Hello everyone. I have a report due for tomorrow and I am pulling my hair out over this one.
We have a radio that we have to test. Once the initial test is done and the radio has passed, we are asked to change out a capacitor and test the radio again. The capacitor completely kills the radio`s performance so we are then asked to replace the old capacitor. Now we need to explain and prove why the new capacitor didn't work.
Here is the schematic of the part of the radio we are working on:
The capacitor we are replacing is C215 with a 0.01uF. Now, I was able to get some hints from my teacher as to why the new cap ruins the radio and he said it has to do with the reactance. The bandwidth is 350Hz to 5kHz.
My hypothesis so far is that with a smaller capacitor, the reactance goes up according to Xc = 1/(2*pi*f*c). But what I cant figure out is how I can justify the massive difference in the output without knowing the reactance of the coil in T202. Furthermore, what the heck do R215 and C214 accomplish? Do they have something to do with it?
Thanks in advance.
We have a radio that we have to test. Once the initial test is done and the radio has passed, we are asked to change out a capacitor and test the radio again. The capacitor completely kills the radio`s performance so we are then asked to replace the old capacitor. Now we need to explain and prove why the new capacitor didn't work.
Here is the schematic of the part of the radio we are working on:
The capacitor we are replacing is C215 with a 0.01uF. Now, I was able to get some hints from my teacher as to why the new cap ruins the radio and he said it has to do with the reactance. The bandwidth is 350Hz to 5kHz.
My hypothesis so far is that with a smaller capacitor, the reactance goes up according to Xc = 1/(2*pi*f*c). But what I cant figure out is how I can justify the massive difference in the output without knowing the reactance of the coil in T202. Furthermore, what the heck do R215 and C214 accomplish? Do they have something to do with it?
Thanks in advance.