This is the first module towards a Buchla 200 clone: The Buchla 291 dual voltage controlled filter. Using Mark Verbos’ PCB design (scroll down to “Buchla Bandpass Filter”) I made some minor adjustments and etched the PCB.
After soldering the PCB I started designing the front panel in Front Panel Designer using a picture of the original front panel for reference.
I’m using 16mm Alpha pots for the front panel, banana jacks and 3.5 mm jacks. I had the basic layout pretty fast but tweaking until everything was right took a bit longer. To be absolutely sure everything would fit I decided to make a prototype front panel using scrap wood so I could see if everything would fit like I thought it would. I printed the design and drilled the wooden panel.
Then I mounted the front panel components. The 3.5 mm audio jacks didn’t fit as the wood I used had a thickness of 5 mm and the jacks can only be mounted on panel with a maximum thickness of 2 mm.
And everything fits! Time to order a professionally silk screened front panel.
To be continued…
Any chance for an FPD file for this filter?
Hi,
Where did you get that blue PCB?
Regards,
Gábor
I bought them from Conrad.
Here is a link: http://www.conrad.com/ce/en/product/528412/Proma-FR4-Epoxy-Resin-Board-Cu-35-m-Sin/
Hi Andre,
Thanks for the tip.
Is it possible to contact you somhow?
I’ve ordered this from Conrad Hungary, actually 2 times, but I’ve got the simple, natural brown version.
I need at least one piece to finish my 112 clone 🙁
Hi Gábor,
Sorry to hear you’re getting the wrong PCB’s from Conrad. Unfortunately I do not have any blue PCBs left but I will have a look if I still have the original invoice to check the product number.
If you want to e-mail me, use the e-mail address on the About Me page…
Andre.