From: liz@poppyrecords.invalid.invalid   
      
   Cursitor Doom  wrote:   
      
   > On Wed, 14 Jan 2026 11:30:29 +0000, liz@poppyrecords.invalid.invalid   
   > (Liz Tuddenham) wrote:   
      
   [...]   
   > >The capacitance I am suggesting is in series with the signal to stop any   
   > >DC from getting into the test amplifier.  The capacitance quoted for   
   > >oscilloscopes and probes is the shunt capacitance from signal to earth.   
   > >You could use an oscillocope probe if you have one with a suitable plug,   
   > >but interpose a 10nf capacitor between the probe tip and the point in   
   > >the circuit you are measuring, so as to block any DC.   
   >   
   > Oh dear. Here's the probe I made up today. Can you spot where I went   
   > wrong? Sigh.....   
   >   
   > https://disk.yandex.com/i/fzGLE2MZltBpQQ   
      
   Yes.   ...Sigh.   
      
   ...but easily put right.   
      
      
      
   --   
   ~ Liz Tuddenham ~   
   (Remove the ".invalid"s and add ".co.uk" to reply)   
   www.poppyrecords.co.uk   
      
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