[sdiy] 3541 tri core - Hi Scott :)

[Scott Gravenhorst]

Thanks Tom,

I had seen this once before, and in fact I have a CMOS sawtooth VCO
with a similar scheme (also in CMOS) to make triangle from sawtooth
installed in one of my FatMan synths.



"tomg" <e4m at houston.rr.com> wrote:
>.....Re-Bump....
>My email has been screwed for 2 days... I never know
>if what I sent got there or not.  I'm sure I'm not receiving
>everything.
>
>I added a mpg so I have an excuse to hijack this again 
>anyway... :) You can really see the tiny glitch going from 
>lf to hf. Gotta go avi next time....
>http://www.ele4music.com/pics/3541_tri.mpg
>
>New pic If you can't stream,dl or just don't want 7.5M 
>http://www.ele4music.com/pics/3541_tri.jpg
>
>New group scan..
>http://www.ele4music.com/pics/3500_pile.JPG
>
>I tossed the Palm pics and scanned the boards.
>I did not get done.... oh well I'll get them up 
>asap... today?  Sorry, the Palm has a crap spot
>at 6" .... 2" < fine, 12" > fine,  6" = crap :)
>
>Regards
>Tom
>
>
>Hi Scott, You don't think I forgot a tri core vco do you? 
>
>This works really well. It's not really a tri-core like OTA 
>vcos but there is no switching. There is no setup or trimming 
>you turn it on and up pops this (practically perfect no kidding!) 
>beautiful tri.
>
>I snapped the pic with my Palm and it makes it 
>look a  little weird. Might not be able to do it with 4069s but 
>it's nice and easy. :) Kinda like the vco4 core but cheaper, 
>easier and just plain better. If you try it 1% all those 10Ks 
>after  Q2. The vco4 is still better at tracking at ultra-sonic
>frequencies. I'll build a vco4 replacement for part-2 with this 
>core.
>http://www.ele4music.com/pdfs/3541.pdf
>http://www.ele4music.com/pics/3541_tri.jpg
>
>BTW  I'm shipping. So some DIY members might have theirs 
>by now... Enjoy. :)
>
>Regards
>Tom
>
>
>> http://home1.gte.net/res0658s/electronics/4069UB_Tri_VCO.html
>> 
>> A bit of SDIY for y'all out there.
>> 
>> ---------------------------------------------------------
>> - Where merit is not rewarded, excellence fades.
>> - Hydrogen is pointless without solar.
>> - What good are laws that only lawyers understand?
>> - The media's credibility should always be questioned.
>> - The only good terrorist is a dead terrorist.
>> - Governments do nothing well, save collect taxes.
>> 
>> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>> -- Linux Rex         | RedWebMail by RedStarWare
>> -- FatMan: home1.gte.net/res0658s/fatman/
>> -- NonFatMan: home1.gte.net/res0658s/electronics/
>> -- Autodidactic Master of Arcane and Hidden Knowledge.
>>
>

---------------------------------------------------------
- Where merit is not rewarded, excellence fades.
- Hydrogen is pointless without solar.
- What good are laws that only lawyers understand?
- The media's credibility should always be questioned.
- The only good terrorist is a dead terrorist.
- Governments do nothing well, save collect taxes.

-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.gte.net/res0658s/fatman/
-- NonFatMan: home1.gte.net/res0658s/electronics/
-- Autodidactic Master of Arcane and Hidden Knowledge.