Gentlemen, my current project is the design of an "Active Speaker Concept", in which I which I will drive the tweeters and mids of my speakers from Nelson Pass' ACA#1 - ampfiers.
I have done a layout for them on my own (including the R15 mod - you can bypass it, if you want to) and have ordered the PCBs.
I have 3 of these PCBs (image 1) left.
Each PCB consists of 2 identical ACA#1 channels. You can break a PCB with your fingers.
I will give you a PCB for 10€ - shipping worldwide is included.
If you want to have a PCB - give me a PM, and I will give you my PAYPAL-ID.
Best regards - Rudi
I have done a layout for them on my own (including the R15 mod - you can bypass it, if you want to) and have ordered the PCBs.
I have 3 of these PCBs (image 1) left.
Each PCB consists of 2 identical ACA#1 channels. You can break a PCB with your fingers.
I will give you a PCB for 10€ - shipping worldwide is included.
If you want to have a PCB - give me a PM, and I will give you my PAYPAL-ID.
Best regards - Rudi
Attachments
Gentlemen: I have just finished a pair of my ACA#1 - PCBs and have adjusted them (Image 1): no problem.
The heatsink on the picture (my ACA#1 - PCBs include the "R15 - mod") gets "slightly warm". This is why I decided to use a PC fan to cool them.
If I would use an appropriate heatsink with vertical cooling fins, the fan is not needed!
Since I am asked from time to time:
I will offer you a pair of these PCBs (including the R15-mod; there is a jumper to use the mod or not to use it) for 10€ including world-wide shipping.
The PCB's size is 47 x 75mm.
I am using 1.6mm FR4 - material with a 35µm copper plate, but since the "meaningful" tracks are layouted top and down: it is a 70µm copper layout.
If you are interested to have a pair like this: tell me!
The lead-time for the PCB is about 3-4 weeks.
Best regards - Rudi_Ratlos
P.S.: I am using a Dell-Laptop - PSU rated at 19.5VDC / 4.6A to power my ACA#1s.
The heatsink on the picture (my ACA#1 - PCBs include the "R15 - mod") gets "slightly warm". This is why I decided to use a PC fan to cool them.
If I would use an appropriate heatsink with vertical cooling fins, the fan is not needed!
Since I am asked from time to time:
I will offer you a pair of these PCBs (including the R15-mod; there is a jumper to use the mod or not to use it) for 10€ including world-wide shipping.
The PCB's size is 47 x 75mm.
I am using 1.6mm FR4 - material with a 35µm copper plate, but since the "meaningful" tracks are layouted top and down: it is a 70µm copper layout.
If you are interested to have a pair like this: tell me!
The lead-time for the PCB is about 3-4 weeks.
Best regards - Rudi_Ratlos
P.S.: I am using a Dell-Laptop - PSU rated at 19.5VDC / 4.6A to power my ACA#1s.
Attachments
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hello I am always interested by pcb tell me if is always possible .my paypal address: nschlo@gmail.com .also gave me yours thanks
Gentlemen, it has not been my intention to do a groupbuy for Nelson Pass' ACA - PCBs with my layout.
I simply wanted to offer the PCBs that I had to spare.
But since the ACA-PCBs are currently not available from the diyaudio-shop and there is some demand, I will order 10 of my ACA-PCBs (image 1).
The size of a PCB is 75 x 95 mm. It includes 2 channels. It contains the R15-modification, which can be activated / bypassed by means of a jumper cap.
The PCB will be milled in the middle, so you can easily break it with for fingers.
The price for the PCB incl. worldwide shipping is 10€.
The lead time will be about 4 weeks.
I am currently operating my ACAs from a DELL-laptop PSU, but I think that they "deserve a better mate". Browsing through the Power Supply forum, I came across Jason Kuetemann's "Simplistic Cap Multiplier"
(http://www.diyaudio.com/forums/powe...ied-mrevil-pmi-capacitance-multiplier-16.html), and I am sure that his Cap Multiplier will do a much better job than the Laptop PSU.
I cannot use Jason's PCBs, since the ACA only needs one single regulated 19 volts DC supply. I have therefore done an EAGLE layout of his schematic (Jason happily permitted me to use it)
and have already started positioning the parts on the resulting PCB (about 50 x 80mm).
The final layout of the CAP-Multiplier PSU will still take a couple of days, and I would like and talk it over with Jason.
One CAP-Multiplier PCB contains 2 PSUs.
I you are interested, I will offer you this PCB as well.
I have prepared a small EXCEL to show your interest.
http://abload.de/img/smallgroupbuy3is1z.jpg
Best regards - Rudi_Ratlos
I simply wanted to offer the PCBs that I had to spare.
But since the ACA-PCBs are currently not available from the diyaudio-shop and there is some demand, I will order 10 of my ACA-PCBs (image 1).
The size of a PCB is 75 x 95 mm. It includes 2 channels. It contains the R15-modification, which can be activated / bypassed by means of a jumper cap.
The PCB will be milled in the middle, so you can easily break it with for fingers.
The price for the PCB incl. worldwide shipping is 10€.
The lead time will be about 4 weeks.
I am currently operating my ACAs from a DELL-laptop PSU, but I think that they "deserve a better mate". Browsing through the Power Supply forum, I came across Jason Kuetemann's "Simplistic Cap Multiplier"
(http://www.diyaudio.com/forums/powe...ied-mrevil-pmi-capacitance-multiplier-16.html), and I am sure that his Cap Multiplier will do a much better job than the Laptop PSU.
I cannot use Jason's PCBs, since the ACA only needs one single regulated 19 volts DC supply. I have therefore done an EAGLE layout of his schematic (Jason happily permitted me to use it)
and have already started positioning the parts on the resulting PCB (about 50 x 80mm).
The final layout of the CAP-Multiplier PSU will still take a couple of days, and I would like and talk it over with Jason.
One CAP-Multiplier PCB contains 2 PSUs.
I you are interested, I will offer you this PCB as well.
I have prepared a small EXCEL to show your interest.
http://abload.de/img/smallgroupbuy3is1z.jpg
Best regards - Rudi_Ratlos
Attachments
Jason: find attached the 2nd iteration of my layout for a ACA#1 - PSU-PCB - using your schematic.
In my eyes: it looks quite o.k.
If you - or anyone else - finds any error: please report it.
Best regards - Rudi_Ratlos
P.S.: Jason: I like you - a Canadian DIYer - same as EVETTE - my 1st DIY-friend - most! Simply sharing your experiences!
P.P.S: The size of this PCB is 50 x 78 mm. I will offer you 2 milled PCBs as shown above on a 100 x 78 mm PCB.
In my eyes: it looks quite o.k.
If you - or anyone else - finds any error: please report it.
Best regards - Rudi_Ratlos
P.S.: Jason: I like you - a Canadian DIYer - same as EVETTE - my 1st DIY-friend - most! Simply sharing your experiences!
P.P.S: The size of this PCB is 50 x 78 mm. I will offer you 2 milled PCBs as shown above on a 100 x 78 mm PCB.
Attachments
Last edited:
I have ordered 10 pcs. of each PCB yesterday.
Please remember: each ACA - PCB contains 2 ACAs and each CapMult-PCB contains 2 PSUs.
Find attached the current order list.
All of the CAP-Mult-PCBs are assigned.
Please transfer the sum given in column TOTAL to my PAYPAL-ID: RRozek@t-online.de
Make sure that your address as given in the PAYPAL-form is correct.
The lead-time is about 3-4 weeks.
Best regards - Rudi_Ratlos
Please remember: each ACA - PCB contains 2 ACAs and each CapMult-PCB contains 2 PSUs.
Find attached the current order list.
All of the CAP-Mult-PCBs are assigned.
Please transfer the sum given in column TOTAL to my PAYPAL-ID: RRozek@t-online.de
Make sure that your address as given in the PAYPAL-form is correct.
The lead-time is about 3-4 weeks.
Best regards - Rudi_Ratlos
Attachments
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