[Yaesu] FT-1000MP dies when warmed up

[on4kj]

  Hello John,

  Probably a very stupid answer, but are you sure de back-up batt. is still
OK?
  If not, it will disturb the whole program set-up.

  Jos on4kj


  ----- Original Message ----- 
  From: "W0UN -- John Brosnahan" <shr at swtexas.net>
  To: <yaesu at contesting.com>
  Sent: Friday, March 12, 2004 7:16 PM
  Subject: [Yaesu] FT-1000MP dies when warmed up


  > While waiting for a copy of the Technical Supplement to
  > arrive from Yaesu for the original FT-1000MP (BTW  they
  > just received a few from Japan--so they are back in stock
  > apparently) I decided to fish for some answers here on
  > the reflector.
  >
  > I have a stock MP (NOT Mark V or Field) with Inrad filters.  It has
  > been working for the past year--it was purchased used but worked
  > flawlessly until now--but it has recently developed the problem of
  > the receiver dying after an hour or so of receiver operation.
  >
  > If anyone has an experience with these issues I would appreciate
  > hearing from you.
  >
  > Here are the symptoms---
  >
  > --It runs for an hour plus and then dies.  But the death is not
instantaneous
  >          but rather it takes a few (couple of) seconds for it to fade
out.
  >
  > --In dual RX both channels die--since the phased locked loops
  >          are separate this would indicate that it is not a synthesizer--
  >          but rather a problem in an area common to both RX channels
  >
  > --When I hit the MOX button, putting it into TX it will return to RX OK
for
  >          a few seconds and then it fades out in another second or two
  >
  > --Initial indications are that it is on ALL bands--so it is not a band
pass
  >          filter problem in the front end.
  >
  > --The fadeout is in the RF since the S meter also stops
indicating--rather
  >          than in an audio stage.
  >
  > --No display flashes -- once again making me think it is not the
  >          synthesizers.
  >
  > --The failure appears to be the same whether the antenna is hooked
  > up to either A or B position OR even hooked into the direct RX position.
  >
  > Maybe I just need to get on the air and do some high-speed QSK CW
  > to exercise the antenna relay.   But once it heats up it will only
recover
  > for a second or two when it is switched into transmit and then back to
  > receive, no matter how many times I try to exercise the relay.
  >
  > THANKS--John   W0UN
  >
  >


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