I am new to valves, So obviously I do not understand them.
Having said that, I have been handed a preamp to 'update' (yes some of the parts really do need replacement due to eminent failure).
I believe it is capable of 12v output.
My questions are in regards to c2 3uf/200v film cap.
What voltage does it actually need to handle ?
How much frequency response change would it cause if it was changed to a 2.7uf or 3.3uf ?
Thanks 🙂
Having said that, I have been handed a preamp to 'update' (yes some of the parts really do need replacement due to eminent failure).
I believe it is capable of 12v output.
My questions are in regards to c2 3uf/200v film cap.
What voltage does it actually need to handle ?
How much frequency response change would it cause if it was changed to a 2.7uf or 3.3uf ?
Thanks 🙂
Last edited:
C3 need only be somewhere between 2uF and 4uF, and the value is not critical.
However I would use a 400V part.
However I would use a 400V part.
If your using valves and dont understand them read and inform yourself.tubes are easy to understand and use in comparrison to silicon.
It is good practice to select a capacitor that can withstand the full power supply high voltage. This way, the device connected to the output will not be damaged by a malfunction such as a short circuit inside the valve.
The LF roll-off frequency is linearly related to the C value. Lower it 10% (3.3 to 3) and the LF roll off drops 10%. Etc.
BTW, film caps are extremely stable and typically never need to be replaced.
Spend your money where it counts.
Jan
BTW, film caps are extremely stable and typically never need to be replaced.
Spend your money where it counts.
Jan