TTSH (ARP 2600 clone) build notes - Sample & Hold (DIY)

Part no.17 of my TTSH (Two thousand six hundred) build which is an ARP 2600 clone synthesizer. 

SAMPLE & HOLD

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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The ARP 2600 synth used a 4015 sub-module for the sample & hold.

rESISTORS, CAPS, TRANNIES IN

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The sample & hold section on a ARP 2600