View cart Checkout

Vacuum Tube - 12AT7 / B739, Genalex Gold Lion, Gold Pin

Click to zoom in

Customer Images:

No Images yet! Submit a product image below!


SKU:	T-12AT7-GOLD-GEN
Item ID:	039534

Price: $43^.95

In Stock

View Specifications, Files, and Documents

Type

Preamplifier 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.

UPC/EAN: 841358101687

View Product Measurements

My Project Lists

Specifications, Files, and Documents

Specification Sheet

1.88 MB

Product Measurements by Type (click to expand)

Product Measurements by 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 (R_g), Automatic Bias		1 MΩ
Grid Circuit Resistance (R_g), 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 (I_a)		18 mA
Plate Dissipation, per triode (W_a)		3.25 W
Plate Voltage (U_a)		330 V
Transconductance (S)		≥ 4.5 mA/V

Packaging Information
Packaging Dimensions		2.75 in. × 1 in. × 1 in.
Weight (Packaging)		0.039 lbs.

Add a review

Product Reviews

No product reviews yet! Be the first!

Questions and Answers

Click each question to see its answers.

Do these work in an Ampeg SVT 4 Pro pre amp? 1 answers

report this

Asked by Anonymous on May 30th, 2019.

Answers (1)

BradWbr

Staff Member

May 30th, 2019

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.

report this

Answer this question

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. 0 answers

report this

Asked by Anonymous on March 2nd, 2017.

Answers (0)

No answers yet!

Answer this question

Have a question of your own? Ask us here!

Terms and Conditions