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How often does it appear? I get something very similar on almost all my tube amps (Mark V35, Dual Rectifier, Mark IV, OR15) at band volumes, when my cellphone is on top or near the amp head. I believe the amp simply receives some of the phone's signal and amplifies it. I just resorted to not...

It is important to see where the problem lies. You should put the amp in extreme mode and see if there is signal coming from the FX send, for example by patching it into the FX return of another amp. Similarly you should plug something into the FX return of the Mark V and see if there is sound...

Hi, I just saw the replies. I tried them again on different computers using Reaper and the pulse IR loader. The signal is attenuated by the IRs by over 20dB so depending on the gain that your IR loader is able to add you may need to crank the gain on the second instance as well or even add a...

Hi, I don't own Logic so I can't try that our. The IRs worked with Pulse and Helix Native for me. Maybe you should try another Guitar Impulse loader like NadIR and report back. For me, I've used it on most of my recrodings since I came up with the idea and never had any problems. I hope you...

Based on the headphone test the guitar electronics were pretty much ruled out. The next question would be if the instability is occuring in the preamp or poweramp. For that you can check if turning down the presence control gets rid of the issue. If it does that indicates a problem in the...

Okay, the fact that it is present in headphone operation also rules out the guitar electronics pretty much. Some part of the circuit is running beyond stability and oscillating. As I do not expect Mesa to design an amp that way, there could be a component like a capacitor or resistor that got...

You can put a pedal/multifx with a volume knob in the loop and turn it down to get the same effect as with the output volume knob on the 90W. I used this method with my v35 and it worked well at bedroom volumes.

Hi, I also use a Mark 5 35 and had similar squealing issues. I used a 412 traditional recto cab with it and also used similar settings as you do. First of all, what cab do you use and how large is the room you are playing in? When doing it in a really small room with these amounts of gain...

A is wrong and can harm your amp. B is correct but unnecessary and C ist also correct. In both B and C the two speakers will be run in parallel to make a total load of 4Ohms. The difference is just the place where they are connected. They will both sound identical but B will need one more...

Hi everybody, I am fairly new to the board but I just read this thread and the schematics of the tremoverb. I located the components in question. Everything I say is referencing this schematic...

While I don't have a 2ch recto, I am an engineer and also had a look at the schematics. The orange Channel is wired incorrectly for sure, as the left lug and the middle lug are jumpered. Imagine a potentiometer as a fixed resistor. The outer lugs connect to the ends of the resistor while the...

Hello everyone, I have been reading this forum for a while and today I decided to create an account. I want to share a cool recording trick that I figured out. It works for Mark 5:25, Mark 5:35, JP2c, TC50 and TC100. I've been playing a Mark V 35 for over 2 years now and love the tones I get...

I know the thread is old but I might have an answer to that issue. Recently (before COVID) my Band started recording our rehearsals. The drums are fully miced and the bass player and I are running XLR outs from his Darkglass Alpha Omega 900 and my Mark V 35. He is running custom made 115 and...

Hi, I had the same problem on my Mark V 35. At first, it did not always appear but it started when I got a text and my phone was placed on my amp. Over time it got worse and really annoyed my band and me. I had to switch to standby between songs during rehearsal. My first attempt was putting...