Vacuum tubes are in excellent condition, no dark rings from use. All the filaments of the 2024 lamps are intact, without damage, checked with a multimeter.
GU-81M
Generator pentode GU-81M with a directly heated tungsten carbide cathode in a glass shell and air cooling.
Designed to amplify power and generate high-frequency oscillations at frequencies up to 50 MHz with an output power of at least 700 W.
The GU-81M pentode is used in transmitters, high-power stages of low-frequency amplifiers and in other radio engineering devices of stationary equipment for general and special purposes.
Produced in glass version.
Cathode tungsten thoriated carbide direct heating.
Socle special with 6 conclusions.
Working position vertical, a socle down.
Cooling air natural or forced.
Overall dimensions of the GU-81M pentode:
- lamp height - 260 mm;
- lamp diameter - 120 mm.
Weight not more than 1 kg.
Guaranteed shelf life of the GU-81M lamp is 12 years from the date of acceptance by the customer's representative.
Operating time not less than 1000 hours
Specifications: SSH3.310.018TU.
Product code: 2 PCS GU-81M High 2024 Power Pentode Transmitting Generator Tube.Tesla Coil.Valve Power Tube.Ryazan.Tested.