Monacor FSI - 6 SWR / Watt / Mod , 2 / 6 / 11 Meter Band in Berlin - Tempelhof | eBay Kleinanzeigen ist jetzt Kleinanzeigen
SWR Watt Meter Monacor FSI-4 und XMTR SWR Gerät in Schleswig-Holstein - Wilster | eBay Kleinanzeigen ist jetzt Kleinanzeigen
SWR -Power Meter Monacor FSI-60 in Kr. München - Höhenkirchen-Siegertsbrunn | eBay Kleinanzeigen ist jetzt Kleinanzeigen
![Would anybody know what the knob in the middle of this meter does? I was given one like this by a friend but not sure how to operate it. Thanks for the Would anybody know what the knob in the middle of this meter does? I was given one like this by a friend but not sure how to operate it. Thanks for the](https://i.redd.it/vwoce0zx5ya41.jpg)