Building the MST-13 Timers. Buying the Capacitors.

Ok, we have almost everything we need to build the “heart” of the timer!

We have a circuit diagram, the Thuring boards, and quartz from COMPONA AG. We already bought the “24-stage frequency divider” HEF 4521BT.

We now need to buy some capacitors. On 13 August 1985, Lumpert bought two sets of capacitors: 33 and 27 pF, just like he intended when he designed the circuit diagram.

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DP109-1

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Related posts

Building the MST-13 Timers. Let’s get started!

Building the MST-13 Timers. The Thuring Boards

Building the MST-13 Timers. The NYMPH Quartz Mystery

Building the MST-13 Timers. Solving a 30 years Old Mystery.

Building the MST-13 Timers. Let’s keep going! (HEF 4521BT)

Reference

Quartz Crystal (Design Note)

 

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