From: farberbear.unspam@aol.com   
      
   On 8/21/2022 6:22 PM, Phil Allison wrote:   
   > David Farber wrote:   
   > =============   
   >>   
   >> Questions about the test setup:   
   >>   
   >> 1. For my 1A, current limited, DC supply, I was going to using my bench   
   >> power supply and set the current limiter to 1A   
   >   
   > ** Good.   
   >   
   >   
   >> 2. For the brief pulse, I was going to use a 1.5 volt, AAA battery.   
   >> Since there's a 38 ohm (internal resistor?) connection between the   
   >> cathode and gate, does that mean the 1.5 V pulse will be automatically   
   >> limited to about 40mA?   
   >   
   > **  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.   
   >   
   >   
   > .....  Phil   
   >   
   >   
   >   
   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?   
      
   Thanks for your reply.   
   --   
   David Farber   
   Los Osos, CA   
      
   --- SoupGate-Win32 v1.05   
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