Vacuum Tube - 12AT7 / B739, Genalex Gold Lion, Gold Pin
Genalex Gold Lion ECC81/B739 (12AT7) dual triode preamp tube with gold pins. Made in Russia. Original Genalex Gold Lion ECC81/B739 tubes are considered the best 12AT7 types ever made. They are also among the rarest types available. They exhibit a large detailed soundstage that is characterized by an expressive midrange, deep tight bass, and a smooth extended high end. The reissue Genalex Gold Lion ECC81/B739 recreates the sound signature of the original. This tube features balanced sections and gold plated pins.
SKU:
T-12AT7-GOLD-GEN
Item ID:
039534
UPC/EAN:
841358101687
Brand:
Genalex
Type:
| Amplification Factor | ≥ 50 | |
| Capacitance, Transfer | 1.6 pF | |
| Capacitance, input | 2.5 pF | |
| Capacitance, output | 0.4 pF | |
| Cathode to Heater Voltage | 200 V | |
| Grid Circuit Resistance (Rg), Automatic Bias | 1 MΩ | |
| Grid Circuit Resistance (Rg), Fixed Bias | 0.25 MΩ | |
| Grid Reverse Current | 0.5 μA | |
| Heater Current | 165 mA - 330 mA | |
| Heater Voltage | 6.0 - 6.6 V / 12.0 - 13.2 V | |
| Plate Current (Ia) | 18 mA | |
| Plate Dissipation, per triode (Wa) | 3.25 W | |
| Plate Voltage (Ua) | 330 V | |
| Transconductance (S) | ≥ 4.5 mA/V |
| Packaging Dimensions | 2.75 in. × 1 in. × 1 in. | |
| Weight (Packaging) | 0.039 lbs. |
 Specification Sheet | All Models |
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1 answers
Do these work in an Ampeg SVT 4 Pro pre amp?
Asked by Anonymous on May 30th, 2019.
May 30th, 2019
Staff Member
The Ampeg website states that the SVT 4 Pro uses 12AX7 tubes, but if you were looking to reduce the gain in your amp, these might be good replacements.
0 answers
Doesn't anyone know the original Genalex preamp tubes were ALL rebranded Mullards? I meet up with an old mate of mine who worked for Genalex, and Pye Radio in The UK. Granted all the surviving GEC employees, I know, still love to bash Mullard, probably because GEC pretested all the stuff they bought from Mullard. If it is not a kinkless tetrode, it is not really a Genalex. The Mullard Master 10M gold label, was equal to or better than the GEC-MOV stuff, and was also pretested and specially selected.
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