mesa recto verb solo 50 issues (audio attached)

[seansolar1234]

Hey all,
I was recently recording a band with my mesa rectoverb 50 through a standard mesa 4x12 (using kt77's from jj). I liked the sound we were getting so I cranked the volume to about 5 on both the output and the master where I really liked the sound. As I began recording, all sounded fine until suddenly around 24-25 seconds in the sample attached the amp's lowend basically disappeared.

I took a tech's advice, who said to change all the tubes, so I took all the jj's out of my dual rec that I knew worked and plugged them in. Everything was a bit more precise and clear sounding, but the lowend still lacked a bit too me.


Attached is the audio sample right when the issue started happening...it happened while recording a re-amp track. Also, pleae ignore the qeird edits, I punched in a bunch of times and haven't fixed anything yet, this is just a raw track.


Any ideas what could be happening? Here is the audio: http://soundcloud.com/seansean12345/diagnose

 

[JCDenton6]

Have you checked all your preamp tubes?
If it's not the preamp tubes, sounds like some screen grid resistors may have been damaged.

IT was sounding great before the 24s mark.

 

[cyber104]

Have you swapped to another speaker cable - this happened to our DR one time and it was the cable - drove my crazy swapping tubes to no avail.

Also, Were you plugged directly into the amp or were there pedals/effects involved?

Chris

 

[seansolar1234]

Hey Guys,
Thanks for the input. I called mesa tech support and they said it sounds like a screen resistor as you pointed out. I tried switching both power and all preamp tubes (replaced them with a set I had in the dual rec), but the problem still exists. I haven't tried the cables though...I have a maxon 808 pedal in front, so I will try removing all of that and see what happens.

Is a screen resistor a send-in-for-tech kind of thing?

Thanks again