Lucky
New Member
Hey everyone, I'm new to this forum, actually this is my first post. I have a 100 Watt Master Volume JMP head that works fine. But the tone is just nowhere near as wonderful as it was when I got it. So let me explain...
I bought this head about 4 years ago off of e-bay. When I got it there was no problem with it and it sounded great. Now, I play hard rock music locally so I wanted more gain. I did some researching and saw countless mods, but I didn't want to mod this head. So I found the next best thing which is a Soldano Hot Mod that fits right into the second preamp socket. Once I did this, the amp turned into a monster! It sounded incredible and there were no issued for about 6 months. I also retubed it and had it biased when I first got it.
Around the 6 or 7 month of constantly gigging with this thing almost every weekend, I took it to a show plugged it in and it blew a fuse. Now I have used Marshall amps for about 17 years, so I figured that the tubes were pretty much done so I took it to the shop the next day and had them retube it again, just to find out that the problem was the power transformer was gone. Well I asked the tech to go ahead and order the new one, and check all of the components to make sure everything was good. He called me up a couple of weeks later and said it was fixed and to come and get it.
When I got it back he had told me that he had replaced a few things aside from the transformer. Now, you have to excuse my ignorance when it comes to electronics because I really don't know much about it. So he tells me that all of my filter caps were toast so he replaced them all. And for those of you that don't know, a master volume JMP has 6 of them. Now I remember the blue ones that were in it before I put it in the shop, and when I got it back, I had Black ones made by JJ that were roughly half the size of the originals. He also had replaced these little electronic pieces that are soldered on each power tube socket, and said the old ones did'nt match the ohms they were supposed to have. Like I said, Ignorance! HA! The original ones were shaped like a bigger diode (I think) and the new ones where rectangle. That was all and I have never had a problem with this guy or the store he woks for before, so I took him on his word and took it home.
A couple of days later, i took it to practice and it played fine. But it was a little thinner sounding in the mids and the highs are really piercing. So I adjusted to EQ setting to accomidate but it still lacked the ass that it used to have. But I didn't take it back to the shop because I figured that they were new parts and had to be broke in.
Well, I have gotten somewhat used to the tone until started reading up on these amps on different forums. And if I understand this correctly, all of the things that were replaced will affect the overall tone. Is this in fact true, or should I just quit my bitching? Any help will be greatly appreciated.
Thanks a lot,
Lucky
I bought this head about 4 years ago off of e-bay. When I got it there was no problem with it and it sounded great. Now, I play hard rock music locally so I wanted more gain. I did some researching and saw countless mods, but I didn't want to mod this head. So I found the next best thing which is a Soldano Hot Mod that fits right into the second preamp socket. Once I did this, the amp turned into a monster! It sounded incredible and there were no issued for about 6 months. I also retubed it and had it biased when I first got it.
Around the 6 or 7 month of constantly gigging with this thing almost every weekend, I took it to a show plugged it in and it blew a fuse. Now I have used Marshall amps for about 17 years, so I figured that the tubes were pretty much done so I took it to the shop the next day and had them retube it again, just to find out that the problem was the power transformer was gone. Well I asked the tech to go ahead and order the new one, and check all of the components to make sure everything was good. He called me up a couple of weeks later and said it was fixed and to come and get it.
When I got it back he had told me that he had replaced a few things aside from the transformer. Now, you have to excuse my ignorance when it comes to electronics because I really don't know much about it. So he tells me that all of my filter caps were toast so he replaced them all. And for those of you that don't know, a master volume JMP has 6 of them. Now I remember the blue ones that were in it before I put it in the shop, and when I got it back, I had Black ones made by JJ that were roughly half the size of the originals. He also had replaced these little electronic pieces that are soldered on each power tube socket, and said the old ones did'nt match the ohms they were supposed to have. Like I said, Ignorance! HA! The original ones were shaped like a bigger diode (I think) and the new ones where rectangle. That was all and I have never had a problem with this guy or the store he woks for before, so I took him on his word and took it home.
A couple of days later, i took it to practice and it played fine. But it was a little thinner sounding in the mids and the highs are really piercing. So I adjusted to EQ setting to accomidate but it still lacked the ass that it used to have. But I didn't take it back to the shop because I figured that they were new parts and had to be broke in.
Well, I have gotten somewhat used to the tone until started reading up on these amps on different forums. And if I understand this correctly, all of the things that were replaced will affect the overall tone. Is this in fact true, or should I just quit my bitching? Any help will be greatly appreciated.
Thanks a lot,
Lucky
