Vietnam War TRC-3 Seismic Intrusion Detectors (3) 134.500MHZ Tested and Working

Description

*Baofeng radio not included only shown for proof of function* I have done my best to test these individually but I'm not an expert on these units.  Vietnam War TRC-3 Seismic Intrusion Detector Set of 3 - Tested and all three units generate a tone received on a Baofeng radio (not included).  Frequency is 134.500MHZ and all three units are sequential 1-3.  Each unit uses two standard 9v batteries, not included (lithium recommended).  They report in either a high or low beep corresponding to the ID number- 1-3 beeps.  Condition is "Used" but this set appears not to have been deployed, two of the geophone spike holders are cracked but does not affect function. This is a known fragile part on these units.  Includes original canvas bag.  I have a dozen of these sets I will be listing.  I have seen these in use with the broken clips modified with  a section of hose which work better.   These are a 'go anywhere' alarm and will last months buried in the ground.  I've seen them used as vehicle and out building alarms too.  Military spec and built to last.  Secure your perimeter.  Please ask any questions before bidding, no international shipping.  Shipped with USPS Priority Mail Medium Flat Rate Box.  PayPal accepted.  Thanks for looking.
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