[1000mp] Brand New FT1000MP Field glitches

[Jim Smith]

Fred,

I have found that plugging anything into the front panel jacks on my MkV 
causes RF to get into the monitor audio.  I now use the jacks on the 
back.  I do have RF in the shack.

73 de Jim Smith   VE7FO

50mhz wrote:

>Fellows
>
>I have purchased last month a second FT1000MP . I have been using the first
>one for the last two years, so I have quickly went thru all the functions
>and found this two problems on the new one. Perhaps some of you could me
>help on this :
>
>1) The VCC metering is not working. The voltage scale lights but no voltage
>indication.
>Missing connection ?  unplugged wire ?
>
>2) The side tone has a low frequency RF feedback on it. This is the most
>annoying problem
>
>Description : When on CW, listening to the side tone, there is a low
>frequency RF feed back bumping the earphones and/or the speaker. It is not
>loud but annoying, mostly if  one is used to operate CW with low level side
>tone.
>
>Where the problem is presented : Earphones, Speaker, External Speaker. It
>does not appears in the AF-Out output.
>
>More : The HUM is there regardless the volume position and regardless the
>side tone level (VR 5001). Even with NO side tone level it is there
>constantly. For RF levels of 25W or less there is no RF HUM.
>
>What I did to start investigation : I turned down VR 3001 to zero (no more
>audile beeps or side tone). RF feedback still  present. I have disconnect
>JO29 Flat Cable to open Side Tone and Beep signal path from the control
>board to the AF Board. RF Feedback remains.
>
>What I think : RF is been picked up somewhere in the AF stages. RF must be
>bypassed (by means of decoupling capacitors) in the Audio Amplifier. Has
>Anyone experienced the same problem ? Any tip where to apply the bypasses.
>
>
>Thanks
>
>PY2XB
>Fred Carvalho
>py2xb at integral.com.br
>
>Fred Carvalho
>fcarvalho at integral.com.br
>Integral Sistemas e Com Ltda
>Sao Paulo - Brasil
>Tel 55-11-5545 2600
>Fax 55-11-5545 2601
>http://www.integral.com.br
>
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