Yaesu FL-2100 high input SWR on 15m only

Discussion in 'Amateur Radio Amplifiers' started by F8BDX, Jan 22, 2016.

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  1. F8BDX

    F8BDX Ham Member QRZ Page

    my FL2100B, there are 4 of ROS at the entrance of the band of 15m.
    Adjusting the coil The 205 does not correct the problem

    the port to send it to repair and return of § 150 + repair at least 150 §

    please, which I called MICA condensteurs wire must be changed to 15m.
    the characteristics of what to buy, and where to buy it.
    ceramic capacitors are OK (not cracked), the Bandwitch is OK, and other bands are OK.
    please, it's been too expensive for the Port, thank you.
  2. KO6WB

    KO6WB Premium Subscriber QRZ Page

    You're on the right track. You probably need to look at C212/C216 or the contact for the input portion of the bandswitch.
    A bit of DeOxit works well on the contacts.
    If you have an antenna analyzer, then you can do more troubleshooting by connecting the analyzer to the input of the 2100.
    Key the amplifier and with the bandswitch on the 15m selection, scan for the best SWR.

    Hope this helps
  3. F8BDX

    F8BDX Ham Member QRZ Page

    Gary thank you for your help.
    Rated is, but I saw some om have replaced the wire capacitors.
    or find them, and take any reference to 15m?
    if you have a direct link
    ceramic capa are OK (not cracked)
    Thank you
  4. F8BDX

    F8BDX Ham Member QRZ Page

  5. N8VIL

    N8VIL Ham Member QRZ Page

    I replaced all the input capacitors on my FL-2100B. I replaced all the rectangular brown capacitors but left the doorknob style input capacitors as they checked good. I used 1000 volt rated silver mica capacitors. After replacement I was able to adjust the input SWR very low.

    Before replacement photo.


    After replacement.

  6. N8VIL

    N8VIL Ham Member QRZ Page

    I purchased my replacement input tuning capacitors from www.justradios.com as they were the only place I found to have the exact replacement values (I did not want to substitute values). I replaced the capacitors in the input circuit and the grid by-pass capacitors for good measure.
  7. F8BDX

    F8BDX Ham Member QRZ Page

    Thank you all for your help.
    Congratulations my work and pictures.
    it's very beautiful work.
    also thank you for the link to buy the parts, but first I must disassemble and watch.
    QRO 73 and thank you to all.
    Sincerely, Jose
  8. VE3TMT

    VE3TMT XML Subscriber QRZ Page

    Looks like two different amps to me.
  9. N8VIL

    N8VIL Ham Member QRZ Page

    They are. I never took a picture of my amp before I changed out the capacitors. But mine looked just like the before photo.
  10. F8BDX

    F8BDX Ham Member QRZ Page

    Thank you all for your help
    I think I have to order C214 C218 C213 C219 C220 and MICA 1000V MONEY ???

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