# The BST Thread (Buy, Sell, Trade)

**URL:** <https://lookmumnocomputer.discourse.group/t/the-bst-thread-buy-sell-trade/1608>\
**Category:** Uncategorized\
**Created:** [August 13, 2020, 4:03pm UTC](https://lookmumnocomputer.discourse.group/t/the-bst-thread-buy-sell-trade/1608 "2020-08-13T16:03:38Z")\
**Posts on this page:** 1\
**Showing post:** 270

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**Author:** ![K.ostas](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@K.ostas](https://lookmumnocomputer.discourse.group/u/K.ostas)\
**Post date:** [March 21, 2025, 12:09am UTC](https://lookmumnocomputer.discourse.group/t/the-bst-thread-buy-sell-trade/1608/270 "2025-03-21T00:09:15Z")

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It’s my turn to offer a few PCBs for trade. Currently available:

- Kassutronics/Analog Output [Precision ADSR](https://gitlab.com/rsholmes/precadsr). Main PCB only. I was successful in kludging all the controls behind a custom panel, so I only needed the main board. This way you can use any footprint for the A1M potentiometers which I had trouble sourcing. See my post [here](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/6626).
- EFM [Dual Voltage Processor](https://www.eddybergman.com/2020/11/synthesizer-build-part-36-dual-voltage.html). Single PCB. Can be used behind a Kosmo or Eurorack panel.
- Moritz Klein (Ben Jiao version) [Diode Ladder VCF](https://benjiaomodular.com/post/2022-03-11-mini-vcf/). Main and control PCB set, no panel. Eurorack format but I was able to fit it behind a Kosmo size panel. See the picture below.
- Gerbster [Echo/Reverb](https://www.gerbster.nl/eurorack/echoreverb-unit/) (Synthrotek’s Echo clone). Single PCB, no panel. You can fit this behind a Kosmo size panel, but the board has a couple of issues. See the discussion [here](https://lookmumnocomputer.discourse.group/t/10-pin-power-connector-on-pcb-all-wrong/7107).
- Ian Fritz [simplified matching transistors circuit](https://modwiggler.com/forum/viewtopic.php?t=81990&sid=a452eb8f1a7ead193ef0968cd703fd05&start=25) on a small PCB. See the discussion [here](https://lookmumnocomputer.discourse.group/t/matching-transistors/6267/20).

I am primarily interested in single boards that I can kludge behind a custom Kosmo panel so they could be Kosmo, Eurorack, or some other format. Can be anything really, just let me know. I don’t really expect that anyone will be hugely interested in trading the last two I have on offer, so I will happily throw them as extras in another trade if you’d like to!

The national post here is particularly affordable for a small letter, so I have no problem sending these anywhere in the world (Universal Postal Union country members).

 ![20250319_185656](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/9/c/9c1a9bdc90270cb0bea372ed1649dd4f1de66b73.jpeg)

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