YEP! And they are supposed to be replaced every 10 years. The very first thing that you do to a vintage Marshall is replace all the caps ASAP, What you are referring to would be the electrolytic caps, not the coupling caps or the caps in the EQ section. and NOT with Orange Drops either!! I'm not sure where "Orange Drops are bad" concept started but that is not true. NO, you're right about Fenders, but the Fenders seem to do a lot better as far as caps go compared to high voltage Marshalls especially 60's and early 70's. The 100 Watt 60's and very early 70's still had over 600 volts hitting the plates on the El34's and it put a lot more strain on the caps as a result, thus wearing them out faster, hence they say to replace them every 10 years. I believe you are confusing coupling caps with filter caps. Marshall started reducing the plate voltages down to 450 volts sometime around 1973. Not sure where you heard this from however this is not true either. I say this with having worked on countless older Marshalls. There's currently a '66 JTM 45 in the shop right now along with a 2 67's and neither amp runs over 465V on the plates of the power tubes. PTP will always be easier to repair out on the road though, and that is saying something if you are constantly on the road and take particular liking to that particular amp. It really depends on the build quality of each amp and the skill level of each guitar tech. A lot of very good amps these days don't have that sensitive touch dynamic as do the PTP amps (where when your pick attack is harder the volume incresese but keeping that awesome tone, and when you pick lightly, the volume decreases, but the tone is still full and rich. This is how they get emotions out of their guitars Touch sensitivity has nothing to do with an amp being PTP or PCB equipped but rather it comes down to how the circuit itself is designed as well as the quality of the transformers. For what it's worth Trace
