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NR51 vari-mu HF pentode

Size This valve measures 130x43mm overall and has a B7 base.

This valve carries the serial number 7593C (but 7592C on the box), and has Adm Patt 1166 on the base.

Heater voltage 4V
Heater current 1.2A
Anode voltage 200V
Screen voltage 100V
Mutual conductance (Va=200, Vg2=100, Vg1=-2) 2.5mA/V
Capacitances
Ca,g1 (max) 0.006pF
Cin 12.5pF
Cout 10.2pF

 

Pin Function
1 Metallising
2 Control grid
3 Suppressor grid
4 Heater
5 Heater
6 Cathode
7 Screen grid
TC Anode

NR51

Box

This file was last modified 15:18:06, Tuesday September 02, 2014

  FOR SALE: Note that any valve which is not CV marked is now for sale. Contact me via email - see the home page.