Hi all.
I recently picked up a dead car amplifier from the flea market, with the intention of learning some more in the area of audio repair.
It has a stereo output with an added mono woofer output. The stereo channels are on one board, whilst the woofer section is on a separate board. There are also three large (ish) transformers.
Apart from the fact that it was seriously dirty inside, it seems to be essentially complete with the only clearly damaged component being a toasted 1/4 watt resistor on the woofer board and it is this which I am wondering how to replace?
I'll post some pictuires if requested, however the resistor in question is in parallel with a 47uF 63v electrolytic.
I won't lie that I'm not familiar with the reason behind using resistors in parallel with caps, but surely, for the cap to have any effect, then the resistance cannot be too low?
That said, is there some kind of calculation that can be used to discover an appropriate value for the resistor, considering we know the value of the capacitor?
Everyday is a school day...
I recently picked up a dead car amplifier from the flea market, with the intention of learning some more in the area of audio repair.
It has a stereo output with an added mono woofer output. The stereo channels are on one board, whilst the woofer section is on a separate board. There are also three large (ish) transformers.
Apart from the fact that it was seriously dirty inside, it seems to be essentially complete with the only clearly damaged component being a toasted 1/4 watt resistor on the woofer board and it is this which I am wondering how to replace?
I'll post some pictuires if requested, however the resistor in question is in parallel with a 47uF 63v electrolytic.
I won't lie that I'm not familiar with the reason behind using resistors in parallel with caps, but surely, for the cap to have any effect, then the resistance cannot be too low?
That said, is there some kind of calculation that can be used to discover an appropriate value for the resistor, considering we know the value of the capacitor?
Everyday is a school day...
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