Hi All
I bought a 6505 112 which was rather cheap.
Person that I bought it off said it had a blown tube.
Amp was bought to be intended as a mod base, as I already have a few 6505s.
Few issues with this amp tho -
Cracked solder joints on few tube sockets (fixed)
Few blown traces on PCB (installed jumper wires)
Burnt resistor ( replaced )
The amp came back to life with volume!
I performed these mods -
1) Replace the 470pF capacitor at C5 with a .0022μF capacitor and a 470KΩ resistor in series
2) Replace the 1nF capacitor at C26 with a .022μF capacitor.
The amp has more lowend - but unresonable amount of gain. I'm talking 2 on lead channel is fuzzy and on 5 it squeels.
on the rhythm channel - there is also too much gain - I know these guys can't do much of a clean tone - but I can't get anything clean.
Can someone point me in the right direction here of where I could be looking at?
Thank you so much!
I need some help with mods I performed on a 6505 112?
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Re: I need some help with mods I performed on a 6505 112?
Great, sounds like your part changes had an effect, although the original parts maybe a better choice. If you use a scope and a sig gen, you could visually see the voltage gains and waveform distortion as you try different parts at different freqs.