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View Full Version : Repair/disassembly tricks?


Leonc
12-03-2006, 11:27 AM
Hey I've been diddling with values of some minor components in my old Silvertone 1482. There's a problem that I often run into when I've done minor repairs/mods on old amps or pedals (which isn't too often--I'm a real novice).

The problem is that the person who put it together did a really ^#@%$( great job, damn it!! LOL - The ends of the components are often bent and twisted around whatever it is they're attached to so that getting them appart is a freakin nightmare.

I've got Quick Braid and a solder sucker so getting the solder off is not really the issue. I've got a regular needle nose (joe shmo grade from Sears or somewhere like that) and jewler's screwdrivers but man...it's really a bitch trying to remove components from pins on tube sockets, for example. In fact, in my work on the 1482, I haven't been able to. I've been trying to "unwind" the components leg from the pin that it's tightly wrapped around using the needlenose and a jeweler's screwdriver. The problem is that you can't wiggle/bend the component's leg too hard or for too long or you'll break the pin in the tube socket or snap the leg off the component. I wound up just cutting the the legs off, leaving a little piece of the original component's leg still wrapped around the pin.

I guess I need a better, more accurate needle-nose pliers for starters, with a better tip...but are there any other pieces of equipment, tools or techniques you've found useful?

Dave C
12-03-2006, 03:54 PM
Try getting some needle nose pliers from Klein , Xcelite or Crescent even. Good tools work better and last longer as well. I've also found hemastats to be very handy, they clamp on like Vise Grips. A good pair of small fine pointed side cutting pliers(dykes) can often cut cut the individual wraps easier than trying to unwrap/unsolder component legs at times.
Dave C

Leonc
12-03-2006, 03:58 PM
Thanks Dave, excellent tips!

PaulC
12-04-2006, 12:50 AM
Get a dental pick. They have a strong, sharp tip that can get under a part to wiggle it loose enough to allow you to cut it easier, or loose enough to be able to unwrap it.

Hope to see you at NAMM Leon!

PaulC

Leonc
12-04-2006, 09:36 AM
Excellent tip Paul! Thanks a bunch.

Yeah, I'll be there. Colonial's still my Go-To amp...even in-spite of this Silvertone, :D!

jimberry
12-05-2006, 09:07 AM
The set of tweezers I have came with what I believe are called "locking tweezers" which are sorta backwards ones which are spring loaded to stay closed and you squeeze to open.

Google "locking tweezers" to see what I mean.

I use 'em all the time on component leads (between the lead and a post, or another component lead, or a board) to provide a little tension so the thing will move when the solder flows.

Ronsonic
12-06-2006, 09:27 PM
As you probably learned while soldering, movement while cooling ruins a solder joint. Now's when you use this to your advantage.

Try this desoldering technique: Heat the joint, while heating grab the lead with your pliers, wiggle it gently. Remove the iron while still gently jiggling. The solder hardens into a grainy, crumbly mess and the component leads is still loose on the terminal. Using nice sharp nippers - I use flush cutters I find cheap at electronic supply houses - clip the looped lead that offends. Your part is now free.

Ron

Tuberattler
12-06-2006, 09:32 PM
You can find a lot of these small tools for really reasonable at places like Harbor Frieght if you don't do it for a living no need to buy expensive tools for ocasional work.

Leonc
12-06-2006, 10:54 PM
As you probably learned while soldering, movement while cooling ruins a solder joint. Now's when you use this to your advantage.

Try this desoldering technique: Heat the joint, while heating grab the lead with your pliers, wiggle it gently. Remove the iron while still gently jiggling. The solder hardens into a grainy, crumbly mess and the component leads is still loose on the terminal. Using nice sharp nippers - I use flush cutters I find cheap at electronic supply houses - clip the looped lead that offends. Your part is now free.

Ron

Yes indeed. Excellent advice. I wound up using a technique pretty much like that.