Discontinued Elecraft E850402 KSYN3 Assy w/Stiffener

Elecraft E850402 KSYN3 Assy w/Stiffener

This modification adds a plate to stiffen the KSYN3 synthesizer board to reduce the effects of mechanical vibration on the KSYN3 voltage-controlled oscillator (VCO).

Such vibrations may occur in rare cases when the internal speaker is used at very high volume or with certain sidetone frequencies.

If your K3 is equipped with the KRX3 subreceiver it will have two KSYN3 synthesizers. Both boards should be modified if the user chooses to make this modification.

The modification may require removing a leaded resistor and replacing a surface mount resistor on the KSYN3board. Detailed instructions for doing this without special SMD handling tools are included.

Also, you will need a temperature controlled ESD-safe soldering iron with a fine tip and fine rosin core solder and a DMM for making resistance measurements.