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Thread: Yaesu Ft-101 E and F restore

  1. #11
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    Re: Yaesu Ft-101 E and F restore

    Quote Originally Posted by kc4umo
    Quote Originally Posted by AF6LJ
    Quote Originally Posted by kc4umo
    Well the F is putting out 2 whole watts. look out QRP!
    Appears the audio section on TX is working. :)
    There is no indication on IC or ALC. But at least the pre driver stage is tuning on all bands.
    This one may be an easy fix. Strange but I know the RX is down a bit. But the RX quality is great. Best sounding reciever I have in the shack.
    Sounds like the better of two projects :)
    Cool.

    I agree,
    Although the project is more like at 10 at the moment :)

    And thanks for that tid bit on the 745. I never been inside this one so maybe that is all I have to do. I did read at one time in some other thread that the trimmers were most likely to go out. Think I am goingto order the new eeprom when I do it also. This one still has the battery :think
    The new EEPROM board is a great idea.
    I don't know what ICOM was thinking when they chose to place configuration information in volatile ram.
    I'm about half way done with the alignment, taking my time.

  2. #12
    Administrator N8YX's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Quote Originally Posted by AF6LJ
    The new EEPROM board is a great idea.
    I don't know what ICOM was thinking when they chose to place configuration information in volatile ram.
    Battery replacement and reprogram = $$$

    Pretty simple equation, actually.
    "Everyone wants to be an AM Gangsta until it's time to start doing AM Gangsta shit."

  3. #13
    Administrator N8YX's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Quote Originally Posted by kc4umo
    Strange but I know the RX is down a bit. But the RX quality is great. Best sounding reciever I have in the shack.
    The front-end RF amplifier MOSFETs used in those rigs are notorious for going out if subject to overload or high static.

    Lookee here:

    http://foxtango.org/ft101/foxtangoft..._and_PB-1181C0

    If you cannot find one of those FETs, I have a few...
    "Everyone wants to be an AM Gangsta until it's time to start doing AM Gangsta shit."

  4. #14
    Tribal Warrior kc4umo's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Yeah it amazes me why icom did that, as John said $$$$$$


    I may have to take you you on on the FET's. I do not have any. But I have yet to put a tuning stick in the rig yet. Could just be out of alignment or maybe not.
    One of my old mentors told me years ago " Do not tune anything until you have it fixed". That sort of stuck with me over the years and may have saved some money. A guy brought in a 726 a few weeks ago and could not get any RX on 2 meters. The first thing he did was start tuning. Then replaced parts. Then tuned some more. replaced more parts. He replaced the correct part to start with. It was just to the point of being out of tune. Cant beat shot gunning.

  5. #15
    Tribal Warrior kc4umo's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Got no time at all to play with the Yaesu tonight.
    Had to costumers walk in wanting some equipment looked at.
    And I am not even open to the public on Monday nights. LOL
    Mondays are to work on the back log.
    Ended up working on an 101EE and a Heathkit tuner.
    Oh well. Maybe Friday.

  6. #16
    Tribal Warrior kc4umo's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Well, Got up at 3am this morning. Could not sleep.

    Went out to the shack to play with a few things. Put the F on the work bench and removed the covers. I did find out that the bias pot does control output power. I can vary the power from 0 to 4 watts just by turning the bias control. So now tonight I am going to take some voltage measurments in the PA and check for burnt or open resistors. I feel like this one is going to be simple.
    Got to find me another high voltage volt meter. My B&K VTVM bit the dust. Now I am limited to 1000 volts.

  7. #17
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    Re: Yaesu Ft-101 E and F restore

    Quote Originally Posted by kc4umo
    Well, Got up at 3am this morning. Could not sleep.

    Went out to the shack to play with a few things. Put the F on the work bench and removed the covers. I did find out that the bias pot does control output power. I can vary the power from 0 to 4 watts just by turning the bias control. So now tonight I am going to take some voltage measurments in the PA and check for burnt or open resistors. I feel like this one is going to be simple.
    Got to find me another high voltage volt meter. My B&K VTVM bit the dust. Now I am limited to 1000 volts.
    Hmmm
    I'll put a nickle on a blown component in the screen PA supply.
    :)

  8. #18
    Administrator N8YX's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Quote Originally Posted by AF6LJ
    Quote Originally Posted by kc4umo
    Well, Got up at 3am this morning. Could not sleep.

    Went out to the shack to play with a few things. Put the F on the work bench and removed the covers. I did find out that the bias pot does control output power. I can vary the power from 0 to 4 watts just by turning the bias control. So now tonight I am going to take some voltage measurments in the PA and check for burnt or open resistors. I feel like this one is going to be simple.
    Got to find me another high voltage volt meter. My B&K VTVM bit the dust. Now I am limited to 1000 volts.
    Hmmm
    I'll put a nickle on a blown component in the screen PA supply.
    :)
    That, or the driver-to-PA coupling cap which always seems to fail...
    "Everyone wants to be an AM Gangsta until it's time to start doing AM Gangsta shit."

  9. #19
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    Re: Yaesu Ft-101 E and F restore

    Quote Originally Posted by N8YX
    Hmmm
    I'll put a nickle on a blown component in the screen PA supply.
    :)
    That, or the driver-to-PA coupling cap which always seems to fail...
    That's why I only put down a nickel. :)

    One of these days I'll have to pick up one of those.
    That would be a fun project.

  10. #20
    Tribal Warrior kc4umo's Avatar
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    Re: Yaesu Ft-101 E and F restore

    Good suggestions guy's.
    Was there a problem also with the cathode resistors in these rigs?
    Seems I read that somewhere.

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