Ball Engineering 500 Variometer (Rate of Climb) Info

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Brooke

Airman
37
15
Oct 15, 2018
www.prc68.com
Hi: Looking for how to use the 3-way switch A-(center)-V and the knob "VOL". Also any documentation. Wallace & Tiernan FA 181 Altimeter
Ball500Varo-03s.jpg
 

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