Just opened up my EVH 5153 100W to look for tubes gone bad. Going by the weird crackling and hissing, most likely its one of the preamp tubes. In the process, found out that one power tube was about to go (glowing very intensly, small burn mark on the back of the glass).
I was comparing the tube layout sticker on the inside of the amp to the PCB layout drawing that came with it, and then comapred it to official documentatino available online. Something doesn't add up.
This is the tube layout, according to the schematic and EVH webpage:
And here's what's on the inside of the head shell:
Front row has been flipped around. According to the sticker, that is.
I was comparing the tube layout sticker on the inside of the amp to the PCB layout drawing that came with it, and then comapred it to official documentatino available online. Something doesn't add up.
This is the tube layout, according to the schematic and EVH webpage:
And here's what's on the inside of the head shell:
Front row has been flipped around. According to the sticker, that is.
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