Hello amplifionados,
I started my ACP+ this evening first time. This babe sounds really good.
I need more listening. Also listened with my headphones (250Ohm cans) -
adjusted resistor at output from 33.2 ohm to 37 ohm (switchable) for the headphone
I made a little linear regulated power supply with LT1085 and RCRC-filter.
Voltage adjustable and exactly 24 V.
Voltage at DC1 is at 11 v and 11.1V.
Over R15 I measure 4.44V.
My R4 value is at around 40 Ohm (33 Ohm resistor + 100 Ohm- trimpot dialed down close to zero)
JFets are at around 30C temerature. Mosfets run hot at around 60 - 65C.
Mosfet - heatsink is at around 35C.
Greets
Dirk
Nice!
You could very well be the first one to do this.
You should be able to easily find the dimensions of both PCBs and the ACA case around here.
If they fit, build it, and share your pics here or here. This is Do it Yourself audio, after all!
Cool thanks. Nope, no tube output stages here so I'll go with the 10k
You could very well be the first one to do this.
You should be able to easily find the dimensions of both PCBs and the ACA case around here.
If they fit, build it, and share your pics here or here. This is Do it Yourself audio, after all!
From what I can tell - withmatt's PCB is 120 x 160mm, but I am looking for confirmation from someone who got this PCB.
Also, the "useful" internal width of the ACA case is 150mm, so the 120mm wide PCB should fit, but I have no idea whether or not the ACA components (attached to the side heatsinks) reduce this useful 150mm (and by how much)?
That is the reason I was asking the great people here for more inputs before placing orders for the case ;-)
As a side note:
If anyone got a spare PCB of the latest revision by withmatt - PLEASE contact me so I can buy it from you.
Thanks Jim.
Can you please measure the clearance between the 2 black & white caps? (width of green rectangle in my attachment)
I am considering going 1 size wider, which adds 100mm (probably big overkill), or 1 size deeper, which adds 50mm and that would allow to use Nisbeth's 3-PCB design (placing them one-behind-the-other style).
Thanks,
Zachi.
Can you please measure the clearance between the 2 black & white caps? (width of green rectangle in my attachment)
I am considering going 1 size wider, which adds 100mm (probably big overkill), or 1 size deeper, which adds 50mm and that would allow to use Nisbeth's 3-PCB design (placing them one-behind-the-other style).
Thanks,
Zachi.
Attachments
Just get the wider chassis.
Ask for the amp camp heatsinks. Figure out what inputs you want on the back. Determine if you want to keep the pot and headphone jack on the PCB (which makes mounting everything inside trickier) or connect them with wires to the front panel. Figure out where you want the power switch and a power indicator LED.
Ask for the amp camp heatsinks. Figure out what inputs you want on the back. Determine if you want to keep the pot and headphone jack on the PCB (which makes mounting everything inside trickier) or connect them with wires to the front panel. Figure out where you want the power switch and a power indicator LED.
Due to space limitation - I might prefer going deep over wide.
That is the reason I would really appreciate a measurement of the clearance between those 2 protruding black & white caps.
Going deep would allow for the Nisbeth 3-PCB solution.
Jim, I am trying hard to avoid throwing away a $200 case because it won't fit the project I am desperately trying to stuff in it...
The software what I used is AD20. If u want to made stereo channel , u need 2
boards.One PCB is one channel.
Thank you!
Question regarding the headphone jack:
Nelson Pass' BOM has the NEUTRIK NYS216G listed.
I am looking for equivalent that has Straight, instead of Right Angle orientation. I am looking to mount off-PCB to a front panel.
I came across the following 3 options:
1. Neutrik NJ6FD-V
2. Neutrik NJ6TB-V
3. Neutrik NYS234
Can someone please confirm which of the 3 would be a true equivalent (including the switching capability to disable the RCA output when I plug in headphones)?
Thanks.
Nelson Pass' BOM has the NEUTRIK NYS216G listed.
I am looking for equivalent that has Straight, instead of Right Angle orientation. I am looking to mount off-PCB to a front panel.
I came across the following 3 options:
1. Neutrik NJ6FD-V
2. Neutrik NJ6TB-V
3. Neutrik NYS234
Can someone please confirm which of the 3 would be a true equivalent (including the switching capability to disable the RCA output when I plug in headphones)?
Thanks.
I think this is the one you want: NYS212
https://www.mouser.com/ProductDetail/REAN-Neutrik/NYS212?qs=JfNPhaIww3JmEJtrIIVl%2Bw==
This pdf document might be helpful
https://www.neutrik.com/media/8557/download/jacks---circuits.pdf?v=1
Or you could "buy insurance" to guard against making the wrong choice. It's easy and it's not incredibly expensive either. Just buy all three and see which one(s) are exactly what you were hoping for. The cost is pretty low and the benefit (peace of mind) might be pretty high, depending on your own personal tastes for risk, reward, cost, and waste.
_
https://www.neutrik.com/media/8557/download/jacks---circuits.pdf?v=1
Or you could "buy insurance" to guard against making the wrong choice. It's easy and it's not incredibly expensive either. Just buy all three and see which one(s) are exactly what you were hoping for. The cost is pretty low and the benefit (peace of mind) might be pretty high, depending on your own personal tastes for risk, reward, cost, and waste.
_
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