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Yosemite Sam is the nickname that has been given to a mysterious station that was first reported on December 19, 2004. It transmits on four frequencies:

3700 kHz 4300 kHz 6500 kHz 10500 kHz

All transmissions are in DSB, double side band. That is, they can be tuned in either USB or LSB modes. It's essentially AM with no carrier.

A transmission is made on one of the frequencies. Then ten seconds later, it is repeated on the next higher frequency, and so on. Since there are four frequencies, a transmission is made on a given frequency every 40 seconds. The entire pattern takes two minutes (120 seconds). Transmissions always start at an offset of 7 seconds, such as at 10:00:07 UTC. The timing of the transmissions seems to be excellent.

Each transmission starts with what sounds like a data burst, followed by the phrase: "Varmint, I'ma gonna blow ya ta Smithereens" said by what sounds like the voice of Yosemite Sam, of the Looney Tunes cartoon fame. The clip is apparently from the cartoon "BUNKER HILL BUNNY", 1949. An audio clip of a transmission is here (on this video)

The data burst is 800 milliseconds long.

The first clip is from:

the second clip is 3700KHz_12-21-04_0415UTC_USB and the third is 3700KHz_12-21-04_0413UTC_LSB from

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current23:25, April 8, 2014Thumbnail for version as of 23:25, April 8, 2014480 × 269 (21 KB)ProudlyExiled (wall | contribs)created video