ADA Depot - A Forum To Support Users of ADA Amplification Gear

ADA Preamps => Original MP-1 => Topic started by: Chip Roberts on January 04, 2018, 09:45:36 AM

Title: Replacing output volume pot and rear output jacks
Post by: Chip Roberts on January 04, 2018, 09:45:36 AM

Exactly as the topic heading states, I'm replacing the output pot on the front end of the MP1 and the rear output jacks.  Any recommendations on brands or even specific models you guys have used in the past?

Title: Re: Replacing output volume pot and rear output jacks
Post by: Kim on January 04, 2018, 10:10:33 AM

Myself, I don't even bother with using stock-style plastic frame jacks for the Outputs on the back.  I just use the standard open-frame jacks mounted to the rear panel with insulating washers.  Then they are wired to the circuit board.  A little tighter fit but it does work.  iirc there's a Mod Doc about it but if you can't find it I can get that for you later this evening.

Title: Re: Replacing output volume pot and rear output jacks
Post by: Chip Roberts on January 04, 2018, 12:25:11 PM

That would be super helpful.  I'm not going to do anything fancy, the unit just needs some TLC.  It would not be a very prudent idea to have my backup in worse condition than my main  :facepalm:

Title: Re: Replacing output volume pot and rear output jacks
Post by: rabidgerry on January 04, 2018, 12:49:27 PM

I did the rear input mod on my first MP1 (it sounded like  :poop: that thing so it's as well I sold it  :thumb-up:).

I replaced the front input with a switchcraft knock off guitar input, wired it to the board then ran wires to the back input.  The front one was switching so it would shut off the rear anytime a jack was plugged into the front.

Here is a guide which might help, it looks different from the guide I followed to be honest,  looks more in detail

http://adadepot.com/mods/ADA_MP-1_v1.xx_Rear_Input_Jack_Conversion_Mod.pdf (http://adadepot.com/mods/ADA_MP-1_v1.xx_Rear_Input_Jack_Conversion_Mod.pdf)

MJMP can tell you the exact stuff you need.

Funny my stock MP1 input is still alive and kicking lol crazy.

This mod influenced my to do my own mod on my Boss GT5 and replace a shit microphonic inut with a sturdy cliff socket.  It didn't fit to the pcb so you flip it round and have the tabs in the air and solder wires to them accordingly to the pcb itself, just like the input mod.

Title: Re: Replacing output volume pot and rear output jacks
Post by: Chip Roberts on January 04, 2018, 01:03:03 PM

Any suggestions/tips for replacing the front output pot?

Title: Re: Replacing output volume pot and rear output jacks
Post by: rabidgerry on January 04, 2018, 02:55:55 PM

Quote from: Chip Roberts on January 04, 2018, 01:03:03 PM

Any suggestions/tips for replacing the front output pot?

yeah, any pot will do that is 50k.  MJMP give me this one.  see attached

Title: Re: Replacing output volume pot and rear output jacks
Post by: Chip Roberts on January 04, 2018, 03:19:12 PM

Thanks guys!  Gonna crack it open this weekend and start fixing away.  Well, I won't do it, a man will, but I'll supervise!

Title: Re: Replacing output volume pot and rear output jacks
Post by: Kim on January 04, 2018, 04:02:45 PM

Here's some info I have.  It's old info and YMMV about the part numbers and such actually being current or not. 

Mouser Electronics: http://www.mouser.com 

All Electronics: http://www.allelectronics.com 


MP-1 Rear Jacks (Stock-style plastic casing Output A, Output B, Effects Send, Headphone):   Mouser Part #16PJ509 

50k Dual Linear PCB Mount, 6mm Shaft Pot:   All Electronics Part #DLP-50K  (No Longer Valid)

Attached is the Output Jack Mod rtf file.

Title: Re: Replacing output volume pot and rear output jacks
Post by: Kim on January 04, 2018, 04:05:11 PM

Pics from the Output Jack Mod document: