Delux Reverb Reissue voltage question

[mitch]

Hi,
First time post but been doing quite a bit of reading here. I did some simple mods on a DRRI (coupling cap change/slope resistor change/removed NFB).

After doing the changes I was going through and taking voltages...every thing looks good to me except for V3 (12AT7 reverb driver) and V5 (12AX7 tremolo).

V3 pin1 & 6 had 424Vdc, pins 3 & 8 had 7.3Vdc
V5 pin1 had 419Vdc & 6 had 370Vdc, pins 3 & 8 had 3.2Vdc


I've never messed with tube reverb/tremolo before but those plate readings looked high to me. Does anyone know around what voltages I should be seeing or if these readings look fine because I don't have a clue. Any help would be appreciated. Thanks!

[Firestorm]

Your schematic says DV voltages can be +/- 20% so plate voltages meet that spec. They're also w/in the historical range for Blackface amps sharing the same preamp circuit. Cathode voltages for the trem circuit seem a bit off. They should vary depending on whether the trem is on or off and Pins 3 & 8 are not supposed to be the same. But getting readings on that circuit to match the schematic never seems to happen. Did you test with all settings exactly the way the schematic tells you? My guess is, you're fine.

[mitch]

Thanks for the reply Firestorm! I don't have an oscilloscope (or any experience with one, I don't do much amp tinkering), other than that I followed the notes. I was concerned about those voltages because they are over the max volts on my data sheets. Won't I be running through reverb drivers more than usual? I guess if Fender designed them to run this high who am I to argue - right?