Rick1114
08-22-2008, 04:24 PM
I have a 1957 GA-5 I recently aquired. Of course I been experimenting with tubes and such for it and last night it started sounding a little funny and then wham - it just died. I smelled the scent of burnt components, although no actual smoke or anything.
To make a long story short I replaced all the tubes and the the amp still blows the fuses a second or two after power up. I opened it up & It looks like the amp had a cap job at some point because I saw those shiny blue & white electrolytics in there(actually they were pretty old looking too, but not "vintage"), but noticed the big 'ol 20uf cap said "mallory" on it - that can't be good. Nothing looks "burnt up" though, although I'm going in for a closer look later - it was pretty dark at the time.
Can anyone tell what the next troubleshooting step is? If it's the tranny I'll bite the bullet and go to a tech, but if it's not, this amp is so so simple, I might try this one myself. But I'd like to determine that part first before making a decision.
Thanks,
Rick
To make a long story short I replaced all the tubes and the the amp still blows the fuses a second or two after power up. I opened it up & It looks like the amp had a cap job at some point because I saw those shiny blue & white electrolytics in there(actually they were pretty old looking too, but not "vintage"), but noticed the big 'ol 20uf cap said "mallory" on it - that can't be good. Nothing looks "burnt up" though, although I'm going in for a closer look later - it was pretty dark at the time.
Can anyone tell what the next troubleshooting step is? If it's the tranny I'll bite the bullet and go to a tech, but if it's not, this amp is so so simple, I might try this one myself. But I'd like to determine that part first before making a decision.
Thanks,
Rick