[sdiy] 4046 in VCOs (was Hi frequency VC clock)

[Tim Ressel]

Color me excited!  You can still get the LM331!  Its the Fairchild clone 
called the KA331. Mouser has it in stock for $0.56! Why didn't anyone 
tell me?

--tim (ordering now) ressel


On 6/21/2017 5:10 AM, Matthias Herrmann wrote:
> Thank you for the link, and this is exactly what I am talking about.
> For the 4046 VCO Thomas Henry did NOT use the TI part, but the Motorolla, so you may want to change that.
> And fun fact is that the 446s with 1% linearity worked well, hoever, the 4046s with .5% or less did not.
> http://www.birthofasynth.com/Thomas_Henry/Pages/X-4046.html
>
>
>
>> -----Original Message-----
>> From: Neil Johnson [mailto:neil.johnson71 at gmail.com]
>> Sent: Wednesday, June 21, 2017 1:16 PM
>> To: Matthias Herrmann <Matthias.Herrmann at jeppesen.com>
>> Cc: synth-diy at synth-diy.org
>> Subject: Re: [sdiy] 4046 in VCOs (was Hi frequency VC clock)
>>
>> Hi,
>>
>> Matthias Herrmann wrote:
>>> Haha, yes!
>>> The 4046 was not intended to be used as an audio VCO. And this was
>> reason enough for Thomas Henry to actually try and do it, I guess. I did other
>> weird fun stuff as well.
>>
>> https://urldefense.proofpoint.com/v2/url?u=http-
>> 3A__www.milton.arachsys.com_nj71_index.php-3Fmenu-3D2-26submenu-
>> 3D2-26subsubmenu-
>> 3D9&d=DwIBaQ&c=P3aKjizb3qsxp0SERaL2sw&r=Wo0ERRj3NwEx1MVmRi7Tj
>> 3kJss6CkyI0BMe1OujCfok&m=m98owWkJGXxMW52G24d4bI_Q-
>> Xo1pqLxO_dMtXF5ZQw&s=bPXhF9X3OYFgdurqYYibQAJHtRbiRw1n5K89ru81S
>> _E&e=
>>
>> Neil
>> --
>> https://urldefense.proofpoint.com/v2/url?u=http-
>> 3A__www.njohnson.co.uk&d=DwIBaQ&c=P3aKjizb3qsxp0SERaL2sw&r=Wo0
>> ERRj3NwEx1MVmRi7Tj3kJss6CkyI0BMe1OujCfok&m=m98owWkJGXxMW52
>> G24d4bI_Q-
>> Xo1pqLxO_dMtXF5ZQw&s=vVDjr1EN_4HYTlKUL8brz9eWlSwaijCzLE9Ps_Of9b
>> I&e=
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-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com