6L6GC Current Production Comparison
6L6GC Current Production Comparison
Electrical Specifications, Measured Frequency Gain & Tonal Analysis
Testing Methodology
Each tube in this comparison was installed in the same custom-built, fixed-bias single-ended guitar amplifier to obtain voltage gain measurements and conduct listening tests. Samples were calibrated to a middle range idle plate current draw using a Maxi-Matcher Digital Tube Tester.
Plate Current (Ia): 24 mA
Plate Voltage (Va): 400 VDC
Control Grid (Vg1): -48 VDC
Test Load: 8 Ohms (Secondary)
* Voltage sweeps (10Hz to 20kHz) measured gain at key points: Lows (50Hz), Mids (700Hz), and Highs (6kHz).
T-6L6GC-WC — Winged C / SED
Made in Russia| Maximum Ratings | |
|---|---|
| Plate Volt (Va) | 500V |
| Grid Volt (Vg2) | 500V |
| Plate Power (Wa) | 30W |
| Filament Data | |
| Filament Volt (Vf) | 6.3V |
| Filament Curr (If) | 0.9A |
Measured Gain Response (dB)
Lows
Mids
Highs
Seated Height: 3.66"
Glass Diameter: 1.53"
Guitarist's Opinion: Direct, focused tone with an emphasis on crisp high frequencies ideal for sizzling lead lines.
T-6L6GC-STR-T — Tung-Sol Reissue
Made in Russia| Maximum Ratings | |
|---|---|
| Plate Volt (Va) | 500V |
| Grid Volt (Vg2) | 500V |
| Plate Power (Wa) | 30W |
| Filament Data | |
| Filament Volt (Vf) | 6.3V |
| Filament Curr (If) | 0.9A |
Measured Gain Response (dB)
Lows
Mids
Highs
Seated Height: 3.19"
Glass Diameter: 1.44"
Guitarist's Opinion: Extremely well-balanced, smooth overall character with rich warmth across all registers.
T-6L6GC-JJ — JJ Electronic
Made in Slovakia| Maximum Ratings | |
|---|---|
| Plate Volt (Va) | 500V |
| Grid Volt (Vg2) | 450V |
| Plate Power (Wa) | 30W |
| Filament Data | |
| Filament Volt (Vf) | 6.3V |
| Filament Curr (If) | 0.9A |
Measured Gain Response (dB)
Lows
Mids
Highs
Seated Height: 3.88"
Glass Diameter: 1.44"
Guitarist's Opinion: Fat and smooth low end with top-end sparkle. Delivers more attack and bite than most competitors.
T-6L6GC-TAD — Tube Amp Doctor
Made in China| Maximum Ratings | |
|---|---|
| Plate Volt (Va) | 550V |
| Grid Volt (Vg2) | 450V |
| Plate Power (Wa) | 30W |
| Filament Data | |
| Filament Volt (Vf) | 6.3V |
| Filament Curr (If) | 0.9A |
Measured Gain Response (dB)
Lows
Mids
Highs
Special Order Item
Contact Evatco for Specs
Guitarist's Opinion: High plate-voltage tolerance with a punchy, tight mid-range dynamic response.
