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  1. #1
    Redbeard is offline Baby Duck
    Dx Number/Handle:
    U812
    Equipment:
    Uniden PC66XL w/ Palomar LD 450 FET, Stryker SR-497HPC, 148GTL w/ Shooting Star 225 Plus, Kris XL-40

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    Aug 2018
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    148GTL SSB Transmit and Recieve

    148GTL is acting strange on trans. and rec. Bought it from shop year ago and just now hooked it up. Charlie's Airwaves in Houston had it on a shelf. Clarifier is unlocked (slides 16 KHz, about 8 KHz both ways). Testing it I was told I sounded off freq., had to adjust clarifier. On trans. On receive I have to adjust clarifier to keep from hearing the space aliens on helium. Knob setting for rec. is about 11 o'clock. Knob setting for trans. is almost 1 o'clock. My co-conspirator in test was only a few miles away. Knob Jockeying is not my idea of fun to communicate. Anyone have an idea what can be done to remedy this 148 ailment?

  2. #2
    Redbeard is offline Baby Duck
    Dx Number/Handle:
    U812
    Equipment:
    Uniden PC66XL w/ Palomar LD 450 FET, Stryker SR-497HPC, 148GTL w/ Shooting Star 225 Plus, Kris XL-40

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    Aug 2018
    Location
    TX.
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    Never mind that.....this thing has been modified by a golden screwdriver. Has some kind of channel mod installed. NB/ANL, HI/LOW, and BRT/DIM change frequencies. The different positions seem to only change the freq from what is shown on LED display. NB/ANL-LOW-BRT changes Chl. 29 to 27.935(10M). NB/ANL-HI-DIM changes chl. 23 to 26.935(LSB 38). Some positions duplicate freq. This thing is F'd up. Screws holding board down are all soldiered. The Ext. speaker and PA have been jumped over to create Talk Back. Guess I'll build a Road Map from Hell for all chl. configurations. Thinking this may be some form of Enigma Machine. Three switches change chl. freq's- the Enigma had three wheels in it that changed key output. Any help would be greatly appreciated.

  3. #3
    Redbeard is offline Baby Duck
    Dx Number/Handle:
    U812
    Equipment:
    Uniden PC66XL w/ Palomar LD 450 FET, Stryker SR-497HPC, 148GTL w/ Shooting Star 225 Plus, Kris XL-40

    Join Date
    Aug 2018
    Location
    TX.
    Posts
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    Found this online at Anglefire:


    1. Replace 11.1125 crystal with an 11.3258 crystal.

    2. Isolate the ground pin 10 of the MB8719 PLL by cutting the PC trace.
    3. At this point, turn your radio on and check to verify that all channelsare locked in and working. If it is not, adjust these in the following order:
    a. CT3 for USB.
    b. L20 for LSB.
    c. L19 for AM.
    4. Install a SPST switch between pins 11 and 12 of the MB8719 PLL
    5. Install a SPST switch across the cut you made to isolate pin 10.
    CHANELLS:
    SW1 / SW2 DOWN (NB/ANL-LOW-DIM): NORMAL 1-40
    SW1 UP / SW2 DOWN (NB/ANL-HI-DIM): (ch.15-27) 26.815 to 26.955
    SW1 UP / SW2 UP (ANL-HI-BRT):
    1= 27.605 6= 27.505 11= 27.565 20= 27.525
    2= 27.455 7= 27.515 12= 27.585 23= 27.575
    3= 27.465 8= 27.535 13= 27.595
    4= 27.485 9= 27.545 14= 27.605
    5= 27.495 10= 27.555 16= 27.475
    SW1 DOWN / SW2 UP (NB/ANL-LOW-BRT): (Ch. 1-40) 27.605 to 28.045

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