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300w sub amp help
300w sub amp help
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Old 28th April 2003, 08:47 PM   #1
zoki_g is offline zoki_g  Maldives
diyAudio Member
Join Date: Apr 2003
Question 300w sub amp help

well i want to build that 300w power amp but i can`t buy the pcb from Rod because i live in Macedonia and buying the pcb is:
first -to expencive
second- there is no 100% guarantee that i will get the board.

Can anybody help me with some advices about how to make my own board(layer if possible) for this amp??
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Old 29th April 2003, 12:14 AM   #2
Diode is offline Diode  United States
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Join Date: Feb 2003
Location: Oklahoma USA
How many layers?

I don't know about what supplies you can get but I'm considering making my own too. I'll probably get some ferric chloride etching fluid and do the Xerox copier thing, where you copy the layout from a magazine or the like, and mirror the image and then copy it again with heavy toner. (make a real dark print) Then lay the copy on the unetched copper clad board and use an iron to rub the toner onto the board. Lift the copy paper and you should have a copy of the artwork on your copper clad board. Use a permanant, black marker to clean up any holes and then etch the board. I made it sound easy but this isn't easy and it takes a long time to do if you desire a quality job. It is the most affordable way I can think of though.

Good luck,
The best audio is clean audio!
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Old 1st May 2003, 10:47 AM   #3
sangram is offline sangram  India
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Join Date: Sep 2002
Location: India
Problem with that is that Rod will not give the PCB design, and I think he's right in not doing so - the man eats off the sale off those PCBs. I know it's expensive but I'll be ordering anyway for the Linkwitz-Riley XOs if the breadboard attempt does not go well...

That said, I don't think this is very difficult or complicated to wire onto a veroboard. The heavy wiring can be done driectly at the devices on the heatsink, and the rest of the circuit is anyway quite small... 4 transistors and a bunch of passives.

Even though Rod doesn't recommend wiring it on vero, I wouldn't see much of a problem if only the input and pre-driver stage is on the board, and the outputs mounted on to the HS and hardwired.
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Old 1st May 2003, 10:49 AM   #4
sangram is offline sangram  India
diyAudio Member
Join Date: Sep 2002
Location: India
Zoki to answer your original question you will have to copy this design into a PCB design program and hav it make a PCB for you. Anything else will be a lengthy process...
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