Could someone test their MkV

[Masterof1angel]

and tell me if it squeals when switching from CH.3 To CH.2 with these settings...

gain and treble maxed. Mark one mode, thick mode on, diodes.

I also have reverb on or off, fx loop engaged, bass just above 9 o clock, mids about 4, master below 9, presence, around 4 o clock. but I dont think they matter as much.

It makes a beeeeooooo sound when i switch from ch3 to ch. 2. I checked the tubes for microphonics, replacing them all. I just wanted to see if I never noticed it or if it's not right.

-Angel

 

[Iconoclysm]

From the manual:

5. The GAIN and TREBLE Controls are the most powerful tone shaping controls in each Channel and should be used with taste. They determine much about the attack characteristic and the overall personality of the sound in all the Modes. Many of the great sounds in all the Channels will find these two Controls in their middle ranges. Avoid setting the TREBLE high (above 2:00) when the GAIN is to be set high as this brings about the tendency for a slightly microphonic tube to ring or squeal.

 

[Masterof1angel]

Thanks. I already know that. As we know, the treble hits the drive stage harder, more gain. Setting the gain and treble on the 3rd channel to max however, is fine. The 2nd channel has less gain so if anything gets microphonic it should be the 3rd, or at least it should hint at it. for channel 2, setting past 8 is more common. That's where it starts, with the gain maxed and treble around 8 (3 o'clock) or vise versa. What I'm looking for is someone that actually has the amp to test it and confirm or deny. Thanks!

Yours Truly,
-Angel

 

[#2121313]

Yes it will make a noise.

In fact, it will also make similar noises when switching between 10W, 45W & 90W, this happens on all 3 channels.

You will find that the problem is more noticeable when there is more volume/gain present.

It's just the way it is on the Mark V.

 

[MrMarkIII]

OMFG!!! Diming the treble and gain on a Mesa causes noise and/or tube microphonics problems!
This is a surprise? :lol:

 

[mesa1360]

I also have reverb on or off, fx loop engaged, bass just above 9 o clock, mids about 4, master below 9, presence, around 4 o clock. but I dont think they matter as much.

-Angel

What's the output knob setting?

 

[Iconoclysm]

Thanks. I already know that. As we know, the treble hits the drive stage harder, more gain. Setting the gain and treble on the 3rd channel to max however, is fine. The 2nd channel has less gain so if anything gets microphonic it should be the 3rd, or at least it should hint at it. for channel 2, setting past 8 is more common. That's where it starts, with the gain maxed and treble around 8 (3 o'clock) or vise versa. What I'm looking for is someone that actually has the amp to test it and confirm or deny. Thanks!

Yours Truly,
-Angel

If you're doing this on channel 3, there was a warning in the manual about diming the gain and treble that it could damage the amp somehow.

I wouldn't say setting anything past 8 is common at all, really. I do realize you wanted someone to test that but like I said, the warning.

 

[Masterof1angel]

Yes it will make a noise.

In fact, it will also make similar noises when switching between 10W, 45W & 90W, this happens on all 3 channels.

You will find that the problem is more noticeable when there is more volume/gain present.

It's just the way it is on the Mark V.

I'm not talking about a popping noise. and it only happens on channel 2. It didn't happen before.

 

[Masterof1angel]

double post

 

[Masterof1angel]

OMFG!!! Diming the treble and gain on a Mesa causes noise and/or tube microphonics problems!
This is a surprise? :lol:

I don't need someone to laugh at my questions please, Just someone to test theirs for me please like i said. If you had read my post more carefully, you'd see that I said it only happens on channel 2 mark mode. Since channel 2 mark mode has a lot more bass, it is much more common to dime the treble. Look it up. Anyway, since channel 3 is quiet totally dimed, I can only assume you don't have a mark V to test for me like the subject said. Do you have a MKV? if not, thanks. If so, please test it for me and confirm. Thank you.

-Angel

 

[Masterof1angel]

I also have reverb on or off, fx loop engaged, bass just above 9 o clock, mids about 4, master below 9, presence, around 4 o clock. but I dont think they matter as much.

-Angel

What's the output knob setting?

I didn't put the output since it didn't matter, but it was below 9 o clock. It isn't a feedback problem if thats what you're thinking since it still happens if the 'tar isn't plugged in.
If you could test it, I'd appreciate it!
Thanks
-Angel

 

[Masterof1angel]

Thanks. I already know that. As we know, the treble hits the drive stage harder, more gain. Setting the gain and treble on the 3rd channel to max however, is fine. The 2nd channel has less gain so if anything gets microphonic it should be the 3rd, or at least it should hint at it. for channel 2, setting past 8 is more common. That's where it starts, with the gain maxed and treble around 8 (3 o'clock) or vise versa. What I'm looking for is someone that actually has the amp to test it and confirm or deny. Thanks!

Yours Truly,
-Angel

If you're doing this on channel 3, there was a warning in the manual about diming the gain and treble that it could damage the amp somehow.

I wouldn't say setting anything past 8 is common at all, really. I do realize you wanted someone to test that but like I said, the warning.

Of course not. Your are correct! Please don't dime ch. 3 if you don't feel comfortable. CH. 3 is fine. I only tested it to confirm the "feedback" noise wasn't natural.

As for setting it past 8, you are correct in that most people dime out at around 8 or right before. However, for the 2nd channel, Mark one mode, it is more common since it is very dark even with the bass at zero to have the treble up above 8.


To everyone that doesn't understand, please test channel 2 in mark mode with thick on and treble and gain maxed with diodes. Please tell me if it makes a "beeooo" sound when switching from ch 3 to ch 2 that sustains in a feedback. The guitar volume should be off. thanks!

-Angel

 

[Masterof1angel]

Thanks. As we know, the treble hits the drive stage harder, more gain. Setting the gain and treble on the 3rd channel to max however, is fine. The 2nd channel has less gain so if anything gets microphonic it should be the 3rd, or at least it should hint at it. for channel 2, setting past 8 is more common. That's where it starts, with the gain maxed and treble around 8 (3 o'clock) or vise versa. What I'm looking for is someone that actually has the amp to test it and confirm or deny. Thanks!

Yours Truly,
-Angel

If you're doing this on channel 3, there was a warning in the manual about diming the gain and treble that it could damage the amp somehow.

I wouldn't say setting anything past 8 is common at all, really. I do realize you wanted someone to test that but like I said, the warning.

Of course not. Your are correct! Please don't test it on ch. 3 if you don't feel comfortable. CH. 3 is fine. I only tested it to confirm the "feedback" noise wasn't natural. ch. 3 is very high gain so if the noise was normal, it shoud have done it there too, that was my train of thought.
As for setting it past 8, you are correct in that most people stop at around 8 or before.
However, for the 2nd channel mark one mode, it is more common since it's dark even with the bass at zero. It's the 2nd channel that squeals, in fat mark mode. I'm just trying to get someone to test it for me.

So, to anyone who's interested, please test channel 2 in mark mode, thick on and treble and gain maxed with diodes. If that is too high for you, you can bring the treble down a bit, starting at about 8 it should show signs of squaling. It starts for me with treble after 8 with. Switch from ch.3 to ch.2 and listen for a "beeeooo" sound. The guitar volume should be off. Thank you so much!

-Angel

 

[phyrexia]

There should not be a whooping or hooting sound at all in between channels.

 

[mesa1360]

I also have reverb on or off, fx loop engaged, bass just above 9 o clock, mids about 4, master below 9, presence, around 4 o clock. but I dont think they matter as much.

-Angel

What's the output knob setting?

I didn't put the output since it didn't matter, but it was below 9 o clock. It isn't a feedback problem if thats what you're thinking since it still happens if the 'tar isn't plugged in.
If you could test it, I'd appreciate it!
Thanks
-Angel

I tried it. No squeling or any out of the ordinary noise that would cause concern.

 

[Masterof1angel]

Thank you so much, and God bless you for testing it for me! I finally figured out what the problem was for future searches. I used a mirror to triple check and found I had left a tung-sol in V1 when I had put the mesa 12ax7's back. Believe it or not, when I changed that, it went away. I knew there wasn't any noise before. BTW, it was the tube and not tung sols because after that, I put them all back in and now have 7 noise free tung sols.

-Angel

 

[CudBucket]

From the manual:

5. The GAIN and TREBLE Controls are the most powerful tone shaping controls in each Channel and should be used with taste. They determine much about the attack characteristic and the overall personality of the sound in all the Modes. Many of the great sounds in all the Channels will find these two Controls in their middle ranges. Avoid setting the TREBLE high (above 2:00) when the GAIN is to be set high as this brings about the tendency for a slightly microphonic tube to ring or squeal.

This happens to be printed in every Mesa manual for every Mesa amp I've ever owned: Mark IV, Road King II, Lonestar, F50, etc.