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Dual gang 50kΩ 16mm logarithmic taper potentiometer with spline tooth shaft This potentiometer can be used in the Stereo Valve Preamplifier. This value is hard to get in this style of pot but it suits driving devices with a relatively high load impedance. Note that because it has a spline shaft, not all types of knob will necessarily fit. The types with a grub screw generally work OK, or those designed for spline shafts. Also the shaft is quite short, which means you won't have to cut it down but it will not protrude a long way through a thick panel either. Cat No SC3385. Price: AUD $5.00 1  Add to trolley In stock: yes (4 available). Estimated dispatch time: 1-3 days Related to: Project: Valve Stereo Preamplifier For HiFi Systems (January 2016 [print issue] [online issue]) Project: Valve Stereo Preamplifier For HiFi Systems, Pt.2 (February 2016 [print issue] [online issue]) Other items relevant to these projects: Stereo Valve Preamplifier PCB [01101161] ($15.00) Add to trolley STFU13N65M2 650V logic-level Mosfet ($10.00) Add to trolley Red & White PCB-mounting RCA sockets ($4.00) Add to trolley Hard-to-get parts for Stereo Valve Preamplifier ($30.00) Add to trolley Hifi Stereo Valve Preamplifier clear acrylic case pieces ($20.00) Add to trolley Stereo Valve Preamplifier PCB pattern (PDF download) [01101161] (Free) Add to trolley Laser cutting artwork and drilling diagram for the Hifi Stereo Valve Preamplifier (PDF download) (Free) Add to trolley