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NBC Story on Amateur Radio in Hawaii

Discussion in 'Amateur Radio News' started by KH6OWL, Feb 10, 2018.

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  1. W0PV

    W0PV Ham Member QRZ Page

    That's when the OOTC DX'er guys pull out all their "hollow state" Boat Anchor rigs :cool:

    The ham radio equivalent of the final act in "Battleship",



    The BEST scene IMO, brings chills down my back ... "Thunder!" :D

    73, John, WØPV
     
    KC8VWM, WW0W and W6ERM like this.
  2. W1YW

    W1YW Ham Member QRZ Page

    EMP , much caused by the Compton effect, happens on time scales of micro to milliseconds, so , as you surmise, lighting arresters would not work. Tube, and SOME discrete component solid state rigs are fairly robust against EMP, without Faraday cages. But any kind of global shielding works to some degree, that is, put it in a foil lined box. Also, keep in mind that EMP is subject to multipath, as all RF is. Thus there will places of nulls and enhancements. You see the same thing with local lightning strikes.

    I keep a KWM2 here in case it is ever needed.
     
    WW0W likes this.
  3. KU8L

    KU8L Ham Member QRZ Page

    Exactly...the story led off with the EMP angle---then they showed all the guys using SS equipment. EMP proof generally points to tube technology. Not a bad story, just a little misleading I think.
     
  4. KC8VWM

    KC8VWM Moderator Volunteer Moderator QRZ Page

    I say bring it on !

    I have the same radio equipment in my shack as they used aboard Mighty Mo...

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    Last edited: Feb 15, 2018
    W1YW and W0PV like this.
  5. KM1H

    KM1H Subscriber QRZ Page

    My generator has no SS and I believe the alternator that turns over the gas engine in motor mode from the battery are all somewhat EMP proof as is the CE-100V and 75A4 that is always ready to go on CW, SSB, and even AM.

    Enough gas is available for several weeks of very intermittent use but it could get rather chilly under extreme cold! It is regularly replenished by fueling vehicles and the lawn tractors. Power outages from hours to weeks are the norm in this rural area.

    OTOH there are several holes in that plan:eek::rolleyes:

    Carl
     
  6. W0PV

    W0PV Ham Member QRZ Page

    After a Soviet pilot in a MiG-25 defected some analysts scoffed at the "antiquated" vacuum-tube avionics but later realized this made it naturally more immune to EMP and extreme temperature effects, and also enabled it to carry more advanced (for that time) search radar capable of generating mega-power pulses, making it quite formidable in the role of interceptor.
     
  7. W1YW

    W1YW Ham Member QRZ Page

    The defunct country that brought you the (Duga) Woodpecker....and Chernobyl to power it.

    Don't ever underestimate Russian abilities in electromagnetics.
     
  8. KI4AX

    KI4AX Ham Member QRZ Page

    Faraday Cage is defined as a grounded metal screen surrounding a piece of equipment to exclude electrostatic and electromagnetic influences.

    My rig's case is a solid screen and it is connected to a ground. Does that qualify as a Faraday Cage? Or will the pulse back up through the chassis grounds etc.?
     
  9. W1YW

    W1YW Ham Member QRZ Page

    Excellent question.

    Faraday cages need to be electrically large to sufficiently thwart the EMP wideband pulse, and this seldom is realistic. Slits and indents act as slot antennas; screws and connectors act as inefficient but very real antennas, monopoles for example. Nasty, nasty stuff.

    The very least that can be done is to run a shorting cap on the antenna connector. Short everything.
     
  10. W7PLC

    W7PLC Premium Subscriber QRZ Page

    Myth or Fact? Turning Off Electronics Will Better Protect Them
    Yes, it seems that equipment is more vulnerable if it is operating. And this also includes cars. Cars that will be running when an EMP hits have a higher chance of getting broken.

    But this of course doesn’t mean that all systems that are turned off will be unaffected.
     

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