Cool.

Do you use that NOS stock for ALL the Tantalum positions on the 2 boards?

Is there a big difference between them and the mouser caps?

Cheers.

Great stuff boops.

Lots of helpful info.

Those caps in the photo?

Are those the ones in the mouser BOM or special ones you have found.

Amazing project.

Buchla, 200 series, DIY, vactrols!

What’s not to love.

That 296 looks like a total headache. Bet it’s sound lovely though.

Thanks momo. I found those verbos pics. Dave brown has just put up some closeup images of a vintage 259 (or maybe vintage recreation) which will be very helpful. It’s part of the MEMS project and is mentioned over in the Buchla forum section. Look forward to building and posting my progress (or lack...

Great stuff.

Do you have any images of the completed boards (component sides) to get an idea of the build?

Cheers.

Would the vactrols need matched for this like in a low pass gate?

Or will any vactrols work for this module?

Cheers. Look forward to building.

Yes I got this as a print out with the live concerts Lp

Very interesting read

I love how she definitely has her own sound, even within the Buchla world

Amazing stuff

Great video. Very interesting.

Vactrols really are a law unto themselves!

Love my euro bananas!

I would also like to see a 292 video. A very simple waveform into the audio input and then various pulses and envelope shapes (very short and then Long) feeding the CV input in the 3 different modes. This is a selfish request as I have finished a 292r clone and would like to see if my vactrols are g...

I would also very much like an in depth 291 video.

Filter sweeps in the various modes and different Q levels.

Thanks!

Thanks Dave.

I will try your resistor changes in parallel to sort the sine before I start removing transistors.

Much easier.

Thanks for all the help guys. I will report back

Now I need to find a nice resistor substitution box.

Thanks for all the info guys. I will buy some more j201 from mouser (SMD) and when I find six that are in spec (from the dunington audio BOM data ) I will swap them out on my 258. I will do the 3 in the top oscillator first to see if it works just in case Thanks for help. It’s a shame the Roman BOM ...

Exactly the same on both oscillators.

It’s slight but it’s noticeable

Do I need to match all 6 J201?

I didn’t do that

Oh dear....

Thanks for the update

If the module isn’t complicated enough, Don decided to also put switches on there that don’t do anything!

Look forward to building

Hey guys Just finished my Rev 3 258c (Roman) and it sounds amazing Not calibrated the tracking yet but will use Dave browns excellent notes. A quick question. My sine has little “camel humps” at the top and bottom of the waveform. I have the trimmer maxed clockwise Has anyone experienced this? I’m n...

Looks great.

What does the auto tune function do?

Is it just a sine tone to tune to like on the minimoog?

Not to de-rail the thread... But how are people testing vactrols? Matching resistance or Pinging a 292 and recording the Audio and measuring audio decay on a DAW? Or just what sounds good by ear? Is matching important in the 291 filter and 259 also or is it just an issue with LPGs? Hoping to build s...

Looking forward to the website and getting to build a 259 soon.

Great to hear it is now all through hole.

I promised myself I would only ever commit to one diy polysynth (due to the time, effort and cost of building) and this is it!

Can’t wait.

We’re going to need a bigger roll of solder.

Looking forward to the “pre soldered SMT” version.

Amazing synth!

Look lovely.

Can this version be trimmed to 1V per octave with resistor changes or will it only work with 1.2V?

Hey guys

I am interested to know if the official 218s (old and new) have a stepped voltage on the pressure CV out rather than a smooth one

I have read that some of the DIY Clone 218s have stepping on the pressure out and wanted to know if that is a “feature” on all models

Thanks

Beautiful. Nice to see it in a pedal box. I just finished the phaser in a pedal box.

Any photos of the mess inside?

I’m hoping for mostly TH.

I take no joy in SMD.

My eyes and hands and patience struggle with it.

I’m also hoping for a EU based distributor to handle this side of the ocean.

Amazing project. Great work.