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FT101E Lazy S Meter

Discussion in 'Ham Equipment' started by siltronix_man, Feb 24, 2012.

  1. siltronix_man

    siltronix_man Member

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    Looking for some help,seems one of my 101e has a lazy meter meaning meter will not move unless a real strong signal comes in ive tried the static buildup thing with a dryer sheet that did not work s Meter adjustment also did not work anyone else got any ideas thanks


     
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  2. kc8adu

    kc8adu Active Member

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    fuse lamp?
    is it deaf too?
    they dont get much recieve if the lamp goes.
     
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  3. siltronix_man

    siltronix_man Member

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    maybe ill try the fuse lamp the signals are decent but like the static floor is always real quiet
     
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  4. siltronix_man

    siltronix_man Member

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    Well checked it out swapped with another ft101e lamp i know that works same result
     
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  5. Beetle

    Beetle Well-Known Member

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    RF gain turned all the way up? Maybe replacing the tube used as the meter driver.
     
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  6. siltronix_man

    siltronix_man Member

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    yab rf is all the way up you mean replacing the driver tube?
     
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  7. hookedon6

    hookedon6 W9WDX Amateur Radio Club Member

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    is it inop on all bands or just one band?


    cycle the band switch. they sometimes need the contacts cleaned
     
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  8. Beetle

    Beetle Well-Known Member

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    No, the METER driver - the tube that operates the AGC, which is what the S meter operates from. You'll probably need the manual or a schematic.
     
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  9. AudioShockwav

    AudioShockwav Extraterrestrial Admin Staff Member

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    Beetle, there are only 3 tubes in the 101 radios, the 12by7a is the driver, and the 2 6js6c tubes are the finals in the PA.
    Everything else is solid state.
    Yes you need a Service Manual.
    You can download a copy here, complements of the Fox Tango Group
    http://www.foxtango.org/Manuals/FT-101_SVC_Manual.pdf
    You need Adobe to open it, and it is a big download if you are on dial-up.

    73
    Jeff
     
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  10. AudioShockwav

    AudioShockwav Extraterrestrial Admin Staff Member

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    Down towards the bottom of the manual is a whole section on trouble shooting,.

    Looking at the service Manual,
    : PB1183B is the low frequency IF unit.
    This has the low frequency IF amp, crystal filter(s), detector and AGC/S meter circuitry.
    My first thing to suspect is dry electrolytic caps, these are 40 year old radios, and caps simply do not have a service life that long.
    Look for bulging/leaking caps to start.

    73
    Jeff
     
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  11. Beetle

    Beetle Well-Known Member

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    Woops! Not paying attention again! Thanks for catching that, Jeff. :cry:
     
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  12. AudioShockwav

    AudioShockwav Extraterrestrial Admin Staff Member

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    N/P Beetle, I have sometimers as well :D
    I loved my 101`s when I had them, and made many many contacts with them.
    Just like many radios these are suffering from old components, and first on the list for me is caps that dry out.
    What was great about the 101`s was that if you had 2 radio`s and one quit board substitution will allow you to quickly swap a board and get it down real fast to were the problem is.
    There is a guy on Ebay that used to sell a complete cap set for all of the 101`s to re-cap the whole radio, a very good idea for a radio that is 40+ years old.
    Good Luck.

    73
    Jeff
     
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