http://igor.chudov.com/projects/misc/Toy-AK-47/

Pictures of the insides of a toy AK-74. Note that the trigger closes
the circuit and causes the gun to vibrate and make noises. One ofthe
wires was soldered to the trigger badly, was stressed by trigger
movement, and broke off right near the solder after a few days of a 3
year old playing with the gun.

My fix (not shown) was to re-solder the wire, and put a small amount of
shrink tubing around the soldering point, to provide some stress relief.

I did not expect that much for the price paid for these two toys, but
I would hope that it would break at least a bit later.

i

On Sep 23, 7:57*pm, Ignoramus8004
wrote:
http://igor.chudov.com/projects/misc/Toy-AK-47/

Pictures of the insides of a toy AK-74. Note that the trigger closes
the circuit and causes the gun to vibrate and make noises. One ofthe
wires was soldered to the trigger badly, was stressed by trigger
movement, and broke off right near the solder after a few days of a 3
year old playing with the gun.

My fix (not shown) was to re-solder the wire, and put a small amount of
shrink tubing around the soldering point, to provide some stress relief.

I did not expect that much for the price paid for these two toys, but
I would hope that it would break at least a bit later.

i

Very likely the original solder used was lead-free. This is a normal
failure mode for directly soldered wires. Leaded solder is flexible
and will work ok. You probably used leaded solder and this will fix
the problem permanently.

Paul

On 2009-09-24, KD7HB wrote:

Very likely the original solder used was lead-free. This is a normal
failure mode for directly soldered wires. Leaded solder is flexible
and will work ok. You probably used leaded solder and this will fix
the problem permanently.

I think that even leaded solder (without stress relief) would leave me
with the same problem. What failed was the bare strands right near the
solder. The thin bare strands flexed with very small flex radius, and
eventually failed. The solder remained on the steel spring attached to
the trigger. My fix was to essentially increase the flex radius and
make the trigger flex the part of the wire with insulation on it. I
will see how long it will work now. Probably the next thing to break
will be the vibrator motor.

i

On Sep 24, 9:35*am, Ignoramus2699
wrote:
On 2009-09-24, KD7HB wrote:



Very likely the original solder used was lead-free. This is a normal
failure mode for directly soldered wires. Leaded solder is flexible
and will work ok. You probably used leaded solder and this will fix
the problem permanently.

I think that even leaded solder (without stress relief) would leave me
with the same problem. What failed was the bare strands right near the
solder. The thin bare strands flexed with very small flex radius, and
eventually failed. The solder remained on the steel spring attached to
the trigger. My fix was to essentially increase the flex radius and
make the trigger flex the part of the wire with insulation on it. I
will see how long it will work now. Probably the next thing to break
will be the vibrator motor.

i

Never too young to start terrorist training!
Paul

On 2009-09-24, KD7HB wrote:
On Sep 24, 9:35?am, Ignoramus2699
wrote:
On 2009-09-24, KD7HB wrote:



Very likely the original solder used was lead-free. This is a normal
failure mode for directly soldered wires. Leaded solder is flexible
and will work ok. You probably used leaded solder and this will fix
the problem permanently.

I think that even leaded solder (without stress relief) would leave me
with the same problem. What failed was the bare strands right near the
solder. The thin bare strands flexed with very small flex radius, and
eventually failed. The solder remained on the steel spring attached to
the trigger. My fix was to essentially increase the flex radius and
make the trigger flex the part of the wire with insulation on it. I
will see how long it will work now. Probably the next thing to break
will be the vibrator motor.

i

Never too young to start terrorist training!

I think of it as "armed patriot training". Soon they will become able
bodied men, and therefore members of the disorganized militia.

i

In article ,
Ignoramus2699 wrote:

I think that even leaded solder (without stress relief) would leave me
with the same problem. What failed was the bare strands right near the
solder. The thin bare strands flexed with very small flex radius, and
eventually failed. The solder remained on the steel spring attached to
the trigger. My fix was to essentially increase the flex radius and
make the trigger flex the part of the wire with insulation on it. I
will see how long it will work now. Probably the next thing to break
will be the vibrator motor.

i

Iggy, you're teaching that kid to KILL -- batteries,lots and lots of
batteries!

AK-47. Cool. One of the best military weapons ever invented; powerful,
(enough) accurate, (enough) cheap and easy to manufacture in a basement
(or cave) workshop, and rugged as a D9 Cat. Almost as good a design as
the Holy 1911.

Do you plan on a Kalashnikitty for a daughter someday?