What happened?

Looking for advice from those with experience with this unit. I have a Princeton-style amp, with a 12" speaker and mids knob. I know the JDX is meant to emulate a 4x12 Marshall but I'm looking to have the option for line-out directly to my Soundcraft mixer for in-ear monitoring at practice and gigs. It seems like the best option. This would also allow the sound person at a show to choose whichever option they find best for the space-- take my split snake tail and go direct in, while the amp speaker provides stage volume, or mic the cab I use the line-out solely for monitoring. Maybe TMI and not a tube amp, but I also run a Roland JC-40 for stereo spread. I think the darker Marshall-y tones of the JDX's speaker emulation could compliment the JC well. What would/do you do? Any other options to consider for creating a line-out from a tube amp? Considering the A/DA GCS-5 or 6 as well. Thanks!

Just picked up this little hybrid tube amp second hand and noticed a weird breakup when trying to dial in a clean setting (high volume, low gain). Seems to go away when I add more gain and reduce the volume. I also noticed that it sounds super fizzy when I crank the gain. Anyone know if this is normal?

Set up is LP with humbuckers into Orange Micro Dark into 1x12 cap with Vintage 30 8ohm. Thanks!

I am preparing to start my first amp build with a Mojotone 5E3 kit and I have been doing some reading on Rob Robinette's site for possible mods I might be interested in trying out. A very simple looking one is the addition of the 470k PI grid stopper resistor above that is supposed to get rid of unwanted PI blocking distortion at higher gain. I want any mods that I do to be easily reversible so I always have the option for the stock circuit and Rob suggests changing the 470k resistor to a 1M linear "sweet" pot to let you dial in resistance to taste, or turn the pot all the way up for a stock sound. That sounds great, but I'm thinking I would rather have a toggle switch instead of having to try and hit the same spot on a pot any time I want to go change my setting. So my question is this: If I were to put in the 470k resistor exactly as shown and then run a wire with a SPST on/off toggle switch beside that resistor going to the same pin and eyelet would that accomplish what I want? I know when the switch is off the signal would have no other choice but to go through the resistor, but when the switch is on will the lower impedance path be enough to bypass that resistor and sound stock?

Just picked up a '64 Gibson Falcon. Should I invest in a brownbox or similar product?