I bought a 89 model 2205 (used to own 85 model) I have some limited knowledge of electronics and good soldering skills, and a complete paranoid freak about high voltage safety and awareness. I have a DVM fluke model and have worked on my own amps years ago in limited capacity.
This amp has a very bright treble tone but is weak on the lower freq tone. I replaced 3 of the crappy but functional preamp tubes with mullard reissues but not the driver or the output tubes (still bright). The el34s in it are not that old but don't know much about them except they are labeled "the tube amp store" "perfect pair" and number "24".
Based on my previous experience with my old amp, this thing is weak on lower frequencies and too painfully bright. I do not know how to evaluate capacitors but measured the resister values by comparing with the schematic with my fluke meter. R9 is supposed to have a value of 10K but the one in the amp only reads about 200 ohms. All other values are close or dead on. I do not know the function of this resister or if it could be the cause of my problem.
This amp has a very bright treble tone but is weak on the lower freq tone. I replaced 3 of the crappy but functional preamp tubes with mullard reissues but not the driver or the output tubes (still bright). The el34s in it are not that old but don't know much about them except they are labeled "the tube amp store" "perfect pair" and number "24".
Based on my previous experience with my old amp, this thing is weak on lower frequencies and too painfully bright. I do not know how to evaluate capacitors but measured the resister values by comparing with the schematic with my fluke meter. R9 is supposed to have a value of 10K but the one in the amp only reads about 200 ohms. All other values are close or dead on. I do not know the function of this resister or if it could be the cause of my problem.
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