Yaesu Fl2100 bypass may be stuck ??

Discussion in 'Amateur Radio Amplifiers' started by KG4RSF, Mar 18, 2018.

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  1. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    With any luck, only the fuse.

    Sounds like you turned it on without defeating the cover safety interlock. Don't do that.

    Actually, if you're not sure what you're doing, don't ever remove the cover without the AC power cord unplugged.
  2. G3YRO

    G3YRO Ham Member QRZ Page

    You'll have blown up the resistor that is there to discharge any residual HT when you remove the mesh on top of the PA compartment. Obviously you should never do that with the power on !

    Hopefully you haven't done any other damage, although you may have blown some of the rectifier diodes.

    As others have said, you really should read through the Manual before you do anything (if you didn't get one with the Amp, you can easily download one online)

    And you are much better doing resistance checks with the power OFF than doing anything with the power on. You need to be very careful, as one mistake with these kind of voltages and you will be Silent Key.

    And please answer these questions:

    1. Are the Links in the right place for the Mains voltage you are using?

    2. What does the HV voltage meter read?

    3. Does the relay go over REGARDLESS which position the STANDBY/OPERATE switch is in?

    4. What is the PA Standing current?

    Roger G3YRO
    Last edited: Mar 20, 2018
  3. KG4RSF

    KG4RSF Ham Member QRZ Page

    anybody notice anything IMG_6350.JPG IMG_6351.JPG IMG_6352.JPG
  4. KG4RSF

    KG4RSF Ham Member QRZ Page

    1 links correctm for 120
    2 hv reads in middle
    3 i am using a ameriton 704 i also tried just touching a wire between rly and g
    4 the only thing that ready is the hv gauge in the middle

  5. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    What's the HV meter indicate "in the middle?"

    Shouldn't the HV be around 2400Vdc? What's it indicate?
  6. KG4RSF

    KG4RSF Ham Member QRZ Page

    the meter stay in the middle when i turn it on
  7. KD2ACO

    KD2ACO Platinum Subscriber Platinum Subscriber Life Member QRZ Page

    Where the red line is?
    FL2100 front.jpg

    That indicates trouble somewhere. It could be a few things. How comfortable are you with a multimeter and soldering iron?

    I can only judge the situation with the pictures you posted, but it looks like that amp has seen hard times and a corrosive environment. It will take some careful work to get it going.
    Last edited: Mar 21, 2018
  8. KG4RSF

    KG4RSF Ham Member QRZ Page

    the needle is 1 click above the 2
    As soon as i give power relay clicks.
    I can use a solder iron, not well, but it will pass. I have a meter, but what do i measure ??

    thx for help marc
  9. W1QJ

    W1QJ Ham Member QRZ Page

    I have a meter, but what do i measure ??

    I think you better not do that.
    KD2ACO likes this.
  10. KA9JLM

    KA9JLM Ham Member QRZ Page

    If the meter has 2 in the center it sounds like the meter has been replaced.

    Is this jumper installed ?

    Last edited: Mar 21, 2018

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