Probably not a problem out east, but in California we have a problem with "Spawn Campers" who will leave you high and dry. They have been known to lock engineers in buildings and take off with they're ride. These are the same individules that will steal the hard line on the tower with a saws-all and sell it to scrap dealers
If you are ever at a site alone, never leave your keys in the vehicle, ever.
If your building has a padlock, always lock the door to the building in the open position by placing the lock on the hasp.
If you didn't follow the first two sugestions and got locked in the building like a dumb-ass, Go straight for the breaker panel. Kill everything except for the lighting. This is by far the fastest way to get help. Sometimes faster than using the phone which very few sites are equiped or the one which you left in the truck, which is now stollen. This will not only get help, but the help will have a key to the door and get you back to civilization.
Always tell people you are going up to do work, and when to expect you back. This way they can search for you if you were malled by a large cat or got your truck stollen (with the cell phone and your keys) and can't get into a building. Waiting for help beats walking.
Don't poke around a Tube transmitter alone and some of the higher power solid states, ever. Even with the interlocks operative and doors closed, these can still deliver a high voltage charge through front panel meters, switches and test points. I was on the receiving end of an FM transmitters 3kV plate supply once due to a defective meter and a friend got lit up by the beam voltage of a klystron in a TV transmitter and almost died when someone decided to turn on remotely, It was 8 hrs before he woke up in a puddle of blood and called for help.
On a related note to the above, be sure to disable all automation systems and flip all breakers off when opening a transmitter. Be sure it is the correct breaker by using a cheap wireless AC sensor on the transmitter's power terminals. I got lit by 240VAC once because the wrong breaker was fliped when I was attempting to change some 20A fuses. I didn't get hit but could of when I had the cabinet opend with the HV off and the filliments still on to tweak the filliament voltage the automation attempted to cycle the HV relay 5 minutes later because it was programmed to do so in a power faliure. Good thing the interlocks on this transmitter still worked.
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