Why do you need a calculator if you are just measuring voltage? Oh, are you wanting to know how much current is flowing?
Here's an analogy. Your car only carries you to the store. It doesn't go in and get the groceries, too. But the car does one thing pretty well as it's designed to do. You have to do the rest.
So then the next experiment in EL-101 will be to open the connection at the ground point, leaving the sense resistor in place. Place your ammeter in series and read the current value directly, then compare that to the calculated value you did in yesterday's lab experiment. You might be surprised at the result. We'll leave that mystery for tomorrow's lab to discover the reasons why the two results might baffle the new student.
And now the power supply! I should really charge myself more for this. No more drawing on jpgs with mspaint!
On the topic of bypass caps, since now we're into the power supply, what's everyone's opinion on them? C17/18, C26?
Also, in the bias supply, there used to be a transistor between the trimmers RV1 and RV2 and C27-30, Those can probably safely be a single capacitor, like a .47, right?
On the topic of bypass caps, since now we're into the power supply, what's everyone's opinion on them? C17/18, C26?
Also, in the bias supply, there used to be a transistor between the trimmers RV1 and RV2 and C27-30, Those can probably safely be a single capacitor, like a .47, right?
A second question, if anyone knows anything about opamps, does U1 need to be an op176? I've read a bit about their now sadly obsolete lives, and it seems like a fancy audio opamp, but we don't need fancy audio opamps in an hv supply, do we? Anyone know of any alternatives for a 176 in a spot like this?