Wednesday, 23 July 2014

TTSH - The Human Comparator - ARP 2600 Replica - VCO 2

This is part 5 of my TTSH (Two thousand six hundred) build.
You can see my full build thread HERE
There are two awesome TTSH threads in Muffs.
2600 clone - Two Thousand Six Hundred (TTSH)
and
Two Thousand Six Hundred (TTSH) Project General Build Thread
The DSL-Man site has a very good TTSH thread
And of course the official build thread is here
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VCO 2
The 2nd VCO has four waveforms: sine, pulse, saw, ramp.
It's my favoutite VCO

 Rear panel view

Front panel view for VCO 2

First install resistors, IC sockets, MTAs if you like.


Install trim-pots, caps, etc.

 2N3954 TRANSISTOR
This is a ultrarare transistor.

3.5mm jacks The one on the left is from Thonk.

The PJ301BM jack from Thonk on the left is ideal for the TTSH project.
The one on the right is a standard (modified my me) 3.5mm jack.
It's simpler just to get the ones from Thonk.

The jack needs to be installed on the sine VCO. Then test with your scope for the relevant waveforms.

You will need a 2N3906 & 2N5172
The 2N3906 a common PNP bipolar junction transistor.
The 2N5172 is a NPN. 

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