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

[eSGEe]

you said "surface mount" -- BUWAHAHAHHAHAHAHAHA

 

[eSGEe]

bias port.......oh man your killing me

 

[mcblink]

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

Holy crap....I was led to believe that these were not available anywhere.

Thanks a million bro, that makes me feel better about giving it a go, because if all else fails and I really goof it up, there's still hope!

...I expect it's probably not too cheap though...but IT EXISTS!!

 

[Hackmaster]

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? outtaluck?

I've used wires to replace burned traces on boards.
Just a matter of jumping betwixt the terminals, but it's one of the crudestest forms of hackdom.

I know of two Hot Rod Deluxes that are still living because of this, when the screen resistors self destructed and played 4th of July with the board they were mounted to.
Though this was done for a quick fix, not a lack of availability.

 

[Amp Mad Scientist]

Holy crap....I was led to believe that these were not available anywhere.

Thanks a million bro, that makes me feel better about giving it a go, because if all else fails and I really goof it up, there's still hope!

...I expect it's probably not too cheap though...but IT EXISTS!!

I don't think those cost a lot.

 

[chilipeppermaniac]

Those dang 4th of July AMPS, Glad I haven't encountered any of that.

 

[Hackmaster]

Those dang 4th of July AMPS, Glad I haven't encountered any of that.

It's ugly.
So is the quick fix.

 

[Amp Mad Scientist]

IT is well documented in the annals of TTR that I HATE soldering -- with a red hot passion (lol)

It is the bane of man and a tool of the devil and can be traced to all things wrong in the world (Kinda like a Kevin Bacon thing but takes more steps)

That said if AMS would like to ATTEMPT to teach me how to do this evil (though the duct tape co. is going to drop market share if I do) ---I would be HAPPY to attempt the course.

What say you all --- the poll is open (no strip dancing please unless you are hot of course.....then well go right ahead)

What say you AMS --- think your MAD enough to try?

Lesson 2
Cleaning the soldering tip.
If the tip isn't clean, you can't solder.

 

[Amp Mad Scientist]

It's ugly.
So is the quick fix.
View attachment 45172
View attachment 45173

That won't work.
The black carbon on the board - is conductive.

All the black carbon must be removed completely.

 

[mcblink]

Could a person use a dremel for that kind of thing to avoid the burning?

 

[Amp Mad Scientist]

Could a person use a dremel for that kind of thing to avoid the burning?

Yes

 

[eSGEe]

this one REALLY gets in there and does great damage

 

[Amp Mad Scientist]

this one REALLY gets in there and does great damage
View attachment 45175

First you must "prep" the board.
Then sandblast.

 

[Hackmaster]

That won't work.
The black carbon on the board - is conductive.

All the black carbon must be removed completely.

It did work, and years later it's still working.
The carbon was removed. An xacto knife & pencil eraser works wonders.

 

[Cadorman]

Adrian, come play with this...

 

[eSGEe]

WHAT THE FLYING F**** is that?!?!?!?

 

[Chubbles]

If you end up with something that looks like this, you're in trouble...

 

[JohnnyGoo]

 

[Cadorman]

WHAT THE FLYING F**** is that?!?!?!?

Resistance soldering unit. Got a ground and electrode. The point of most resistance (point of soldering) is what heats up.

 

[chilipeppermaniac]

If you end up with something that looks like this, you're in trouble...
View attachment 45189

If you end up with something that looks like this, you're in chubble