[Boatanchors] HAKKO 808 Desoldering Gun

[Richard Knoppow]

    When I was with Hewlett-Packard we had a tour of (I think) 
Mosley in Pasadena. They used wave soldering for circuit boards. 
A tray of solder covered with silicon oil. Under the solder was a 
roller that created a wave of solder across the tank. I did not 
see what was under the solder and don't know how deep the solder 
was but think it was pretty shallow. The circuit boards were 
loaded and carried across the solder wave by a conveyor. After 
cooling they went on to be trimmed and whatever other procedure 
they did. Its the only part of the tour I remember. I am pretty 
sure these were single sided boards but this is a fifty year old 
memory.
    Someone mentioned peanut oil. I wonder what advantage it had 
over silicon oil. I think the smoke point of refined peanut oil 
is not m much higher than the melting point of solder. The point 
of the oil is to prevent oxidation of the solder and to act as a 
flux.
     My own experience at the resistor factory I worked at for a 
while was that we used tanks of molten solder covered with 
silicon oil to seal resistors into ceramic shells. I don't 
remember the details of the machine but the resistors were 
carried into the tank on a conveyer not sure if by the leads or 
what. The oil would fill the tube and the solder would flow over 
the leads but not into the body of the resistor.

On 6/24/2020 2:27 PM, Robert Nickels wrote:
> I first encountered the ultimate desoldering tool in the mid 
> 80s while touring an NCR plant in the Twin Cities.    Virtually 
> everything was through-hole then, and they built some big 
> boards loaded with big DIPs and multipin connectors, but they 
> showed us they also had the right tool for the job in their 
> repair department - a solder fountain.    They'd clip on an IC 
> extractor (the kind with thin metal fingers that latch onto the 
> ends of the IC and apply upward pressure) and position it over 
> the fountain that produced a pedestal of molten solder large 
> enough to cover the entire part.    About 3 seconds after doing 
> so you'd hear the "snap" as the extractor would have removed 
> the part from the board, no muss no fuss.    I'm sure everyone 
> on the tour went home and told their bosses they had to have 
> one ;-)
>
> Here's a 1 minute video showing a similar machine in operation: 
> https://www.youtube.com/watch?v=AznNwJyzgV4
>
> Chances are if you buy some cheap parts off eBay that look like 
> they've been soldered to, they came by way of a machine like this.
>
> 73, Bob W9RAN
>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL