the KORG25 hybrid mystery show comes to an end!

[Martin Czech]

Do you remember the Korg MS20 filter debate?
We couldn't figure out what this strange "KORG35" hybrid
single line package chip was (early models).
I managed to get hold on one of these, but didn't want to "open"
it. J.H. made some assumption about the inner circuit.
I even suggested X ray.


Then a friendly soul in Japan wrote me an email, containing
the address of some of the engineers who made the MS20.
Some Mr. Saegusa.
His work was gratified and he is now up in the hierachy in
KORG Japan (the western world seems to like more lawyers
in the top who have no clue...).

I wanted to write a letter to this address, but you know my
problem: no time. Now I'm moving house, this means clean up.
Also mail box. So I found this mail again (I think it was 
Dr. Osamu, thank you!). And I sat down and wrote this
letter. I thought that I would never get an answer and forgot
about it.

Now, saturday I returned to my old appartment with some
buckets of paint. What do I see in the mail box?
Airmail Japan! Korg!

Mr. Mori (general manager new products) explains to me
that his boss (Mr. Saegusa) is really called Mieda,
but this is the same writing in Japanese.
Anyway, they found my letter quite cool and therefore 
included two pages of schematic, test circuit etc. for
the KORG25 hybrid!

4 bip trans
1 jfet
6 resistors

not quite the proposed circuits...

The problem is: it is explicitly forbidden to gain
economic advantage from this information.
And I will respect that. Point.

You know all the Doepfer case. If I put this information
on my web page, there may be a commercial KORG MS20 filter clone
very soon.

Now, I consider me to be trustworthy, therefore I can not
publish this in the moment.

Any suggestions how to avoid this conflict?

m.c.