[time-nuts] Spectracom 8140T Line Tap Schematic

Bob kb8tq kb8tq at n1k.org
Thu Jun 14 08:59:48 EDT 2018


Hi

I think you would find a *lot* of smaller outfits “back in the day” running hand soldering lines. Small scale wave solder for through hole did not 
catch on the way reflow has for SMT. Dip solder was a rare item ….

Bob

> On Jun 13, 2018, at 11:28 PM, Charles Steinmetz <csteinmetz at yandex.com> wrote:
> 
> Nigel wrote:
> 
>> with far too many assorted internal photos plus details of said interesting discovery, with extra brownie points to anyone who might already be thinking foam and cardboard sandwiches:-)
> 
> Oh, my, that brings back memories!  That method of "encapsulation" was used by a number of Rochester electronics firms of the era.  It was developed by a good friend of mine with whom I worked at another firm about a decade before Spectracom was founded, and was introduced at Spectracom when he moved there.
> 
> It's hilarious now, looking at the crude PC layouts, the PC cards that look like they were separated with hatchets (in reality, they used heavy-duty, office-type guillotine paper cutters), and the "definitely not near mil-spec" hand soldering job using at least 5x the optimum amount of solder.  Spectracom didn't even have a dip-soldering operation, much less a wave-soldering system.
> 
> It was a much, much simpler time, one rung up the ladder from hippies in a basement....
> 
> Charles
> 
> 
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