From: jl@glen--canyon.com   
      
   On Thu, 19 Feb 2026 10:39:29 +0100, Arie de Muijnck    
   wrote:   
      
   >On 2026-02-19 05:39, john larkin wrote:   
   > >   
   > > https://www.youtube.com/watch?v=a1_l8Qdsq5A   
   >   
   >Thanks, a nice blast from the past. I build SSB side band filters from the   
   war surplus.   
   >They could be trimmed slightly down by electro-depositing silver on the   
   contact surfaces.   
   >Grinding was much too complex.   
   >   
   >The crystal radio shown in the documentary is wrong - galena is not quartz.   
   >   
   >Arie   
      
   We buy a 3x2 mm smt xo for 59 cents. They are all within about 2 PPM   
   of 16 MHz. That's amazing.   
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)