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Grandchuck:
Here is a simple but useful oscilloscope preamplifier.  It has 40 dB gain and a bandwidth near one MHz.  It needs shielding and that is my next soldering project.  I will use double sided PC board material.

Shielding worked a treat. 
kripton2035:
of course my shorty-with-display ! details on the link in the signature... IMG_0686.jpg (1702.48 kB. 4032x3024 - viewed 330 times.)
kripton2035:
also jay-diddy-b esr meter adapter, I made a digital one
jord4231:
Signal tracer


Oscilloscope component tester before and after adding a volt meter
Andrew_Debbie:
Battery powered Buck-Boost --> linear power supply  powering a  455kHz signal generator.

The signal generator is from an old magazine article. The power supply is my design. I've built two of the power supply modules.   The one in the photo is 5V  and 3.3V.   The other runs at 9V paired with a 5V linear regulator.

These 50x100mm modules mount on a 100x100mm plate.   I've got several other of these little 50x100 modules in work. 
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