[Elecraft] KX3 drifting downwards

[André ..]

Hello to everyone .

I have a brandnew KX3 and have the following problem .

Using the KX3 in SSB or CW mode then he start to drift downwards with 1Khz almost every time when the KX3 going in TX mode  (push the mic or footswith or  the keyer ) .

In Data mode there is no problem ..using wsjt-x


Configuration  :

1.      Power Supply  DM-330MVE  = 13,8V dropping in TX to 13,6 V

2.      KX3 10242 connected with all original cable from Elecraft  to the power supply and PC



 On FT8 mode  freq : 5.357

Power : 0,9 watt  on kx3

Start at   : Osc = 27 ° Celsius

After 15 min : 31 °

After 60 min : 34 °

No drifiting !!!!!!!!!



On FT8 mode  freq : 14.074

Power : 1 watt  on kx3

Start at   : Osc = 34° Celsius

After 15 min : 35 °

After 60 min : 37 °

No drifiting !!!!!!!!!!!



On SSB / CW mode  freq : 14.290

Power : 1watt  on kx3

Start at   : Osc = 29° Celsius

After 15 min : 33 °

After 30 min : 35 °

Drifiting downward !!!!!!!!!!!!!!!!!







 ​My  KX3 is drifting when I use USB or CW mode  NOT on FT8 mode with the same configuration  .

1.      He start to drift downward every time when  go to TX  (  push   the PTT ( or foot ) switch  ) or the keyer .

2.      Blocking  VFO A  make no different .

3.      When I work SPLIT  in SSB VFO A  is drifting  downwards and VFO B stay stable !!!!!!!!!!!!!!


When I have a pileup and qso's  going very fast  I must correct continuously adjust the frequency with the dial knob



It seem that this NOT a temperature problem  , does anyone have the same problem


73' André C5YK /ON7YK

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