What does this capacitor do?

[kfs90]

I see a cap on this Ceriatone diagram from the 500mA fuse to ground, but it isn't there on this Triode diagram. Can someone tell me what the purpose of it is on the Ceriatone and why it isn't on the Triode?

[PRR]

> Can someone tell me

No. I can't see why.

But also note that one fuses the high side, the other fuses the ground leg. There are probably other differences. Each designer has different preferences. I suggest you not be looking at both when you actually wire.

[shooter]

Is it just for spike suppression when flipping outta stby?

[sluckey]

I hate those ceriatone drawings. They make you waste time looking for stuff that should be obvious.

[kfs90]

Thanks. It makes sense about the popping when switching the standby.

What about the diodes on the rectifier tube. The Ceriatone has them and a cap; the Triode doesn't. What's the purpose? At this point, I'm likely going off of the Ceriatone, because my transformer markings are a match for that diagram.

[shooter]

What about the diodes on the rectifier tube

I'm a schematic guy, so...my guess they are in case the rec tube goes south, the amp won't go with it?

[HotBluePlates]

What about the diodes on the rectifier tube. The Ceriatone has them and a cap; the Triode doesn't. ...

The JTM45 built by Marshall in the 60's didn't have them either.  Ceriatone is adding modifications to the original circuit.

What about the diodes on the rectifier tube. ... What's the purpose? ...

If the rectifier tube shorts from plate to cathode, the solid-state diodes will have already pre-rectified the voltage.  Amp continues to play as if nothing happened, although d.c. output voltage will be a little higher.

... At this point, I'm likely going off of the Ceriatone, because my transformer markings are a match for that diagram.

It will be to your benefit to learn to translate layout and schematic diagrams so you can visualize using any part-in-hand in the circuit, as appropriate.

[kfs90]

Thanks a mil, everyone! I appreciate you all.