Bell Tone Synth Works

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Probably the most dramatic "failed diy build rescue" we've ever done... This Heathkit Vox Jaguar had never made sound as...
07/26/2019

Probably the most dramatic "failed diy build rescue" we've ever done... This Heathkit Vox Jaguar had never made sound as long as it's current owner had had it, and that's because the voice selection/filter section was never built! The filter board, including the rocker switch contacts and a lot of the wiring, was missing entirely but over the last 2 days we recreated the circuitry and switch contact setup on stripboard from the schematics and wired it all up. 50 years later, the build is finally finished and it finally gets to make its first sounds!

On our days off from fixing things for money, sometimes we fix things for free! Today from 10 to 1 at the  Repair Fair a...
04/20/2019

On our days off from fixing things for money, sometimes we fix things for free! Today from 10 to 1 at the Repair Fair at Circle of Hope on Frankford Ave in Fishtown, everyone is invited to bring your broken household items in for free repair help. We've fixed your synth-- now let us fix your toaster!

12/21/2018

1:25 am... whenever we have a drum machine in that has a cowbell sound on it I always am tempted to use way too much of it

Looks like the previous "technician" who worked on this Roland CSQ-600 was e###xtra conscientious about NiCad battery sa...
12/20/2018

Looks like the previous "technician" who worked on this Roland CSQ-600 was e###xtra conscientious about NiCad battery safety

Did I really just spend my Sunday afternoon designing a custom preamp for this "Johnson Intonation Trainer"? uhh, that w...
12/16/2018

Did I really just spend my Sunday afternoon designing a custom preamp for this "Johnson Intonation Trainer"? uhh, that would be a yes. My usual sad weekend synthtech nerdery has overflowed beyond synthdom and is now spilling out into strange crevices populated with microtonal educational combo organs @ Bell Tone Synth Works

12/16/2018

Aaaoooaaaaa // OOooAaaaaaOooo / Mark 3 ARP Osyssey sensing the force with rebuilt PPC. ((Excuse my weird double jointed fingers))

12/08/2018

More experiments with the ADC organ CV interface and 3 voice of Saturn sequencers, patching up a AND gate logic inspired patch. With nonsynced gates between the 3 sequencers; sequencer 1 in addition to sequencer 2 or 3 has to be playing a gate for 2 or 3 to change notes. Creates some random seeming melodies and rhythms with notes hidden and reappearing. (dm for truth table)

And now a big announcement! We just signed the paper to rent our first commercial space, moving in January 1. I kind of ...
12/07/2018

And now a big announcement! We just signed the paper to rent our first commercial space, moving in January 1. I kind of can't believe it!! We'll be dabbling in consignment and sales in addition to expanding our capacity to take on more repairs. Can't wait to get started!

And now a big announcement! We just signed the paper to rent our first commercial space, moving in January 1. We'll be d...
12/07/2018

And now a big announcement! We just signed the paper to rent our first commercial space, moving in January 1. We'll be dabbling in consignment / sales in addition to expanding our capacity to take on more repairs. Can't wait to get started!

Synth restoration tip: modern FSRs (force sensing resistors) work great for reviving crappy old ARP PPC pads!
12/07/2018

Synth restoration tip: modern FSRs (force sensing resistors) work great for reviving crappy old ARP PPC pads!

12/03/2018

what do us synth tech freaks do on our days off? Well, this weekend Darian achieved his years long dream of building an interface to allow 3 analog cv sequencers to control an old Italian combo organ using no microcontrollers, just 3 DACs and a handful of 16 channel analog multiplexers

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