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Collins R-390a/URR HF Communication Receiver
Collins R-390a/URR HF Communication Receiver
Collins R-390a/URR HF Communication Receiver
Collins R-390a/URR HF Communication Receiver

Collins R-390a/URR HF Communication Receiver

$ 290.39

Availability: 16 in stock
  • Condition: Was able to fire it up once but the power cord was crumbling in our hands. We taped it up but now the breaker trips. Power cord is bad and will need replace. The radio operation was not tested. Selling as is for parts or repair. Radio appears to be in pretty good condition with all the covers.
  • Type: Receiver
  • Model: R-390A/URR
  • Brand: Collins

    Description

    Collins R-390a/URR HF Communication Receiver.
    The R-390A is a general coverage radio receiver capable of receiving
    amplitude modulated
    ,
    code
    , and
    frequency shift keying
    signals. Its tuning range is from
    500
    kHz
    to
    32
    MHz
    , in thirty-two
    1
    MHz
    bands. The circuit is the
    superheterodyne
    type, double conversion above
    8
    MHz
    , below which triple conversion is used. It employs 23
    vacuum tubes
    , a larger than normal count for most general-coverage receivers.
    The R-390A was deployed to most branches of the US military and remained in general use through the 1980s.
    when they found that the R-390A's vacuum tube circuitry could easily survive an
    electromagnetic pulse
    . There are reports, possibly apocryphal, that R-390A receivers are still in use aboard
    U.S. Navy
    submarines
    since the receiver can withstand the strong
    radio frequency
    fields found aboard ship.
    Did power on when we first got it  home. But the power cord crumbled in our hands and now it trips breaker. Needs replaced. I am no expert on these so the operation
    of the radio was not tested. Sold as is were is for parts or repair.
    NO RETURNS so make sure its what you want. Thank you!