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 Forum index » DIY Hardware and Software » fonik's place
PCBs for Thomas Henry's X-4046 VCO
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LektroiD



Joined: Aug 23, 2008
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PostPosted: Tue Nov 15, 2011 1:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's my 'ghetto style' 4046 oscillators in 5U format. Thought you might want a look...

And here's the rest of the synth

Any more of these boards available?


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Fonik's Oscillators :)
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Nov 16, 2011 1:13 am    Post subject: Reply with quote  Mark this post and the followings unread

you built four of them and want more? so you are happy with them?

your synth looks great BTW - looks vintage...

and yes, i have PCBs available.

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matthias
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LektroiD



Joined: Aug 23, 2008
Posts: 977
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PostPosted: Wed Nov 16, 2011 6:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
you built four of them and want more? so you are happy with them?

your synth looks great BTW - looks vintage...

and yes, i have PCBs available.


Indeed, they do everything an oscillator should, and track very nicely over a good range of octaves.

I'm in the process of moving, so now is not an ideal time to buy, but I'm definitely in for some more soon! Ideally I'd like another 8, but funds are looking more like I can only stretch to another 4 sets (I may come back for more at a later date).

Also, any plans for Fonik VCAs?
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a.b.o.z.



Joined: Feb 07, 2007
Posts: 350
Location: Zagreb, Croatia
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PostPosted: Thu Nov 17, 2011 3:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

Got mine boards today. Looking funky Very Happy

Thank you
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aladan



Joined: Aug 13, 2011
Posts: 49
Location: Australia

PostPosted: Wed Dec 07, 2011 3:57 pm    Post subject: Low triangle output level on Fonik X-4046 core PCB? Reply with quote  Mark this post and the followings unread

Last night I finished building a X-4046 core board (Fonik style) and the saw and triangle waveforms are looking and sounding beauitful. Sawtooth is around 5V p-p, but the triangle is much quieter; less than 2V p-p. Is this normal? Can I simply decrease the value of R4 (currently 1K) to increase the level of the triangle output, or should I be looking at R32 or trying alternatives for IC3 instead (I think I ended up using a uPC324 because I had no TL074s handy?)

Thanks for the boards Fonik - ordering was a breeze, the price was very reasonable and they arrived here in Australia very quickly. Even the PCB layout and the red boards are aesthetically pleasing! I couldn't be happier Smile

On the weekend I'll try out the waveshaper...
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fonik



Joined: Jun 07, 2006
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PostPosted: Thu Dec 08, 2011 12:16 am    Post subject: Re: Low triangle output level on Fonik X-4046 core PCB? Reply with quote  Mark this post and the followings unread

aladan wrote:
Last night I finished building a X-4046 core board (Fonik style) and the saw and triangle waveforms are looking and sounding beauitful. Sawtooth is around 5V p-p, but the triangle is much quieter; less than 2V p-p. Is this normal?

actually not. what 4046 IC are you using?

Quote:
Can I simply decrease the value of R4 (currently 1K) to increase the level of the triangle output, or should I be looking at R32 or trying alternatives for IC3 instead (I think I ended up using a uPC324 because I had no TL074s handy?)

R4 is nothing but the output impedance resistor according electro notes.
increasing R32 would add gain.
the uPC324 has a wider swong than the TL074, so i don't think this is an issue.

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cheers,
matthias
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aladan



Joined: Aug 13, 2011
Posts: 49
Location: Australia

PostPosted: Thu Dec 08, 2011 5:55 am    Post subject: Re: Low triangle output level on Fonik X-4046 core PCB? Reply with quote  Mark this post and the followings unread

fonik wrote:
aladan wrote:
Last night I finished building a X-4046 core board (Fonik style) and the saw and triangle waveforms are looking and sounding beauitful. Sawtooth is around 5V p-p, but the triangle is much quieter; less than 2V p-p. Is this normal?

actually not. what 4046 IC are you using?

Quote:
Can I simply decrease the value of R4 (currently 1K) to increase the level of the triangle output, or should I be looking at R32 or trying alternatives for IC3 instead (I think I ended up using a uPC324 because I had no TL074s handy?)

R4 is nothing but the output impedance resistor according electro notes.
increasing R32 would add gain.
the uPC324 has a wider swong than the TL074, so i don't think this is an issue.

Thanks for your response Fonik,

The 4046 is one of the "good" brands - an NXP HEF4046BP. I have a few spares of those I can try, and some other unrecommended ones (unknown brand 4046B, ST HCF4046BE and TI CD4046BE.) I checked R32, it's definitely 100k. And I did find and use a TL074 so that's not the issue there either.

Tomorrow I'll try a bigger resistor for R32 and let you know how it goes.

Thanks again!
Adrian.
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fonik



Joined: Jun 07, 2006
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PostPosted: Fri Mar 09, 2012 5:09 am    Post subject: Reply with quote  Mark this post and the followings unread

i just wanted to let you know that i re-ordered a few more of PCBs for this VCO. due to the low order quantity i had to raise the prices.

the PRICES (revised for low quantity re-order)
7.- EUR/10.-USD for the VCO core PCB (saw/tri)
and
5.- EUR/7.-USD for the waveshaper PCB (tri2sin/pulse/PWM)

+ p/p
Deutschland: 1.- EUR/2 PCBs, 1.50 EUR/3+ PCBs
Europe: 2.- EUR/2 PCBs, 4.- EUR/3+ PCBs
Outside Europe: 4.- USD/2 PCBs, 6.- USD/3+ PCBs

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cheers,
matthias
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hegeldas



Joined: Jan 22, 2012
Posts: 18
Location: bruxelles

PostPosted: Mon Apr 16, 2012 10:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

Is it possible to count one of each for me ? how to pay?
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fonik



Joined: Jun 07, 2006
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PostPosted: Mon Apr 16, 2012 11:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

you do the right thing, check PM. Very Happy
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Argitoth



Joined: Jun 24, 2008
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PostPosted: Tue May 29, 2012 10:12 am    Post subject: Reply with quote  Mark this post and the followings unread

Is this a saw core VCO?
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fonik



Joined: Jun 07, 2006
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PostPosted: Tue May 29, 2012 12:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

it is both, a saw and a triangle core VCO!
tomas henry used a very clever method to combine several outputs of a manipulated CD4046 to form both, a saw and a triangle output.just take a look at the schematics:
http://www.birthofasynth.com/Thomas_Henry/Pages/X-4046.html

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Argitoth



Joined: Jun 24, 2008
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PostPosted: Tue May 29, 2012 12:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Aha, a response! Hey! Another question: Does this VCO have variable sync? According to your panel it doesn't but just wondering if you left it out... since... tri-core oscillators usually have it. (Anyway I'm interested in this VCO for its hardsync everyone is raving about!)

What's the + p/p 1 euros for 2?
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fonik



Joined: Jun 07, 2006
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PostPosted: Tue May 29, 2012 10:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

Argitoth wrote:
Aha, a response! Hey! Another question: Does this VCO have variable sync? According to your panel it doesn't but just wondering if you left it out... since... tri-core oscillators usually have it.

don't forget, this is not a VCO with comparator/integrator core. it uses a PLL as core... anyways, this hardsync is worth it.

Quote:
(Anyway I'm interested in this VCO for its hardsync everyone is raving about!)

What's the + p/p 1 euros for 2?

all prices are written in the 1st post of this thread, however, the PCBs are currently sold out. nevertheless, i will re-order a new batch soon and announce it herein the sub-forum.

hope this helps.

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OSCANO



Joined: May 31, 2012
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PostPosted: Thu May 31, 2012 1:38 am    Post subject: Re: PCBs for Thomas Henry's X-4046 VCO
Subject description: re-ordered a few spares...
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Hi! do you still have the PCBs??? Need 2 of each, thanks.
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fonik



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PostPosted: Thu May 31, 2012 2:18 am    Post subject: Reply with quote  Mark this post and the followings unread

i will re-order a batch soon, however, i will have to complete the PS3100 resonator PCB sale first....
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aladan



Joined: Aug 13, 2011
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PostPosted: Tue Jun 05, 2012 9:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
i will re-order a batch soon, however, i will have to complete the PS3100 resonator PCB sale first....
Count me in for a few more when you do... need more VCOs, loving the X-4046 Smile
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Skrog Productions



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PostPosted: Tue Jun 19, 2012 11:27 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Fonik

2 core's & 2 shapers for me please .

Thanks again

Dave.

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Argitoth



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PostPosted: Tue Jun 19, 2012 12:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

I am confooozd... Mad

So, is the PCB available? Where do I send payment? If paypal, what's the address? When will it be shipped? Embarassed
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Skrog Productions



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PostPosted: Tue Jun 19, 2012 2:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

Argitoth wrote:
I am confooozd... Mad

So, is the PCB available? Where do I send payment? If paypal, what's the address? When will it be shipped? Embarassed



Keep an eye on this thread over the next month or so , Fonik says "after the ps3100 boards are all parceled up & posted off , he will order another batch of the vco pcb's , register your number of boards required so he can get a rough idea how many to order from the factory Smile

Dave.

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baudrate



Joined: Mar 19, 2012
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PostPosted: Tue Jun 19, 2012 6:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

I can't wait to build a pair of these!
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Mongo1



Joined: Aug 11, 2011
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PostPosted: Tue Jun 19, 2012 8:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'd definitely be in for a pair of these... Looks great!

Gary
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Oort Cloud



Joined: Aug 02, 2009
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PostPosted: Tue Jun 26, 2012 6:34 am    Post subject: Reply with quote  Mark this post and the followings unread

I'm in for 4 core & 4 wave shapers PCBs.
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tokyomatik



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PostPosted: Tue Jun 26, 2012 5:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

i think i did something wrong with one of my boards.
i desoldered maybe 3 or 4 times the tempco and now the pads are gone, so now on my scope i can see the triangle wave only when i turn the frequency pot at 50% or more, before just flat, the sound is pretty acute on the high high frequencies....i hope i didn't killed all the dogs of the neighborhood with it ...or drive crazy dolphins and bats....Rolling Eyes in wich way i could fix this??
just in case, are there some pcbs available??
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Argitoth



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PostPosted: Sun Jul 08, 2012 3:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

Is it OK to use Mouser # 147-72-104-RC 100n capacitor for VCO and Waveshaper boards?:
C10
C12
C13
C300
C400
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