About EH Microsynth corrections

Started by DVB_master, August 12, 2007, 03:25:43 PM

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DVB_master

Hi I'm interested in this one.
Somebody in the forum posted the original microsynth schematics a while ago.
There are some differences from the pdf version http://filters.muziq.be/files/schematics/eh_microsynth.pdf.
In the above the pot r101 is connected to q4, q5, and the third pin is unconnected. The original shows pin 3 of r101 connected to v- supply.
Then pin 1 of r74 pot is unconnected in pdf version, in the original schematic it's connected to ground instead.
What do you think about?
Here's the original schematic reposted.  ::)
http://img518.imageshack.us/img518/551/ehmsynth2bcq2.jpg
Many thanks to everyone!!!  ;D

oskar

http://img.photobucket.com/albums/v517/uncle_boko/EHmsynth1d.jpg
http://img.photobucket.com/albums/v517/uncle_boko/EHmsynth1c.jpg
http://img.photobucket.com/albums/v517/uncle_boko/EHmsynth1b.jpg
http://img.photobucket.com/albums/v517/uncle_boko/EHmsynth1a.jpg

This is the 10/78 revision ( the rev. before ) I think the hartery revision is trying something in between with the sweep rate control.
Also, in this earlier thread I spotted some errors that seem to originate from the revision your posting.
http://www.diystompboxes.com/smfforum/index.php?topic=59838.msg468544

:) skar - Whoopie!!! a microsynth thread!

oskar