Hi,
thanks to all those who replied and discussed this topic, providing me
with a lot of good suggestions.

In the end I might use a BJT/FET oscillator instead, especially if it
works with the ex-CB XTAL of my other post. Troubleshooting with a
receiver and a DVM is fun, but time consuming and often demotivating.

I dream of an oscilloscope as much as I dream of an HF dipole up on the
roof. Hopefully both will come with time, as well as children, a better
wage, ... ;-)

73,
Paolo IK1ZYW