GU50 ГУ50 LS50
RUSSIAN TUBE AUDIOPHILE PENTODE MATCHED PAIR with PARAMETERS

Tested in triode
mode with L1-3 tube tester.

Testing parameters/values : Uf 12,6V , Ua = 300V,Rk = 400R

Judging by the appearance and measurement results - it seems that it has not
been used

Measurement results - PICTURE #2 .The pairs are formed based on the value of
the anode current.

The date of manufacture may vary.

Ambient
temperature, °C -10 to +55.

Relative humidity at up to +25 °C, % 98.

Electrical
Parameters:

- Heater voltage,
V 12.6,

- Heater current, A 0.6-0.85,

- Mutual conductance (at anode voltage 800 V, grid 2 voltage 250 V, grid 1
voltage increment 5 V, anode current 50 mA), mA/V 3 - 5.5,

- Bias voltage at operating point, V 25-55,

- Penetration factor of grid 1 relative to grid 2, % 16-26.

Interelectrode
capacitance, pF:

- input, at most
13-15,

- output, at most 10.3,

- transfer, at most 0.1.

Output power, W,
max.:

- at anode voltage 800 V, grid 2 voltage 250 V, grid 1 voltage -100 V, anode
current, at - most 150 mA 55,

- over 1,750 h of service 40.

Weight - 102 gr.

*

Shipping:

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by Registered and priority Lithuania Post Delivery service.

Tracking number
will be provided. 

Estimate delivery

time is 10-40 working days.