I forgot to post pictures of the circuit before it gets wrapped/protected.

The construction is really easy and the parts cost is negigible. Beginners can make their own circuit for a few dollars at most.

The 1N60 could be confused with bland 1N4148 but their characteristics are different. The really lower voltage drop is essential to make this work !

Soldering the wires was more delicate though. The coax' core is fragile, a single thin strand that breaks easily. The board must be physically rugged.

The first attempts were inconclusive : I saw a 32KHz signal hashed by 1KHz blanks. The diagnosis was easy to reach : the DS32KHZ needs a bit more current than I thought. I dug again in my parts collection and chose 3 SMD 47µF /6V capacitors (that's about 20µF effective at 3.5V)

Here it is, with the added capacitors, outputing a solid 3.6V square wave:

Now this thingie is used to tune a Germanium-based Xtal oscillator. Let's say it's very convenient !

And the wires are long enough to reach the other side of the scope, where the external trig input is located.