@Bernte_one:
Maybe you can do that in a different way.
Fix the TX cap at 330nF.
Start with a RX cap value of 100nF.
Connect the first input of an oscilloscope to Tx signal.
Connect the second input of the same oscilloscope to Rx signal.
Adjust the same amplitude and timebase on both oscilloscope channels.
Set GEB and DISC pots to zero.
Now you should be able to see the "initial" phase shift between RX and TX.
Step by step increase the value to the RX cap. until you reach the good shift value (20° for a DD coil ou 200° for a concentric coil).
ie. : 100nF >>> 104.7nF >>> 109.4nF >>> etc ...
Note : During the adjustment, you will see the RX signal increase and decrease around a special point. You shouln't adjust your coil at this point, it will not works properly. The good setting point is a bit before or after it.
Good luck,
Hugo
Maybe you can do that in a different way.
Fix the TX cap at 330nF.
Start with a RX cap value of 100nF.
Connect the first input of an oscilloscope to Tx signal.
Connect the second input of the same oscilloscope to Rx signal.
Adjust the same amplitude and timebase on both oscilloscope channels.
Set GEB and DISC pots to zero.
Now you should be able to see the "initial" phase shift between RX and TX.
Step by step increase the value to the RX cap. until you reach the good shift value (20° for a DD coil ou 200° for a concentric coil).
ie. : 100nF >>> 104.7nF >>> 109.4nF >>> etc ...
Note : During the adjustment, you will see the RX signal increase and decrease around a special point. You shouln't adjust your coil at this point, it will not works properly. The good setting point is a bit before or after it.
Good luck,

Hugo
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