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Some interesting stories and reminiscing. Hadn’t seen it posted here yet.

No risk at all, I’d say, other than to your ears. LOL The way the dial works you’ll only get a pinch more volume going from noon to max, you may not notice much difference at all above noon.

The 10/45/90 panel switches are always correct. The difference between pentode and triode on channel 3 45W and 90W is a tone and ‘feel’ changer. Pentode has more lower mids on the tone and triode feels a little different. Power output is the same for either pentode or triode.

Glad you’ve got an easy fix with tube replacement only. I think ‘rectification’ and ‘pentode/triode’ are being mixed up. For the other points: The ‘pentode/triode’ selector for channel 3 only works in 45W and 90W modes. Channel 3 10W mode is hard wored pentode. Mesa confirmed this in an...

Channel 3 in 10W mode is pentode. So maybe there is something up with the channel 3 triode circuit, since that’s the only time there is hum?

No, that's not normal. Maybe put in 2 fresh power tubes? They operate in different modes (triode for 10W and pentode for 25W). do you get any guitar sound out of the amp in 10W mode? Something sounds pretty out of whack I'm sure some of the more technical posters here will chime in with more...

An oldie but a goodie

What does Variac mode on the Mark V run… 90V? I am also curious about EL34s in the VII. Been having too much fun with the stock tubes to change it ip.

What is the purpose of double ganging the MASTER controls like this? Or, why do other amps not do it? Any insights are appreciated.

Just turn around and act like you turned it down then ask if that’s Ok. They’ll invariably give a thumbs up. I thought that is what everyone did? LOL

They are just saying that if you run you channel master high, like at noon, you are cooking the power tubes even though you may not realize it (headphone volume low). So, the negative effects of this is just running the power tubes all out full on, it is not because ’silent mode’ is being used...

Yes, it is OK to just unplug the speaker whenever, no matter what (or maybe nothing) else is connected. That’s been my experience also, no issues so far. The internal load automatically kicks in. So, there is no ‘speaker on’ switch. Either plug a speaker in or don’t! >Can the amp be turned...

Sure, I think what you are asking is possible on the TC and Mark V, for example. But, the extra circuitry of the OUTPUT is still in the signal path. So, from a purist point of view, this isn’t *exactly* the same as just eliminating the OUTPUT circuit altogether. On the Mark V one can hard...

LOL. I was going to suggest that what you're after is in EDGE mode somewhere, but mind the treble and presence. I usually run them about 10:30 give or take when in EDGE. But, I'm no 70's punk expert, either. Glad you found something in CRUNCH!

I’ve had a Mark V for 12 years. Issue with noise just inside the 5 year warranty that Mesa repaired under warranty. Had a reverb issue maybe 2 years ago that was fixed. I have no concerns about keeping it!

I guess what I was saying is that there is no way to deactivate specific footswitch buttons when the footswitch is plugged in. For example, on the Mark V:90 the toggle switches for EQ have 3 positions. ON, OFF and FS. When toggled to ON the EQ is on regardless of the footswitch button being...

It should just work. Check the level dials on the back panel by the HEADPHONE and LINE OUT jacks. Make sure the INPUT dial is set so you get the yellow or green level lights to illuminate when playing. Make sure the OUTPUT level is not at zero (dials by the headphone jack). Do the level lights...

Hi, I’ve discovered that when the amp toggle switches are ON for REVERB, FX and SOLO that the footswitch can still turn these functions off and on. In other words, the toggle switches don’t really keep the function ON at all times. Accidentally hitting a footswitch button will turn things off...

Just saw on Sweetwater they have the JP2C demo, and V:25 and V:35 new at $500 off. Not sure if it is just a sale (unusual for Boogie amps) or they are trying to clear out the pipeline. The JP2C they have on sale is a demo but the V:25 and V:35 are new

Yeah, I could duplicate what you described on channel 3, IIB mode. The gain goes down, down as the dial goes CCW then volume comes up again at about 8:30 and stays constant until 7:00. So, your VII seems to be normal, or ours both are weird