Mini substitution unit using a single rotary switch to select from twelve values all at 5% 0.5W. Values are 100O, 330O, 470O, 680O, 1kO, 3.3kO, 4.7kO, 6.8kO, 10kO, 33kO, 47kO and 100kO. Connections via 4mm sockets.
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