This is a just a detailed instruction of how I installed my Mercury Magnetics Output Transformer and Choke.
Disclaimer
I am not responsible for anyone’s actions besides my own. If you attempt this using this as a walkthrough and you mess up your amp its not my fault or this sites fault. You should only attempt this if you have read up on safety instructions while inside your amp and make yourself aware of the dangers. I only take responsibility for any spelling errors that may occur in this post, and there will be many. Ok my ass should be covered now enjoy.
Tools Needed
Soldering Iron, Solder, Solder sucker (makes life easier), Drill with drill bit, Phillips and flat head screw drivers, 11/32 socet, 15mm socket or wrench, and 8mm socket, pencil. *Note not everything is pictured*
Get the DSL out
Reoved the back grill, I dont keep mine on so its actually been off.
Test fitted the Choke
Marked where the holes will be drilled
Removed bolts that hold chassis
Located what was to be removed
Dcided to do the output transformer first.
Used 8mm socket with the flat head screw driver to remove the old transformer. Then I unhooked the old wires.
Compaired the transformers.
Super easy instructions provided by Mercury Magnetics
Mercury Magnetics Transformer installed.
Here comes the harder part, the choke. Used the 15mm socket to remove fittings on the rear of the amp, noted by the red arrows. Cut the two zip ties that held the OT wires to the chassis, noted in green. Then moved that PVC out of the way so I could unscrew the PVC board that contained the the resistor R71. This is need to remove the part where I installed the choke.
Unscrewed the screws that held the sockets to this piece and unscrewed it from the rest of the chassis. Then drilled the choke holes.
Installed Choke to the chassis.
Pulled the PVC board that contains the resistor R71 through the top of the chassis so I could unsolder it.
The unsoldering locations for resistor R71 from behind.
Choke wires soldered. Note the red wire, the choke wire wasnt long enough to reach the resistor location so I had to extend them, wasnt very happy about that. But am very happy with its location on the chassis so oh well.
Reassemble and enjoy.
Thoughts
I am very pleased with the results. The amp is way more articulate when it comes to defining notes. Its no where near broken in yet so I cant wait to see the actual final product. I cant really say if the choke helps because I installed them both at the same time. But the amp is very constant in tone. So I would contribute that being the choke. My only regreat is that the do not make a Power Transformer for the DSL50 only the 100. I dont need it but I would like it to all match but once again oh well. I would recomend anyone with a JCM2000 to replace your Output Transformer. Choke is up to you, I still recomend doing the choke. Weber has the best deals on the net hands down on Mercury Magnetics. Hope you enjoyed my install.
******UPDATE******UPDATE******UPDATE******UPDATE******
Below are updated OT installation instructions put together by forum member clutch71:
A couple of users on this forum have upgraded our output transformers with Mercury Magnetic transformers. We all agree that Mercury Magnetics claim that the Axiom Output transformer will, "give you more vivid harmonic overtones, added sparkle, more dynamic headroom, and much better note separation. Even if you’re into weapons of mass distortion!"
With that said, we have noticed two versions of the transformer, yet Mercury Magnetics did not update the install instructions to reflect this.
These are the instructions provided with each tranny
http://img.photobucket.com/albums/v725/ ... ctions.jpg
Properly installed output transformer wiring.
Save the Marshalls OT installed on April 14th, 2007 is on the left and mine installed 1/18/2008 is on the right.
Note: The size difference is due to the distance of the object from the lens.
Here is an image of an improperly wired transformer based on the wiring. It will produce a "farting" tone from the amp
http://i173.photobucket.com/albums/w52/ ... 2acopy.jpg
Cheers, clutch71
