CIA declassifies Soviet-era amateur radio

Discussion in 'Ham Radio Discussions' started by K0UO, Nov 30, 2019.

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  1. W0IS

    W0IS Ham Member QRZ Page

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  2. KA4DPO

    KA4DPO Platinum Subscriber Platinum Subscriber QRZ Page

    I am kind of amazed that they were able to hear any DX stations in 1965 with Radio Moscow blasting out of their back yard every 15 KHZ.
     
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  3. SM0AOM

    SM0AOM Ham Member QRZ Page

    So am I.

    Most USSR operators that operated DX in the 60s and 70s were however quite good, and the
    skip zones may have spared them from the most powerful signals, as they also were beamed West.

    Anyway, 7 MHz in these days was a "mess" of broadcast carriers which more often than
    not overloaded even the better receivers.

    The club in my home town had a few quite well-off members, and one of them had an S-line.
    Another member worked with military fixed installations, and brought the latest solid-state wonder in 1972, the SRT CR302A, to a club meeting to demonstrate.

    A side-by-side comparison with the 75S-1 and the SRT receiver was made connected to the 2 element Hy-Gain yagi at 28m height that the club boasted.

    It turned out that when beaming south-east, the whole 7 MHz band became a mess of distorsion products with just a few strong amateur signals coming through on the 75S-1, but by using the 20 dB attenuator and some "juggling" of the RF gain in the CR302A, many more amateur signals became readable between the carriers of Radio Peking, Radio Moscow and Radio Tirana.

    The Collins owner got a look in his face that I never will forget...

    During the Cold War, the European signal densities in the "popular" parts of the HF range were simply amazing. In the mid-80s, there was some discussions about the actual dynamic ranges required over the coffee table at the then QTH of master receiver designer Rolf/SM5HP.

    There were some scattered ideas from the audience, so we decided to see for ourselves.
    An RF voltmeter was connected to the feedline of his 2x40 m dipole 25 m up. It turned out that the reading became almost one volt.

    A spectrum analyser was then connected, which showed a "forest" of carriers between
    -20 and -5 dBm in the 6, 7 and 9 MHz ranges.

    The demands put on "good" receivers during this era might be difficult to fathom for later generations.

    73/
    Karl-Arne
    SM0AOM
     
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  4. W4ZD

    W4ZD Platinum Subscriber Platinum Subscriber QRZ Page

    Your comment makes no sense. They all dropped the code requirement for pretty much the same reasons. The order is the way I would have expected it to go.
     
  5. W4NNF

    W4NNF XML Subscriber QRZ Page

    Your comment is the one that makes absolutely no sense. Sorry.

    Amateur radio maintained the code requirement long, long after its use was discontinued by the military, the commercial interests, etc.

    So, eliminating the code requirement didn't, as you want to assume, "[A]mateur radio was once considered a national resource. Nowadays it's just a hobby. Things like dropping the code requirement are indicative of this," didn't make amateur radio any more a hobby or any less valuable to public service or the military in any way.:rolleyes:
     
  6. KF5LJW

    KF5LJW Ham Member QRZ Page

    50 years ago that was the case. Today just a tired hobby not many care for as it has no purpose today.Only thing ham radio can kill today is a lot of time and money.
     
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  7. N2EY

    N2EY Premium Subscriber QRZ Page

    Sort-of.

    Various US military radio services stopped using Morse Code at various times, depending on available equipment. RTTY (they called it RATT) was in use in WW2 in the Army and Navy, when the equipment was available.

    Maritime use of Morse was required until 1997, when the treaty requirements for ships changed.
     
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  8. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    You are not reading correctly. He explicitly states that dropping code is an INDICATOR, not a cause.
     
  9. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    Ham radio is not tired. But some hams are. Look in the mirror! ;)
     
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  10. N2EY

    N2EY Premium Subscriber QRZ Page

    A bit of history:

    One of the reasons for the changes known as "incentive licensing" was the perception that US amateurs weren't keeping up with technical know-how or operating skills. The complaint was that they were becoming a bunch of appliance operator hobbyists....

    See FCC Docket 15928, released by FCC on March 31, 1965. It's in QST for May, 1965, starting on page 44.
     
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