[ARC5] 70+ year old errors

[Glenn Little WB4UIV]

In the 1970's a friend of mine got a KWM-2 from a scrap yard.
It was in baddd shape.
He recovered a few parts and I would up with what was left.
During disassembly, I found a wire that was properly inserted into a 
tube socket pin and bent over as it should.
There was the Collins inspection paint on the pin, but, no solder!.

While disassembling a Motorola multi gang rapid charger for walkie 
talkies, I found a wire that went through a lug as it should, but, 
again, no solder.

I buy boards and assemblies at hamfests to reclaim the parts.
On one board, an IC pin was bent under the IC from where it was 
inserted on the board.
The board was wave soldered and had a QA stamp.
In this case, the IC pin probably was soldered, at one time, but, 
thermal cycling and/or vibration broke the connection.

This QA problem seem to be spread across most companies and is not 
getting any better.

In the first two cases above, both pieces of equipment probably 
passed final, functional, testing.
The both probably worked until vibration, thermal cycling and 
corrosion cased the connection to go Hi Z.

I would think that anyone that has repaired equipment has a story or 
two about defects from the factory.

73
Glenn
WB4UIV