have no reason to use it with the magnificent sparkos regs here, that was a place of great improvement.
I'm not using the denoiser at present, rather my green LED shunt together with the original LM317 configured as a CCS. I'll work on a retrofit of the shunt into a pair of (old) monoAMPs to work out whether that alone is giving an improvement. I have previously tried the multiple paralleled output caps and didn't notice the SQ change.
I received the 3D printed front panel for my MonoAmp today so it's all now buttoned up and ready for action! I do have to replace the two upper bolts though, the bottom two are black stainless steel but I only had two left.
Richard. What are the chances of you doing some through hole versions of your amps and dacs?!
The ICs and semis aren't a problem but the number of smd caps and resistors is really slowing me down!
The ICs and semis aren't a problem but the number of smd caps and resistors is really slowing me down!
James - the resistors and SMD caps are all pre-fitted on the monoAMP kits. Or were you thinking ahead about Kubelik kits? If there's enough interest in Kubeliks with pre-fitted resistors we could run a batch of boards for that. Caps can't be pre-fitted as JLC doesn't hold stock of NP0s.
Richard - both the kubelik and monoamps that I have had boards made using the gerbers you kindly provided!
No worries, I know it is probably a lot of time and for not a lot of demand.
I shall persevere with them!
Got an order in from Mouser and so I have the big coilcrafts now, they do line up to monoamp quite nicely as shertzy proved. Just the 3rd NC mechanical strain relief pad nowhere to go but obviously that's easy to sort a reasonable solution for for now.
No worries, I know it is probably a lot of time and for not a lot of demand.
I shall persevere with them!
Got an order in from Mouser and so I have the big coilcrafts now, they do line up to monoamp quite nicely as shertzy proved. Just the 3rd NC mechanical strain relief pad nowhere to go but obviously that's easy to sort a reasonable solution for for now.