A modern valve made in Russia and selected by the Tube Amp Doctor for exceptional characteristics. These are really good valves and for a pretty good price...I can get these quite readily in about 7 days from order if they are not to hand.

Triode 1
Source ........................................ RCA RC-29 - 1975
Input ........................................... 3.2 pf
Output ........................................ 0.4 pf
Grid to Plate................................. 2.6 pf

Triode 2

Input ........................................... 3.2 pf
Output ........................................ 0.5 pf
Grid to Plate ................................ 2.6 pf

Maximum Ratings (Design Center Values)

Triode 1

Plate Voltage ............................... 300 V
Plate Dissipation .......................... 3.5 W

Triode 2

Plate Voltage ............................... 300 V
Plate Dissipation .......................... 3.5 W

Characteristics and Typical Operation

Class A Amplifier

Plate Voltage ................................... 250 V
Grid No. 1 Voltage ............................ -10.5 V
Amplification Factor ........................... 16.5
Plate Resistance (approx) ................... 5.3K Ω
Transconductance .............................. 3100 µMho
Plate Current ..................................... 11.5 mA