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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 123,041 of 124,925   
   Phil Allison to David Farber   
   Re: Scumacher 1042A-PE battery charger h   
   21 Aug 22 21:28:07   
   
   From: pallison49@gmail.com   
      
   David Farber wrote:   
   ================   
   > > ** It can be much higher as the resistor is in parallel with the device   
   gate and cathode.   
   > >   
   > >> 3. How do I clamp the 12V supply to +1.2 volts?   
   > >   
   > > ** The SCR will do that when it triggers on - if it is working.   
   > >   
   > >   
   > >   
   > Assuming the SCR is working and it's clamping properly, where am I to   
   > measure the 1.2 volts? The anode is connected directly to the 12 V   
   > supply and the cathode is grounded. That leaves the gate. Will it   
   > measure 1.2 V after I remove the 1.5 V supply?   
      
   ** Read my first post again.   
      
   SCRs, once triggered, conduct large currents with small voltage drops.   
      
      
   .....   Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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