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ECC83 (12AX7) unboxed

ECC83 (12AX7) unboxed

R 650.00 ZAR
R 650.00 ZAR
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141 in stock

NOTE: CANNOT MAKE OUT BRAND (95%) !!!

Key Technical Specifications
  • Tube Type: Double/Dual Triode (Audio Frequency)
  • Base: 9-pin Noval (B9A)
  • Amplification Factor (μ): 100 (high gain)
  • Heater Voltage / Current: 6.3V at 300mA or 12.6V at 150mA (center-tapped)
  • Plate Voltage (\(V_{a}\)): Maximum 250V – 300V
  • Transconductance (\(g_{m}\)): ~1.6 mA/V [1, 2, 3, 4, 5, 6]
Common Equivalents and Substitutes
  • Direct Equivalents (Identical Specs): 12AX7, 12AX7A, 7025, CV4004, B339, E83CC, ECC803S [1, 2, 3, 4]
  • Lower-Gain / Modified Substitutes: 5751 (has ~30% less gain, requires different bias consideration), 12AY7 (significantly lower gain, used for cleaner headroom). [1, 2]
Common ECC83 / 12AX7 Variants & Characteristics
Tube / Variant Tone / Character Best Suited For
Standard ECC83 / 12AX7 Balanced frequency response, warm mids, smooth highs. General guitar preamps and Hi-Fi circuits.
ECC83S (e.g., JJ Electronic) Warmer, darker, mid-heavy tone that tames harsh highs. High-gain guitar amplifiers.
ECC803S (Long Plate) Extended low-frequency response and open soundstage. Studio recording rigs and early preamp slots.
7025 / CV4004 Low-noise, low-microphony, clean and balanced. V1 high-gain positions or sensitive phono stages.

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Product Product subtotal Quantity Price Product subtotal
ECC83 (12AX7) unboxed
ECC83 (12AX7) unboxed
ECC83 (12AX7) unboxed
R 650.00/ea		 R 0.00
R 650.00/ea R 0.00