GregS said:
I would say half my soldering days were with Ungar soldering irons, with
the
screw-in heaters and screw-in tips. They work if you select the right
wattage or use
a variable triac heat control, or just use the diode trick to reduce
wattage to about a third.
greg
Ah ... The diode trick ... We used to have a really scruffy worker at one
place that I worked as a youth. He used to repair, amongst other things,
high power audio line amplifiers on a television distribution network, where
vision was fed round on a low frequency carrier, and audio was demodulated,
and fed round at audio. You could always tell amps that he had worked on.
Most of the print around the output transistors would be missing, and
bridged with whatever bits of wire / nails / welding rods that he could lay
hands on. We used to say that they had been "Cottle-ised" (his name wasn't
actually Cottle, but that's near enough ). Anyway, the irons that the
company used were Adcolas. These were clunking great things with a polished
bakalite handle. If you were skilled, they could actually be used with
surprising delicacy, but in Cottle's hands, it was a poker. One day, when he
was out to lunch, we had the brilliant idea of removing the fuse from the
plugtop of his bench iron, and soldering a BY127 diode across the holder.
This left the iron plenty hot enough to melt solder to tin the tip, but as
soon as he applied it to a joint, iron, solder and joint all stuck together
like superglue. We all fell about listening to him cursing and banging
about. He eventually found the diode, but not before spending the afternoon
replacing the element, and checking the mains voltage and the isolation
transformer on his bench. We suceeded in pulling the same trick on him at
least another twice as I recall, and also did the same to his bench light,
which resulted in an annoying 25Hz flicker that he couldn't solve for a
couple of days.
Workshops used to be such fun in the 70's. Now it's all legislation and
health and safety ... Anybody else have fond memories of long hair, a copy
of NME in your back pocket, and workshop tricks ?
Arfa