Hello everyone,
I have a 3300hp i told a friend id look at for him *sigh*, he blew it up.
All other functions on the radio work, but had no output, this has 3 irf520's in it, i replaced all 3, have power back, but there is a low tone 3-400hz if i had to describe it, i can hear without a speaker attached, and the output is at max no matter where anything is set, the internal adjustments do adjust the output somewhat, so this "tone" or oscillation is modulating the carrier causing heavy current draw.
ive tried it with no mic attached, same thing. Nothing looks burnt around the finals or driver.
Is this something common for this style radio? and has anyone run into something similar after replacing driver and finals? just thought id ask here before i to dig into this thing, in hopes of saving time.
thanks
I have a 3300hp i told a friend id look at for him *sigh*, he blew it up.
All other functions on the radio work, but had no output, this has 3 irf520's in it, i replaced all 3, have power back, but there is a low tone 3-400hz if i had to describe it, i can hear without a speaker attached, and the output is at max no matter where anything is set, the internal adjustments do adjust the output somewhat, so this "tone" or oscillation is modulating the carrier causing heavy current draw.
ive tried it with no mic attached, same thing. Nothing looks burnt around the finals or driver.
Is this something common for this style radio? and has anyone run into something similar after replacing driver and finals? just thought id ask here before i to dig into this thing, in hopes of saving time.
thanks