COMET CMX200 SWR Power Cross Needle Meter 1,8-200 MHz
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SWR -Power Meter Monacor FSI-60 in Kr. München - Höhenkirchen-Siegertsbrunn | eBay Kleinanzeigen ist jetzt Kleinanzeigen
MFJ 828 | SWR/power meter/ frequency counter 1,8-54 M
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
Vintage Monarch FSI-5 Combination SWR and Field Strength Meter Made in Japan NOS | eBay