New DSL40C Odd Thump and Volume Reduction:

Robert Herndon said:
I just haven't had time to take it apart and really examine it. Todd's guitar has taken far more time and work than originally anticipated...
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Just do as Trident said, crank it and let it shake itself out, if you have any of your old tubes from when you changed your other amp pop one into the first slot an kick it’s ass!
 
There are only 4 screws on the back panel, you don’t have to remove the entire chassis to do that, and pop a patch cable in the loop, I have never used it and because of dodgy volume on both of my mosfet’s this was the cure!!
Cheers Mitch
 
So, today, I decided to address the missing logos on my 200 watt Jackson 4x12 cabinets...

20190717_203356.jpg

since a lot of things about my stage gear contain hidden tributes to musical inspirations - the Les Paul a nod to Page, the hat, a nod to Hendrix, the purple band, a salute to Deep Purple - I wanted to add one more salute to a musical inspiration.

I drafted this today and I'm having a 3D, two color plastic logo made that will attach to the front of my cabinet...

How's this???

file (1).jpg
 
Robert Herndon said:
So, today, I decided to address the missing logos on my 200 watt Jackson 4x12 cabinets...

View attachment 28557

since a lot of things about my stage gear contain hidden tributes to musical inspirations - the Les Paul a nod to Page, the hat, a nod to Hendrix, the purple band, a salute to Deep Purple - I wanted to add one more salute to a musical inspiration.

I drafted this today and I'm having a 3D, two color plastic logo made that will attach to the front of my cabinet...

How's this???

View attachment 28558
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Very cool and a nice way to give a bit of homage to a great
Rock and Roll Band
nicely done Robert!
Cheers Mitch
 
Robert Herndon said:
So, today, I decided to address the missing logos on my 200 watt Jackson 4x12 cabinets...

View attachment 28557

since a lot of things about my stage gear contain hidden tributes to musical inspirations - the Les Paul a nod to Page, the hat, a nod to Hendrix, the purple band, a salute to Deep Purple - I wanted to add one more salute to a musical inspiration.

I drafted this today and I'm having a 3D, two color plastic logo made that will attach to the front of my cabinet...

How's this???

View attachment 28558
Click to expand...
Are you hijacking your own thread?
:eek:
 
Robert Herndon said:
Spent a few hours playing this last night - at volume levels a title less than 1/2 - and it acted strangely again but then cleared up and worked fine.

While playing, the volume would rise suddenly, as if a volume pedal was pressed, and then the volume would drop back down.

It did this without any noise and without loss of clarity.

Thoughts???
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Try cleaning the FX loop send/return jack sockets. These can cause problems in many amps. The jack sockets are "switching" types & the switching contacts can get a bit grimey over time leading to problems like this. Another possibility is that the "cathode follower" (aka tone stack driver) tube may be on its way out (V3b). This runs a kinda high "heater to cathode" potential & some new production tubes don't last long in this position. A common sign of this tube failing is a loss of volume. It may possibly be neither of these things, but it's worth a shot. Hope this helps. Cheers
 
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ivan H said:
Try cleaning the FX loop send/return jack sockets. These can cause problems in many amps. The jack sockets are "switching" types & the switching contacts can get a bit grimey over time leading to problems like this. Another possibility is that the "cathode follower" (aka tone stack driver) tube may be on its way out (V3b). This runs a kinda high "heater to cathode" voltage & some new production tubes don't last long in this position. A common sign of this tube failing is a loss of volume. It may possibly be neither of these things, but it's worth a shot. Hope this helps. Cheers
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Very informative advice, I had always ran a jumper in the loop, to keep this type of problem at bay, my mosfets have been running this way because of the same issue Robert had described earlier in this thread!
Cheers Mitch
 
Mitch Pearrow SJMP said:
Very informative advice, I had always ran a jumper in the loop, to keep this type of problem at bay, my mosfets have been running this way because of the same issue Robert had described earlier in this thread!
Cheers Mitch
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Keeping a jumper in the loop keeps the switching contacts "open" so is a cool way to defeat the problem.
I just looked at what I posted yesterday & saw a glaring error. I wrote "heater to cathode" voltage. Well there is no "voltage" present & what I meant was heater to cathode potential. I just edited my post. Apologise. Cheers
 
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