Homebrew PCBs

Thanks for that.

What I'm really looking for is some help going over a circuit that has  
been hacked from stereo back to mono and making sure that all the  
wires connect up (so to speak), on schematic and PCB.

Any takers?




Quoting "\\M" <yahell@...>:

>
> I am fiddling with a 2-way active filter with options like   
> phaseshift on the LP-filter and adjustable Q.
> I am using standard dual OPAMPs from BB-  OPA2134. Not top of the   
> top but enough good to be used in audio equipment.
>
> The idea is to make one PCB with the filter and keep the PSU   
> separated - different chassis to keep noise and hum down.
>
>
> /M
>
>   ----- Original Message -----
>   From: david.mcauliffe@...
>   To: Homebrew_PCBs@yahoogroups.com
>   Sent: Sunday, December 03, 2006 10:47 AM
>   Subject: [Homebrew_PCBs] Assistance with schematic and pcb- 3way   
> active crossover
>
>
>   Hi,
>
>   I'm looking for some help with a PCB, and its schematic. I'm not
>   feeling very confident at the moment.
>
>   It comes from a stereo 3-way active crossover, which is twice as many
>   channels as I need. This send the signal to three amplifiers, not
>   three speakers. I'm also looking at a couple of little changes as it's
>   going to be used on an instrument rather than an audio system- 1/4
>   jacks instead of RCA, that sort of thing.
>
>   I've managed to get the schematic for one channel, and the power
>   supply, and an image of the stereo PCB. I'm looking for some help
>   putting the channel and the power supply together, and then onto a PCB.
>
>   It uses three quad op-amp TL074s, and I was also hoping to get some
>   advice on whether there is anything newer and quiter. Or maybe even
>   changing this to six quieter op amps (the chip number escapes me right
>   at this moment - I've got 5534s or similar echoing in my mind??? My
>   notes are elsewhere!)
>
>   I'm not willing to post the info I've got openly yet. While the design
>   was originally published in a magazine and the PCB is available on
>   their web site, I'm not too sure about the copyright status and
>   throwing it open to the group.
>
>   If anyone feels like they want to and can help, can you drop me a line
>   on this email.
>
>   Hoping to hear from someone soon,
>
>   Cheers,
>
>   David.
>
>
>
>
> [Non-text portions of this message have been removed]
>
>