AMS--Soldering 101 class--the swamp deepens........

Can AMS teach eSGEe to solder?

  • BUWAHAHAHAHAHAHA, no....just......no

    Votes: 3 10.7%

  • Maybe, but its gonna hurt

    Votes: 9 32.1%

  • why when its easier to buy Hackmaster or Drumoid sammiches and have them do it?

    Votes: 7 25.0%

  • duct tape is the new solder

    Votes: 3 10.7%

  • Hey BRIAN look eSGEe can SOLDER!

    Votes: 4 14.3%

  • teach the giraffe to solder its faster

    Votes: 8 28.6%
  • Total voters
    28
mcblink said:
AMS.....Or anyone else ballsy enough....

Here's a little job I'm nervous to do myself....

I need to replace these
View attachment 45156

On this tiny little thing

View attachment 45157

But I'm scared to mess up, because that little PCB is no longer made...I don't want to damage it accidentally

How difficult is this really? I'm nervous about it lol
Click to expand...

Cut the existing 3 legs of the pot, with a sharp pair of precision cutters.
Cut all 3 legs off one at a time, and remove the pot from the board. Cut through the plastic.
Do not try to UN-solder all 3 legs at the same time.

Chop carefully, like a surgeon cutting legs, for the very first time. Like a sur ur ur ur gion.....................

CHOP.png

Now all that remains is the 3 separate legs soldered to the board.

1592933105442.png

Brian the solder duck.png
 
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Amp Mad Scientist said:
Cut the existing 3 legs of the pot, with a sharp pair of precision cutters.
Cut all 3 legs off one at a time, and remove the pot from the board. Cut through the plastic.
Do not try to UN-solder all 3 legs at the same time.

Now all that remains is the 3 separate legs soldered to the board.

View attachment 45166
Click to expand...
Then I just solder the new legs to the leftovers of the existing legs?

Brilliant!

Thanks dude!
 
Mitch Pearrow SJMP said:
That looks like the same one I learned on, with model trains and slot cars.
Pops had it in the garage, didn’t learn the fine art of tinning and flux til much later , ha ha
Adrian you will be fine.
Cheers
Click to expand...

I learned about tinning from a friend who wanted me to fix his Strat. He showed me tinning wires before going to attach them.
He later went blind, so it sure helped him that I took the ball and learned more soldering as I wound up fixing numerous guitars and amps for him over the years.
 
mcblink said:
AMS.....Or anyone else ballsy enough....

Here's a little job I'm nervous to do myself....

I need to replace these
View attachment 45156

On this tiny little thing

View attachment 45157

But I'm scared to mess up, because that little PCB is no longer made...I don't want to damage it accidentally

How difficult is this really? I'm nervous about it lol
Click to expand...

Get one of those blue solder suckers like Chili posted. Those trim pots will come right off.
 
My other plan was to buy the pots, and remove the bias board, and take the whole thing to someone else who isn't nervous about screwing up the board...
On this particular amp, all the work so far has been done by myself...it's kinda become the one that I learn myself lessons with lol
I'm not scared of learning some lessons, but only if I can fall back on "well I guess I'll be buying a new ______ now"
Since that board isn't made anymore though, I'm a little apprehensive about putting a hot tip near it lol
 
mcblink said:
Care to elaborate?
Does this just make it easier to remove the legs in a more safe manner so as to expose the board to as little heat as possible, or...
What?
Click to expand...

Yes

Heat the connection gently.
Push the cut leg straight out of the hole from the pot side.
Lift the cut leg straight out of the hole while heating the connection with needle nose plyers..

BENT LEGS of components, soldered to the board: Many legs are bent 90 degrees before soldering.

DO NOT try to heat the board, and UN-bend the leg from the solder side.
DO NOT try to UN-bend the leg.
Instead: PUSH the leg STRAIGHT out of the hole from the POT SIDE. without UN-bending the leg on the solder side.

BENT LEGS: Unbending the leg can damage the circuit board. Never try to remove components by UN-bending the legs.
 
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Amp Mad Scientist said:
Yes

Heat the connection gently.
Push the cut leg straight out of the hole from the pot side.
Lift the cut leg straight out of the hole while heating the connection with needle nose plyers..

BENT LEGS of components, soldered to the board: Many legs are bent 90 degrees before soldering.

DO NOT try to heat the board, and UN-bend the leg from the solder side.
DO NOT try to UN-bend the leg.
Instead: PUSH the leg STRAIGHT out of the hole from the POT SIDE. without UN-bending the leg on the solder side.
Click to expand...
ah, ok....that's making sense to me now...
 
Mcblink, MY suggestion is to practice on something that is similar type components and disposable such as old radios, laptops etc,

Also if anyone has used this, let me know.


 
chilipeppermaniac said:
Mcblink, MY suggestion is to practice on something that is similar type components and disposable such as old radios, laptops etc,

Also if anyone has used this, let me know.


Click to expand...
Yep, I have the old main pcb from this amp...I have used it a few different times for a practice run before doing it for real. It would probably be a good idea to practice up some more
 
chilipeppermaniac said:
Mcblink, MY suggestion is to practice on something that is similar type components and disposable such as old radios, laptops etc,

Also if anyone has used this, let me know.


Click to expand...

Surface mount components (like the picture) are soldered a different way. Not with a soldering iron.

The only connections you will use a soldering iron for: "Through Hole" connections.
Not surface mount connections.

 
mcblink said:
Out of curiosity, as I'm sure you've seen this happen before, what happens if someone destroys the board and there's no replacement? Probably a matter of cannibalizing another dead amp's parts? NOS parts? :poo:outtaluck?
Click to expand...

The entire bias pot board is an available replacement part.
You don't have to solder it if you really don't want to.
Part Numbers: (order by part number from dealer)
Kevin (Kdog) Drury
Marshall USA Service
1000 Corporate Grove Dr.
Buffalo Grove, IL 60089
800-877-6863
kevin.drury@USMusicCorp.com
 
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