Finals for Yaesu FT-101E

Discussion in 'General Technical Questions and Answers' started by WB2ODO, Mar 10, 2003.

Thread Status:
Not open for further replies.
  1. WB2ODO

    WB2ODO Ham Member QRZ Page

    I need to replace the finals in my old Yaesu FT-101E as there is no output power (the tubes are dark). Does anyone know offhand the full complement of tubes (any drivers and finals) I need and the numbers ? Also, can anyone recommend a source ?

    Thanks and 73's - wb2odo
    Larry
     
  2. K9STH

    K9STH Ham Member QRZ Page

    Although the tubes may be bad, the heaters ("filaments") seldom are bad on all of them. Have you turned them on by the switch on the front panel?

    Glen, K9STH
     
  3. WB2ODO

    WB2ODO Ham Member QRZ Page

    Yes, heater switch is on. This rig has been idle for about 10 years, so not too surprising that the tubes are bad - may be some other problem but it needs new tubes anyway.
     
  4. K9STH

    K9STH Ham Member QRZ Page

    The FT-101E uses a pair of 6JS6C sweep tubes. You DO NOT want those of US manufacture! What you need are those of Japanese manufacture and those are definitely specified by tube sellers. US manufactured tubes often fail within seconds of applying power and most tube sellers will not warranty US made tubes for use in Japanese manufactured rigs.

    The driver is a 12BY7 and it doesn't matter where it was made.

    Now, tubes do not go bad sitting! If none of the tubes "light up" (the heaters show voltage applied by lighting up), the chances are very great that something else is wrong. You need to verify that the heater voltage is actually present on the tubes. Although not impossible, it is very unlikely that all of the heaters opened up with the rig just sitting there with no AC applied.

    Glen, K9STH
     
  5. G4PCI

    G4PCI Ham Member QRZ Page

    just a odd thought as the rig has not been used for 10 years that the plug at the back of the rig has not gone missing
     
  6. N5LRZ

    N5LRZ Banned QRZ Page

    Re Tubes...

    You can probably get tubes from the Yaesu USA parts supplier in CA. Check your browser for the Yaesu web site where you can get a telephone number. Talk to their parts department. BE WARNED, have your good credit card ready. The last time I changed tubes, years and years ago, they wanted an arm and a leg.


    Another thing to remember is that you not only have to put in new tubes but you will very probably have to reneutralize them as well. So if you are NOT a certified tech I strongly suggest just sending the radio back and let the factory guys do the job for you.

    R Arceneaux
    N5LRZ
     
  7. KF6NFW

    KF6NFW Ham Member QRZ Page

    Before my 101E was stolen I had replaced the tubes. While for the most part true, do not use the USA tubes, but if you are unable to find them any where else, then you will ned to adjust the Bias. I have a the manual, and it tells of the needed mesurments. I used a tube supplier from the QST magazine. I believe they came from the Eimac Co., and they where GE tubes. I did have major problems with them until I Biased them. The pilot light on the back panel came on and it got worse from there. Fortunately I did not damage the tubes.
    I miss my 101E, and frequency display, as well as the Phonbe Patch w/ spkr., it was of the Euro release. But who ever made off with it forgot the power cord, and for those familiar will know that, that is critical. I still have the mobile Mic though.
     
  8. AE4FA

    AE4FA Ham Member QRZ Page

    All the tubes are dark. Hmmm . . .

    Is anyone thinking power supply?
     
  9. WA0KZL

    WA0KZL Ham Member QRZ Page

  10. VE3JEV

    VE3JEV Ham Member QRZ Page

    hello there wondered if you checked the heater switch ft101e was my first rig 26 years ago ,then i had a ft901dm for 13 years and never had any trouble with the tubes in any of the rigs ...and today iam using a ft757gx because of the tubes getting hard to get ... lots of good luck 73 de ve3jev [​IMG]
     
  11. wb6bcn

    wb6bcn Ham Member QRZ Page

    Many rigs had a small #24 wire as a filament fuse:  I am not sure if the 101 has one, but that, or a bad solder connection will cause some or all heaters to go dark.  Food for thought.
    The purpose of this is if one of the tubes had a a heater shorted to ground it would take the wire fuse rather than the transformer.
     
  12. PY7CPC

    PY7CPC Ham Member QRZ Page

    I bought a pair 6JSC... finals for my Yaesu FT101 some time back from RF Parts in CA. Check QST,73 Amateur radio for address or e mail.
     
Thread Status:
Not open for further replies.

Share This Page