National (Panasonic) RQ-568 HiFiMAC

Discussion in 'Tech talk' started by Jorge, Dec 22, 2019.

  1. Jorge

    Jorge Well-Known Member

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    Japan-only model, RQ-568 was the priciest box in HiFi MAC trinity:
    RQ-568 x3.jpg

    Nowadays it is available for under $50 from Yahoo-Japan, I paid a few extra pennies for the small miracle of a plug for "system up hole" being present. I realized that having this plastic peg is a miracle because I lost it within a few days upon receiving RQ-568, and found only months later in my car.

    As always, happy ending first: this HiFiMac is beautiful:
    827.jpg 829.jpg
    832.jpg 835.jpg
    830.jpg
    836_839.jpg

    Actually, RQ-568 HiFiMAC was bought as a companion for my then favorite National RS-4250 MAC ST-5, aka "Black Beauty":
    BB.jpg


    RQ-568 is very easy to disassemble, this is Not an Aiwa! When restoring, do not forget to rejuvenate the foam pad sticking from the back panel onto the woofer magnet: this is a great idea to help front plastic "baffle" in taming vibrations of a huge woofer
    P1030272.JPG P1030274.JPG

    Two belts:
    P1030285.JPG P1030289.JPG
    FlatSmall 10.6 fits nicely, cassette mechanism is very clean and pretty solid
    P1030290.JPG P1030291.JPG P1030334.JPG

    More cleaning and DeoxIt-ing:
    P1030339.JPG P1030343.JPG
    P1030348.JPG P1030351.JPG

    For when I get nothing better to do - there will be a recap for the amp board
    :delighted:

    One serious drawback of this model is that Service Manual is not available, so any electronic troubles should be traced... and without the usual benefits of a stereo models
    The only thing available is the cover page of its Technical Guide:
    RQ-568.jpg
    which proves that SM does exist and that W&F is almost decent for a bbox, at 0.12%

    Lets check how new belt and old mechanism are performing:
    IMG_1735.jpg

    Looks up to specs :)
     
    Last edited: Dec 23, 2019
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  2. Longman

    Longman Well-Known Member S2G Supporter

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    Please enlighten us as to what a "system up hole" is Jorge.
     
  3. Jorge

    Jorge Well-Known Member

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    This was definitely for Japanese-only market :) I think that hole is for the microphone holder?

    must be making sense for our comrades in Japan: as-is this reminds me of a joke about a basic statement “the rain is coming” after being translated by independent interpreters/translators onto different languages being morphed onto “the birds are flying South”
     
    Last edited: Dec 24, 2019
  4. MUTE AUTO

    MUTE AUTO Member

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    Good crafts:thumbsup2:
     
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  5. Jorge

    Jorge Well-Known Member

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    the Baby is BEAUTIFUL... now playing Uriah Heep "Demons and Wizards"
    :delighted:
    BUT once in-a-while she misbehaves and overlays a Lot of noise over the tune, be it line-in or cassette
    :veryangry:

    Once I am done swearing and open her up for tracing the problem, the problem disappears... one naughty lady she is!!!
    :omg:

    Myguess I shall have to have fun of a full recap, and then asking for your Help!!!
    :areyousure:

    Anyhooo... Merry Christmas, my friends!!!!!!!
     
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  6. Longman

    Longman Well-Known Member S2G Supporter

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    Did you see my comment about this box in the Nostalgiacon thread ?

    I guessed 1978 as the year of manufacturer

    Get the Yen to Dollar exchange rate back then to find it cost $229 back then.
    Feed that through an inflation calculator to find that in today's money it cost $860
    No wonder the quality is so high.

    However, I wasn't surprised. Nowadays, people will spend that on a phone.
    Back then someone wanting a quality radio cassette was prepared to spend a similar amount.

    Happy Holidays.
     
    Last edited: Dec 25, 2019
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  7. Jorge

    Jorge Well-Known Member

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    Ha!!! just bought a new phone for my Boss!!! (she does not give a s$&t or no care BUT iPhone 10 it Must Be!!!!)

    On the bright side: I see a few hi-end thingies posted and not claimed for months and months which would make any music-oriented boy quite happy...
    Last year I sold all my packaging boxes for my Linn LP-12 and Naim ARO arm so that I wouldn't have any second thoughts about upgrading... How sick s THAT??? Upgraditis is a disease!
    :omg:
     
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