In article , Patrick Turner
writes


Iain M Churches wrote:

"Andre Jute" wrote in message
...
rec.audio.tubes

Kilovolt transmitting tubes

Let's make a new thread here.

Now we are back on track. This is the kind of stuff
RAT needs and is famous for:-)

Iain

One needs a special respect for working with
1,000v+ anode voltages.

Its a wonder more ppl have not been killed....

Well when I used to work for the old Pye Television Transmitter company
they had Klystrons in the UHF Tx's, some 15 kV on the collectors, and
all that was in UR67 co-ax with the screens well earthed!.

All the caps and suchlike had large knife switches that were used for
grounding after the power was switched off. The whole lot was controlled
by a A and B key system in that a number of the B keys could open the
various cabinets but in doing so they were retained in the locks until
closed with an elaborate system of switched interlocks. Only when all
the B keys were back in the frame that they stayed locked into, could
you take the A key out to lift off the earths and turn on the power.

In a remote part of Indonesia some maintenance engineer found it
expedient to have a spare A key, he got a local locksmith to make up.
Needless to say in that country the TX sites were a bit remote so it
wasn't unusual for an engineer to go missing for a few days, which he
did, and after a few more days than usual, they went looking.

They found him, or what was left of him, in a high voltage cubicle and
the body had much of its flesh removed by animals and insects;(
proved that the companies insistence on NO spare A keys was a good
thing!.....

--
Tony Sayer