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|    sci.electronics.repair    |    Fixing electronic equipment    |    124,944 messages    |
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|    Message 123,039 of 124,944    |
|    Phil Allison to David Farber    |
|    Re: Scumacher 1042A-PE battery charger h    |
|    21 Aug 22 18:22:26    |
      From: pallison49@gmail.com              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              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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