The new SDR / Monitor Audio Switch will eliminate this problem!
You can manually select the audio source you hear
in your headphones using the front panel switch.
( Your own receiver or a remote SDR audio feed )

When you hit the push to talk switch to trasmit, the audio will switch to
your rig's transmit monitor audio. No more echos. Release the PTT and
you will hear the audio feed selected with the front panel switch.
( Your  local receive audio or remote SDR ).

The SDR / Monitor Audio Switch is built on a quality double sided printed
circuit board using brand name components. ( Murata, Panasonic, CUI,
ON Semi, Switchcraft, and E-Switch ) It is housed in a rugged extruded
aluminum case with laser etched text that will never wear out. It can be
powered with any voltage from 7 to 16 volts AC or DC of any polarity.
Rear panel ground lug is included  to keep stray RF away from your audio signals.


Connection requirements:

PTT input and output:  Standard 1/4" male phone plugs.
Audio inputs: 3.5mm stereo or mono male phone plugs
Power input: 2.1mm coaxial power plug.
Headphones output: 3.5 mm male phone plug.


Listen to Wain VE3DX during a solar event ....recorded using the VE3FEX SDR/monitor switch.
First few seconds is LOCAL receiver from transceiver.
Lastly a much stronger and clear signal from SDR station  K3FEF.

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of the product.

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Do you have a question??
Email Mark VE3FEX



Mark Fex
 VE3FEX
 International Circuits
 1763 Magnolia Ave
 Windsor, Ontario
 Canada N8P 1Z1
519-979-2630