[1000mp] FT1000MP Tx Audio/RF Leaking to Speaker

[1000mp@mailman.qth.net]

Hi - wonder if anyone has seen this problem in the past.

On keydown a large "Clunk" is heard through the speaker
And you can hear the TX slightly, its as if the RX is not totally switching 
off.
To be honest have had it for sometime, but its getting slowly worse

Have ferrites on all mic leads and even get it when running into a dummy 
load.
I then connected an external extension speaker (again with ferrites on the 
leads) and the bassiness of this speaker makes it sound even worse.

Have an MD100 mic and have also tried a stock mic with no difference.
You also hear the "Clunk" with the mic disconnected when pressing the MOX, so 
I think this rules out any mic problems.

If you turn the RF power down to zero then the problem is not apparent (did 
this on SSB and just dead key'd the rig with the MD100 and you hear nothing).It 
seems as you increase the RF PWR knob it appears. At QRP levels of only 1w 
you can distinctly hear it.

It's as if RF is leaking back somewhere - any suggestions appreciated
73 Steve G0UIH/VK2IAY/3D2FI


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