On 02/12/2014 07:17 PM, DerbyDad03 wrote:
philo wrote:
On 02/12/2014 06:03 PM, DerbyDad03 wrote:
Stormin Mormon wrote:
On 2/12/2014 8:03 AM, philo wrote:

That's weird, my UPS system will power my laptop for about a year or so.


https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg

http://www.columbia.edu/cu/computinghistory/tubes.jpg

They keep trying to upgrade my processor.

And your UPS would run this for at least TWO years.
http://www.wpclipart.com/computer/PC...cuum_tubes.png

Who needs those wimpy arse vacuum tubes. A real man works with these...

http://www.qsl.net/oz1dku/loran%20PA%20tubes.jpg

These are water-cooled PA tubes for Loran transmitters. Filament current
300A at 12.7V. Plate voltage 15,000 VDC. Output power 1.5MW.

When they went bad we hollowed them out, wired them for 120AC and made 25
lb desk lamps out of them.




I guess they didn't come up with a transistor to replace that one

They did, but it was many years after I worked on them. The timing
equipment had _just_ gone solid state when I started working on it but the
transmitters were still vacuum tube.
X



snipped but read


Back in the 60's when I first got my ham ticket we'd always hear Loran

I figured that now with GPS it would no longer be used, but a quick
Google search shows it's still in use.


Sure liked those old days of vacuum tubes.

A friend of mine picked up a couple of WW-II radar sets and converted
them to 1296 mhz transceivers.
In 1965 that was quite an advanced project.


As to finding high-voltage arc-overs.
I still recall watching TV at a friend's house and him telling me that
his dad had to put a glass ash tray inside to prevent arcing over!