The Gotham 20101 GAC‑7 Tube is a professional-grade, 6.2 mm seven-conductor cable specifically designed for tube and stereo microphones. It features two larger power conductors (each 0.50 mm², stranded 252 × 0.05 mm) for heater supply, plus five compact signal/control conductors (each 0.14 mm², stranded 72 × 0.05 mm), all insulated in PE and wrapped together with viscose fiber for mechanical stability. The core is protected by a double Reussen-style bare copper shield—both layers offering 100% coverage—under a flexible grey PVC jacket. With conductor resistances under 30 Ω/km for the power lines and under 110 Ω/km for the smaller cores, capacitance below 90 nF/km between conductors and 160 nF/km to shield, and test voltages rated at 500 V conductor-to-conductor and 2,000 V conductor-to-shield, it delivers low-noise, high-fidelity performance. Rated to flex between –5 °C and +50 °C (and –30 °C to +70 °C when fixed), it offers superb flexibility and durability—ideal for high-end tube mic applications requiring both power and pristine audio in a single, reliable cable.

This cable is made for 7-pin tube mic connections.

1 = Jacket: PVC, Ø 6.2 mm, grey Ral 7024
2 = Viscose fiber coat: Counter wrapped to the shields
3 = Shield No. 1: Bare copper wires (0.10 mm) 100% coverage
4 = Shield No. 2: Bare copper wires (0.10 mm) 100% coverage
5 = Insulation A: PE, 1.50 mm Red/Blue
6 = Insulation B: PE, 1.10 mm, White/Yellow/Black/Gray/Green
7 = Conductor A: Stranded bare copper wires 252 x 0.05 mm (0.50 mm²) Red/Blue 252x44AWG = 20AWG
8 = Conductor B: Stranded bare copper wires 72 x 0.05 mm ( 0.14 mm²) White/Yellow/Black/Gray/Green 26AWG

Conductor Resistance (Conductor A): < 30 Ohm/km
Conductor Resistance (Conductor B): < 110 ohm/km
Shielding Resistance: > 15 gohm/km
Capacitance (Conductor-Conductor) < 90 nF/km
Capacitance (Conductor-Shield) < 160 nF/km
Test Voltage (Conductor-Conductor) 500 (RMS)
Test Voltage (Conductor-Shield) 2000 (RMS)
Temperature Range (Flexi-Installed) -5° to +50° C
Temperature Range (Fix-Installed) -30° to +70° C