Tube neuf , jamais monté ,
dans son emballage d'origine légèrement défraichi . Tube GP-5 is a
glass-envelope beam power triode intended for use as a shunt regulator or pulse
modulator in high-voltage systems. It features anode operating voltage of 30 kV
and a plate dissipation of 37.5 watts. Originally intended for color-TV voltage
stabilization, the GP-5 is similar to the Telefunken ED500 and may be used to
retrofit equipment which uses the American type 6BK4 or other high-voltage beam
triodes. Near equivalent: ED500 and 6BK4. General characteristics: Name: GP5
Cathode: oxide-coated, unipotential Voltage (AC or DC), V: 6.3 (± 0.6) Current,
mA: 210 (± 20) Heater-cathode voltage, peak, V: ±200 Amplification factor
(nominal): 2750 Transconductance (nominal), uS: 700 Interelectrode capacitances
(typical), with cathode grounded: - Input 4.0 pF - Output 1.5 pF - Feedback 0.1
pF Mechanical characteristics: Base standard magnoval, glass button Socket
Svetlana SK509 or similar Anode cap approx. 3/8 in (9 mm) diameter Anode
connector same as 6BK4 or 807 Operating position Any (vertical for convection
cooling) Nominal dimensions: - Height of glass envelope 100 mm (3 7/8 in) -
Diameter of glass envelope 46 mm (1 3/4 in) - Overall height 125 mm (4 7/8 in.)
Net weight, g: 115 Maximum ratings: Anode voltage, kV: 30 Anode dissipation, W:
37.5 Anode current, continuous, mA: 2 Grid voltage, V: -450 Maximum
grid-circuit resistance, megohms: 3 Envelope temperature, C: 250