So we opened up Matt's Mod50 lastnight. Nice guts!

RockStarNick

Active member
Should have taken pics, but all I can say is very nice work!!! Super neat and clean in there. Tidy wiring. Nice solder joints. Nice big capacitors! I don't know what half that crap does in there, but it looks great. It makes you feel good about your big-dollar purchases, when you actually see the guts of the amp, and they look impressive.

I swear, some of those 3K+ point-to-point amps look absolutely horrific inside. Just a total rats nest of loose wires and hanging caps and all sorts of nonsense. I know that PTP is "bloozy mojo" to the extreme, but it just looks like a disaster.
 
Yeah the amp is really clean inside. Super nice work.

Unfortunately, this was a failed attempt to get a power LED lighting up again and to resolve a MIDI glitch. Neither worked :(
 
EWSEthan":fmbku88w said:
Yeah the amp is really clean inside. Super nice work.

Unfortunately, this was a failed attempt to get a power LED lighting up again and to resolve a MIDI glitch. Neither worked :(

whats the midi glitch
 
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.
 
EWSEthan":1apgzv8k said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.


have you tried other midi controllers?
 
Casey Hanson":z4hainax said:
EWSEthan":z4hainax said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.


have you tried other midi controllers?

No, I use the Eggie controller. But so does Nick and I dont think his head does this.
 
EWSEthan":fhvgijg0 said:
Casey Hanson":fhvgijg0 said:
EWSEthan":fhvgijg0 said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.


have you tried other midi controllers?

No, I use the Eggie controller. But so does Nick and I dont think his head does this.


it'd be interesting to try your controller in nick's amp and see..
 
EWSEthan":2athsd6d said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.

Mine does this too. I don't mind it too much, but when I hit standby, off or on, it pops very loudly. That bothers me a bit. Anyone elses do this?
 
bscfo1":ym4ijz2q said:
EWSEthan":ym4ijz2q said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.

Mine does this too. I don't mind it too much, but when I hit standby, off or on, it pops very loudly. That bothers me a bit. Anyone elses do this?

Yes, I also get the pop. I agree that its not a big issue, but in the rare instances we play multi-set shows it can be a small issue. I play 90% of the time on my high gain rhythm sound (module 2, channel A). So, after a set, I put it in standby. Then, once when I came back (and went from standby to on) I thought I was ready to rock but ended up starting the first song of that set on the clean channel!!!
 
EWSEthan":3mw6tpim said:
bscfo1":3mw6tpim said:
EWSEthan":3mw6tpim said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.

Mine does this too. I don't mind it too much, but when I hit standby, off or on, it pops very loudly. That bothers me a bit. Anyone elses do this?

Yes, I also get the pop. I agree that its not a big issue, but in the rare instances we play multi-set shows it can be a small issue. I play 90% of the time on my high gain rhythm sound (module 2, channel A). So, after a set, I put it in standby. Then, once when I came back (and went from standby to on) I thought I was ready to rock but ended up starting the first song of that set on the clean channel!!!

Matt - I PM'd Jeff on this and he said that Bruce was looking into it. I agree that is a nuisance, and the popping I get it so loud (even on a clean channel) that it sounds like it will eventually hurt the speaker. The MIDI switching default to channel A module 1 has always been there, but this loud popping is a new thing.
 
bscfo1":252i0ka1 said:
EWSEthan":252i0ka1 said:
bscfo1":252i0ka1 said:
EWSEthan":252i0ka1 said:
When I turn the amp on, it selects channel A of module 1. Then, lets say I use the footswitch and activate channel A of module 2. Then, I turn from standby to on. It will go back to channel A of module 1. Its not a huge deal but its a little annoying. The great guys at Eggie sent me a newer version of the midi chip to try but it must be something else because it still works the same as before.

Mine does this too. I don't mind it too much, but when I hit standby, off or on, it pops very loudly. That bothers me a bit. Anyone elses do this?

Yes, I also get the pop. I agree that its not a big issue, but in the rare instances we play multi-set shows it can be a small issue. I play 90% of the time on my high gain rhythm sound (module 2, channel A). So, after a set, I put it in standby. Then, once when I came back (and went from standby to on) I thought I was ready to rock but ended up starting the first song of that set on the clean channel!!!
\

Guys, my Mod 100 used to do both of those things, midi glitch and pop really loud going to standby. Bruce instructed me on which component to swap out to remedy the pop. I was set to do it but ended up taking the head to him anyways to do some work on it. The MIDI glitch was the midi chip but it only ever acted up when using the 4 button footswitch. When I used a differenct foot controller, Midi mate, GCP, it did not do that. Jeff and Bruce should be able to get you taken care of no problem with both issues.


Matt - I PM'd Jeff on this and he said that Bruce was looking into it. I agree that is a nuisance, and the popping I get it so loud (even on a clean channel) that it sounds like it will eventually hurt the speaker. The MIDI switching default to channel A module 1 has always been there, but this loud popping is a new thing.
 
Thanks for the reply on this. I've been turning the master volume on the amp down to keep the popping at a minimum for now. I don't know much about electronics, but I'd be willing to change that chip out if they'd send it with some instructions. This just doesn't sound like something I can ignore and pass off as a little idiosyncrasy that my amp has.

But this thing sounds so great.

Sometimes when I'm playing a gig and I forget to turn it down before I hit standby, Bam! Holy crap!
 
They actually sent me the chip and I think I replaced the right one, though Im not 100% sure. It looked about the same as the one they sent me. Anyway, I didnt break anything I dont think and the pop and glitch remain the same.
 
The problem is not the chip if they have a loud pop
along with the channel switching issue. It is the standby switch arc
suppression capacitors. Which means they are going bad and need to be replaced.
 
Jeff Hilligan":mc0luk4g said:
The problem is not the chip if they have a loud pop
along with the channel switching issue. It is the standby switch arc
suppression capacitors. Which means they are going bad and need to be replaced.

Is this easily replacable by mere mortals?
 
EWSEthan":w7gfseih said:
Jeff Hilligan":w7gfseih said:
The problem is not the chip if they have a loud pop
along with the channel switching issue. It is the standby switch arc
suppression capacitors. Which means they are going bad and need to be replaced.

Is this easily replacable by mere mortals?
All depends on the mere mortals :lol: :LOL:
 
Jeff Hilligan":2hnf5k16 said:
The problem is not the chip if they have a loud pop
along with the channel switching issue. It is the standby switch arc
suppression capacitors. Which means they are going bad and need to be replaced.

This sounds like something I shouldn't try to fix on my own. Am I going to have to live with this too? Or take it to someone to have it fixed? How much will this cost me?
 
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