Are there companies that still fix/repair old 80s preamps?

[Matt300ZXT]

I used to have a nice collection of preamps but read at one point that no one was working on, modding, repairing, etc old Marshall JMP-1s or ADA MP-1s anymore. There is a mod shop that's been around forever and can't remember their name, but they are/were big. They said they weren't doing mods on those old preamps anymore due to availability of parts, etc, so I sold both of mine while they still worked. I figured it was better to sell them when they worked and were worth more, rather than holding on to them and they die down the road, and are essentially worthless.

Anywho, I see plenty of both of those preamps being sold and still working, so I'm curious....are there shops or individuals who can still work on or maintain them in case I want to go buy one?

 

[griff10672]

they should just fall under the same realm as amp repair ........ or if it's solid state .... same thing as fixing a pedal to a degree

 

[Matt300ZXT]

they should just fall under the same realm as amp repair ........ or if it's solid state .... same thing as fixing a pedal to a degree

Well I'm talking about parts other than just resistors and diodes. If there are any parts that aren't as common in them. I've never done anything in mine other than swapping tubes so I don't know how complex the circuits or digital stuff is.

 

[MTS]

all roads lead to jaded faith.rob is a fucking DON
or
try fja i think he's back in biz
he can fix anything