| Field | Value |
|---|---|
| Title | Full specification & BOM — LEFT |
| Revision | 0.3 |
| Applies to | LEFT enclosure with 6-slot stack, perforated slide-out rear panel, side cable routing, split power rails |
| Parameter | Value |
|---|---|
| Rack shell width | 495.3 mm (19.5 in) |
| Rack shell height | 266.7 mm (6U class) |
| Rack shell depth | 304.8 mm (12 in) |
| Wall thickness | 3.0 mm |
| Rear service concept | Whole perforated rear panel slides out on side rails; captive screw lock + pull handle |
| Cable routing | Side channels reserved for harnessing; tie tabs on both side walls (power on one side, signal on the other) |
| Inter-rack connector concept | 5-pin XLR pair for 2 balanced channel transfer plus RJ45/system link as required |
| Reference STEP | cad/system_q_left_rack_slideout.step |
Each row is also generated as a separate strip PNG for layout checks (same width × 2.84 in height).
mic_pre/MIC_PRE_12CH_19x2.84in_600DPI.pngstrip_harmonic_ladder_19x2.84in_600dpi.pngcompressor_strip_19x2.84in_600dpi.pngeq_strip_19x2.84in_600dpi.pngstrip_fx_19x2.84in_600dpi.png| Item | LEFT — notes |
|---|---|
| Host connection | Single USB to host carries bidirectional digital audio (no separate “USB in” / “USB out” cable for normal stereo I/O). |
| Analog I/O | List mic/line in, line/headphone out, etc. (TBD per PCB). |
| Power architecture | Split supplies: separate analog rails, digital rails, phantom 48V, and tube rails. |
| Analog rails | +15V / -15V (target budget 5A per rail for current planning). |
| Digital / control | +5V (logic/control), optional +12V auxiliaries as needed by cards. |
| Phantom | +48V rail for mic phantom distribution. |
| Tube bank | 12 × 12AX7: heater rail (12.6V class) + B+ high-voltage rail (target set by final circuit). |
Quantities are for one LEFT unit unless noted. Pricing below is budgetary and should be verified at order time.
| Qty | Designator | Description | Mfr part # | Vendor / notes | Unit (USD) | Ext (USD) |
|---|---|---|---|---|---|---|
| 1 | CH-L | Left rack enclosure with slide-out rear panel + rails + side cable channels | Custom fab | Per cad/system_q_left_rack_slideout.step | 450.00 | 450.00 |
| 1 | PSU-24 | AC/DC 24V front-end power supply, enclosed | Mean Well LRS-150-24 | Main front-end feed for split rail architecture | 32.00 | 32.00 |
| 2 | DC15-A/B | Isolated DC/DC dual output +15V/-15V modules | TRACO TEN 40-2415N | Analog rail generation (multiple modules for current headroom) | 58.00 | 116.00 |
| 1 | PH-48 | 48V phantom power module | FiveFish Phantom Gen | Mic phantom rail source | 29.00 | 29.00 |
| 12 | V1-V12 | 12AX7 / ECC83 dual triode tubes | JJ ECC83S (or equivalent) | Shared tube bank for preamp/comp/EQ tube path | 22.00 | 264.00 |
| 12 | SK1-SK12 | Noval 9-pin tube sockets, chassis or PCB mount | Belton Micalex 9-pin (or equivalent) | Match mount style to final tube board | 6.50 | 78.00 |
| 1 | HV-B+ | Tube B+ supply assembly (HV transformer/SMPS + rect/filter) | TBD by tube circuit | Target 200–300V class, budget placeholder only | 180.00 | 180.00 |
| 1 | HTR-12V | Tube heater supply, regulated | TBD by tube circuit | 12.6V class heater rail for 12 tubes | 65.00 | 65.00 |
| 1 | CARD-SET | 6-card electronics set (5 processing + converter) | Custom | Prototype estimate for assembled PCB set | 1500.00 | 1500.00 |
| 1 | IO-CONN | I/O connector set (5-pin XLR male/female, RJ45, TRS, USB, power entry) | Mixed | Back/side panel connector hardware | 260.00 | 260.00 |
| 1 | SRV-PNL | Perforated slide-out rear service panel assembly | Custom fab | Panel + rails + captive hardware set | 140.00 | 140.00 |
| 1 | MECH-HW | Mechanical hardware set (standoffs, screws, rails, handle, tie points) | Mixed | Stainless hardware + cable management | 85.00 | 85.00 |
| 1 | FAN-SET | Cooling set (fans, guards, filters) | Mixed | Thermal control for tube + PSU zones | 95.00 | 95.00 |
| 1 | Estimated subtotal (one LEFT rack) | 3,294.00 | ||||