Cogito wrote:
tomp wrote:
I agree that if it is a one off situation you are probably better off using Vector board with pins than going straight to a PCB design. When I make more than one off I use Express PCB because they provide the software and have reasonable prices for small runs. Here is a link to Vector and a photo of one of the boards that Express did for me:
https://www.vectorelect.com/vectorbord-patterns.htmlhttps://www.expresspcb.com/Tom,
I will go with the PCB method. What do I need to take into consideration for the PCB?
Any recommendations on potentiometers ? I need them on each channel for level matching.
The most important thing to get right in PC bard design is that the layout and all details are correct. I did a board once and took for granted I knew the pinouts of an IC voltage regulator I had used many times. My memory must have been bad because I got the pinouts wrong. After the boards were done I had to lift one of the board traces and add a wire jumper to get the boards to work.
The nice thing about the Express PCB software is you first draw your schematic with the schematic portion of the application and then when you do the physical parts layout, it has a function that if you click on one component lead it will highlight all the other leads that connect to that first one. It makes layour much simpler.
As far as potentiometers, I don't use any in passive crossovers. Generally the power handling requirements of speaker level resistors in crossovers are too high. If you are going to do the passive crossover at line level to feed the inputs of different amps the situation is different. Generally for audio work I use plastic film pots because the noise level is low and longevity is high.