Quote:
Originally Posted by Jon1967us
I have a portable Dumont series string set I'm working on that has a blown fuse after the Damper. Aside from figuring out the cause of said fuse failure, I'm trying to source an appropriate replacement.
The part numbers indicate, and the removed original part are rated .3A / 125v.
The confusion arises when I look at the schematic as see the fuse in the path of 255v.
A 125v rating doesn't look sufficient, but maybe I'm interpreting wrong and perhaps the fuse only needs to be rated for RMS being that it's a slo-blo and the schematic voltage is Peak (of a sawtooth wave)
Part Numbers
https://ibb.co/nwrm7jk
Circuit
https://ibb.co/DR1xMkn
Fuse and Holder Pic
https://ibb.co/8PrpSzG
Cat
https://ibb.co/cXFN1md |
Fuses critical rating is current. Voltage is the voltage at which it fails at that current. Fuses have a very small resistance (usually under an ohm) and the by ohms law the fail current may subtly vary with voltage....in practice in most TVs that subtle variance is small enough to be unimportant.
Nice cat.
