Got a friend's amp on the bench, looks like the screen resistors need replacing after a possible power tube failure. Can anyone confirm the value and type of the screen resistors? I intend to call fender/evh support monday morning, but the sooner I can get this wrapped up the better. Assuming no bands have been discolored or burnt off (only three bands?), it looks like the resistors are 900 Ohms, which strikes me as a hair low. Probably flameproof or flame-retardant based on the 6L6 and EL84 5150 schematics I've found so far, probably a few watts in rating. My initial thought is that 1k 5W wirewounds should do the job fine, but my friend would like the stock fender values if possible.
Also, if anyone has a schematic for the 50W EL34 5150 III, it would be very much appreciated. The 6L6 version gets the job done for the most part, but there are still differences (e.g., screen resistors).
Picture is of the one resistor that hasn't gone open-circuit. Measures around 1.2k if I recall, though given the board looks a little toasted around it, I don't wholly trust it and intend to replace it since it's <$1.
I found this video that shows the output section board, but the resistor values look pretty wacky... Either 89R or 900M.
Thank you for any input.
Also, if anyone has a schematic for the 50W EL34 5150 III, it would be very much appreciated. The 6L6 version gets the job done for the most part, but there are still differences (e.g., screen resistors).
Picture is of the one resistor that hasn't gone open-circuit. Measures around 1.2k if I recall, though given the board looks a little toasted around it, I don't wholly trust it and intend to replace it since it's <$1.
I found this video that shows the output section board, but the resistor values look pretty wacky... Either 89R or 900M.
Thank you for any input.
