[Collins] Re KWM2A V13

[Glenn Little WB4UIV]

At 11:54 AM 2/16/2012, Jim Whartenby wrote:
>Interesting observations by Rick.  Just goes to show that a thorough visual
>inspection is always in order.
>
>A few questions for those in the know:
>Just how was the assembly line at Collins organized?
>One did the mechanical assembly, soldering and then did a self inspection?
>Another did the final inspection?
>Who then applied the witness stripe to show that the solder joint 
>was inspected?
>
>It would be interesting to know if the unsoldered joint  had a witness stripe.

Many years ago there was a surplus house in Charleston, SC.
I found a KWM-2A chassis that looked like it had been run over by a bull dozer.
While salvaging what parts that were still usable, I discovered why 
the radio was scrapped.
On a tube socket, there was a very well made mechanical connection.
The problem was that there was no solder, but, there was red paint 
(witness stripe), as on all the other connections, indicating that it 
had been inspected.

I have seen the same on GE radios as well as Motorola radios.

Just shows that we are human and the well skilled technician will get 
the bargins.


>Was the tube socket turret populated and mated to the wiring harness 
>before it
>was integrated into the chassis?  Things were so tight in the 51S-1 when I
>replaced capacitors, I found it difficult to mount components and solder them
>without causing some minor damage to other wires and components close by.
>
>As I replaced components in the 51S-1, I also found broken ground 
>connections on
>at least two coax cable shields.  I don't remember finding any unsoldered
>joints.
>Jim
>
SNIP

73
Glenn
WB4UIV