Sylvania 807 VT100A

807 VT-100-A Beam Tetrode Sylvania 807 / VT-100-A Type 807 is an indirectly heated beam tetrode designed for use in the output stages of audio amplifiers and as an RF amplifier or frequency multiplier in transmitters. Sylvania 807 / VT-100-A has a low loss micanol base Full specifications for 807 published by STC Sydney March 1958. 43 pages including audio applications. 5.5MB Adobe Acrobat format STC807.pdf Click on pic to see full size image in a new window. Packing shown here.

STC 5B/255M CV391

CV391 / 5B-255M Beam Tetrode STC/ITT CV391 / 5B-255M Finally an 807 type valve with all the connections at one end! This valve is one of a family of british valves designed in the mid-1950's as compact replacements for 807 applications. The CV391 has a loctal base and is of reliable construction. It can be used in all 807 amplifier designs. Within maximum ratings in can be used in 6L6 amplifiers. Sockets to suit available from c20store: 1970's british made loctal PFTE chassis mount Heater Voltage Vh 6.3 volts Heater Current Ih 0.9 amps Full application report available published by STC Sydney January 1955. 1.2M pdf document here STC 5B-2554M.pdf Triode Connected Push-Pull A class AB1 Operating Conditions: DC Plate Voltage 400 volts DC Plate current (max) 125 mA Plate + Screen Dissipation (max) 25 watts DC grid voltage - 45 volts DC Plate current Zero signal 60 mA DC Plate current Max. signal 140 mA Peak AF grid-grid voltage 90 volts Load Plate-Plate 3000 ohms Power Output 15 watts Distortion 3 % click for box pic

Ediswan VT60A

VT-60A Beam Tetrode Ediswan VT-60A (807) VT-60A is a british RAF designation for type 807, produced in the early 1940's. Specifications and characteristics are identical to type 807. click for close up and packing pics.

Philips ECG USA 5933WA 807W

5933WA / 807W Beam Tetrode Philips ECG USA 5933WA / 807W Type 5933WA / 807W is a USA made ruggedised direct replacement for type 807. Base and top cap connections are the same and 5933WA can be directly retrofitted in any 807 equipment without any modification. click for box pic

STC 12E1 CV345

CV345 / 12E1 Beam Tetrode STC/ITT CV345 / 12E1 GEC CV345 / 12E1 12E1 has a 35 watt maximum anode dissipation. Other characteristics are similar to S11E12. The 12E1 uses a octal base and anode top cap connection. Full data for 12E1 available in 390K pdf document thanks to Frank Philipse. Go to Frank's 1 data page cick for box and packing pics.

STC S11E12 CV4060

CV4060 / S11E12 Special Quality Beam Tetrode STC/ITT CV4060 / S11E12 Designed late 1950's for use in series or shunt control circuits. The S11E12 has an international octal base and the important parameters are as follows: Heater Voltage Vh 6.3 volts Heater Current Ih 1.6 amps Anode Voltage Va (max) 800 volts Screen Voltage Vg2 (max) 300 volts Mutual Conductance gm 13.5 mA/V Anode Dissipation Pa (max) 28 watts Cathode Current Ik (max) 300 mA Specially designed to resist shock and is quality tested at all stages of manufacture to ensure maximum life expectancy. Full data for S11E12 available in 350K pdf document thanks to Frank Philipse. Go to Frank's S data page Pinout differs only in one respect to KT88 / 6550 types: Pin 6 is connected to the beam plates. For use in existing KT88 / 6550 applications connect pin 6 to pin 8 at the socket and do not use pin 6 as a tie point.

GEC TT21 CV8286

TT21 / CV8286 Beam Tetrode GEC MO Valve Co. TT21 / CV8286 TT21 beam tetrode designed for use in r.f. power amplifiers, audio amplifier output stages, pulse modulators and series and shunt stabilisers. The TT21 may be used as an alternative to the KT88 in any existing audio designs. Internal construction is identical to GEC MO Valve Co type KT88. Anode connection via 9 mm top cap. Octal base. Characteristics are identical to KT88. TT21 has higher maximum ratings. Full manufacturers specifications published by MO Valve Co March 1965. 24 pages including audio applications in Adobe Acrobat format GECTT21.pdf Click on pic to see full size image in a new window. Packing shown here.

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