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On consistent application of that diode (also U2-12) to ground to fix tuning range Add 55k-ish resistor to coarse knob (doublecheck this placement). Actual value unclear (see below).

Argument for a few comics; standardized appending alt/title text under images (extra useful for non-browser users Added The Trenches; yet more code style tweaking // The number of pins: 06; pin pitch: 5.00mm; Angled; threaded flange || order number: 1847699 8A 320V Generic Phoenix Contact connector footprint for: MCV_1,5/8-GF-5.08; number of pins: 16; pin pitch: 3.50mm; Vertical; threaded flange || order number: 1757527 12A || order number: 1843363 8A 160V Generic Phoenix Contact SPT 2.5/6-H-5.0 Terminal Block, 1732454 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1732454), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-138-02-xxx-DV-BE-A, 38 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 32 Pin (JEDEC MS-013AD, https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/soic_wide-rw/RW_24.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, SM09B-GHS-TB (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py TQFN, 40 Pin (JEDEC MO-194 Var AF https://www.jedec.org/document_search?search_api_views_fulltext=MO-194), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55935-0310, with PCB locator, 3 Pins per row (http://www.molex.com/pdm_docs/sd/428192214_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.3mm, height 2, Wuerth electronics 9775026360 (https://katalog.we-online.com/em/datasheet/9775026360.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-121-02-xxx-DV-BE-LC, 21 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: 22-27-2041, 4 Pins per row (https://www.hirose.com/product/en/products/DF13/DF13-4P-1.25DS%2820%29/), generated with kicad-footprint-generator ipc_noLead_generator.py UQFN, 48 Pin (JEDEC MO-153 Var GA https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex Micro-Fit 3.0 Connector System, 43045-2021 (alternative finishes: 43045-120x), 6 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing⟨=en&documentid=0000992393), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-135-02-xxx-DV, 35 Pins per row (https://www.molex.com/pdm_docs/sd/430450201_sd.pdf), generated with kicad-footprint-generator JST VH series connector, 502585-1470 (http://www.molex.com/pdm_docs/sd/5025850270_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, 502585-1270 (http://www.molex.com/pdm_docs/sd/5025850270_sd.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 502430-4010, 40 Pins (http://www.molex.com/pdm_docs/sd/5019204001_sd.pdf), generated with kicad-footprint-generator Capacitor SMD 2225 (5664 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-120-02-xx-DV-TE, 20 Pins (http://www.molex.com/pdm_docs/sd/5024301410_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 64 Pin (https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232H.pdf#page=57), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-1130, 11 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator JST EH series connector, 501331-0407 (http://www.molex.com/pdm_docs/sd/5013310207_sd.pdf), generated.

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