You'll find them in a lot of older homes, often with steam heat rather
than a hydronic system. Some have been converted to hydronic,
though. They're expensive as well as taking a lot of prime floor
They were installed by a moron, then. Ours had a bleed valve on each
unit, as part of the automatic bleeder (which never worked).
There should be a screw in one end.
It's cheap (installation), too. Baseboard electric is even cheaper.
We use AC more days than heat, so yes, there is an advantage to heat
pumps here. It's crappy heat, though.
It's very nice in tiled bathrooms. ;-) Radiant ceiling heat is
240V plugs are very similar to the 120V-20A plug, with the opposite
pin, or both, rotated. Clothes dryers and ranges have larger plugs
(30A or 50A). The smaller ones are often found on window or through-
the-wall air conditioners. Places were 120V 15A isn't enough.
20A 120V plug:
20A 120V outlet:
Hmm, I don't recall ever seeing anything above a 13A fuse in a UK plug,
suggesting that for anything more than that, there's a different style of
plug to use. I certainly recall running big Sun servers off something a
lot more substantial than that.
Pros and cons with plugs on both side of the Pond, really. The UK ones
are bulky (I like US wall-warts where the pins can just fold away easily
when not in use) but at least are fused, and the pins are strong. I've
seen plenty of US houses where the outlets are getting a little tired and
things are plugged into them with the pins partially exposed, which is
never a good thing.
The Americans got that 20 ton vacuum tube maintenance nightmare out of
a big air conditioned room and into your pocket. (the microchip being
the technology I was talking about).
If you want to go back 60 years, I would just go back 40 and point out
who went to the moon.
Still pissed about how the revolution came out huh?
Get over it.
Without the Americans, you would be speaking German right now ... or
Russian. If you noticed, the Soviets kept everything they took from
On Mon, 30 Aug 2010 00:08:03 -0400, gfretwell wrote:
I don't think it was ever air-conditioned - if I remember right, H-Block
had four Colossi and F-Block had six, but they were in quite large rooms.
It gets quite warm during summer in the room that the modern rebuild is
in, but there's no aircon (although the false ceiling tiles can be moved
out of the way to aid heat dissipation ;-)
They weren't that much of a maintenance nightmare due to the way they ran
the valves (tubes) - and based on moving similar racks I'd probably put
the weight at around 3 tons (not that 20 vs. 3 makes much of a
The history of computing is murky indeed, with lots of separate efforts
around the same timeframe in different parts of the world, each
contributing to the evolution. Inevitably one person or team gets credit
for an invention, but rarely is that invention a sole product of the
people who produced it.
As for ICs, if I remember right the Germans, British and Americans all
had a hand in it; again it was an evolutionary process. The first working
one was American - but drew on theories, designs, experiences and
prototypes of the Germans and Brits.
To be honest I'd rather it be simple so that I can maintain it myself,
make new parts for it if I have to etc. - and keep it running pretty much
forever, rather than "forcing" some factory to provide me with some new
plastic-fantastic piece of junk.
Like an automobile? Computerizing automobiles has been both a bane and
a blessing. If the computer completely dies, you're dead in the water
but a partial failure can put the engine into "limp home" mode and still
get you there. My older cars could be kept running with bailing
wire and duct tape and would be the transportation to have if the
country were to collapse and fancy new parts were unavailable. Think
"Road Warrior". 8-)
On Tue, 31 Aug 2010 23:58:18 -0500, The Daring Dufas wrote:
Yeah, been there, done that so many times. Fixed a few faults by the
roadside which probably would have had me stranded in a more modern
I don't mind computerising stuff as such - but only if I can easily get
hold of the schematics, firmware code, replacement ICs etc. rather than
the computer part being treated as some unserviceable black box.
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