Re: 453 calibrator
Why would either BA or BB be a dead short (at ground) to Q1274's emitter? There is a 2.19K resister between the emitter and either BB or BA. I guess what I'm missing is how someone could see a short on the schematic, even if they mis-interpreted the line representing the board's boundary as a wire or trace. I am not an expert, so when someone sees something on a schematic that I don't, I want to know why.toggle quoted messageShow quoted text
Connection BB is probably not needed when everything else is connected anyway, as there are two other ground returns -- the one for the 1 volt BNC output looks redundant to BB, and another 180 ohms kicks-in for 0.1 output. The other involves the current-test loop, and there is another 220 ohms involved.
On 5/9/2018 12:29 PM, Chuck Harris wrote:
No, you aren't missing anything. What Jeff was saying