RX antenna - K9AY loops switch with remotly VARIABLE Rload

Assembled KIT

Why variable Rload???

- look at far field plots from MMANA

• [bigger MMANA far field https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/mmana_vac_big.png]

The drill drawing

Paste the drawing on the box and fix it with some tape.

Voltage controlled resistor

- insert VAC plus to plus - check package

Protection diodes

- solder 5 + 5 diodes

- these diodes protect Rload resistor against high power, electrostatic etc.

KIT - all parts you need

KIT - all parts you need

TRANSFORMERS winding - very important thing!

Front side

Front side

Common-mode coax choke

Wind the coax

- Wind the coax as is on the picture, there should be 7 or 8 turns.

- fix it by one binder and use second one to fix choke to the PCB

Solder the coax

KIT - all parts assembled.