On 09/05/2012 20:34, Norman Dunbar wrote:
Evening Tony,
On 09/05/12 14:09, Tony Firshman wrote:
I see from the current issue of Quanta that a joky "quote of the show"
referring to Lee's removal of components from pcbs using a blow torch.
This is not a joke. I too used a purpose built 2kw hot air gun to
selectively remove components from QL pcbs. This I suspect is similar to
the 'blow torch' Lee used - nothing like the gas powered paint strippers
one no doubt imagines.
My image when I hear the word "blowtorch" is of my dad filling his with
paraffin and pumping it for what seemed ages to get some pressure up and
then a huge blue flame!
It was a big brass thing with a decent reservoir for fuel, taps and
pumps, possibly a "Primus" but I'm not sure. I think he still has it,
somewhere!
We used to to melt lead for fishing weights. Also melted a few of my
mothers old pans, aluminium I think.
Cheers,
Norm.
apologies for getting OT here but I remember (just) those and I have a
pump from one in a shed (well I'm sure I'll use it one of these days)
also we had lamps of similar technology, you pumped them up then lit the
"mantle" a delicate lace like item that had to be burnt off when new,
interestingly I learnt a lot later that said mantle were highly
radioactive and probably still are
All the best - Bill (typing whilst emitting a strange fluorescent blue glow)
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