Friday, April 10, 2009

164 - 168MHz Radio Receiver

While up in Santa Cruz last weekend with my sister, Robert gave me a thingamajig he found in the University E-waste. I couldn't tell what it was, but once I got home and put power to it, it actually turned on (didn't expect it to work) and started scanning from 164MHz to 168MHz. I hooked it up to my 144MHz antenna and stepping through the channels for awhile, but never heard anything more impressive than static. From what I've found online, it looks to be a government band. Anyone know anything more about these frequencies?




2 comments:

  1. That band is used for US wildlife studies, tagging animals with transponders and whatnot. Explains the battery, and the field-worthy ruggedness of the enclosure. Would be used with an antenna to do DF on the target animal. You should email your (or my) bio dept and ask if they are doing any studies with transmitters in that band. :)

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  2. "Data on the foraging behavior of radio-tagged birds were collected by two means: using four remote receiving stations (RRSs) and by following birds with a boat. RRSs were composed of a 164-168 MHz Advanced Telemetry Systems (Isanti, Minnesota, USA) receiver, model R4000, connected to an Advanced Telemetry Systems data collection computer, model DCC1. The receiver and computer were powered by an 80 A-hour lead-acid battery, which was charged by a 3-A solar panel. The receiver and computer were housed in a waterproof, plastic "Pelican" case. The type of antenna that was used depended on the range desired; for the RRS setup at the colony a two-element H antenna was used; for the three other locations, a more powerful five-element Yagi antenna was used. Antennae at all sites except at the colony were attached to 10-m extension poles; at the colony the RRS antenna was mounted on a 2-m pole. The RRSs monitored the frequency of each radio-tagged bird every 200 s."

    http://findarticles.com/p/articles/mi_m2120/is_n2_v79/ai_20574306/pg_2/?tag=content;col1

    Google-fu.

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