6923

6923 is also designated EA52.

General

The 6923 is a measuring diode for frequencies up to 1000 Mc. It has a coated, unipotential cathode and may be mounted in any position. The eccentricity of the plate pin with respect to the cathode connection is 0.01 inch maximum.

Ratings

The heater requires 6.3 volts at 300 milliamperes, with a maximum heater voltage of 7.0 volts and a minimum of 5.6 volts. The capacitance between plate and cathode is 0.5 micromicrofarads maximum. The peak inverse plate voltage is 1000 volts maximum at frequencies below 100 Mc; at frequencies higher than 100 Mc, it is 1000 divided by the frequency in Mc volts maximum. The cathode current is 300 microamperes maximum, and the peak cathode current is 5 milliamperes maximum. The voltage between heater and cathode is 50 volts maximum, with a circuit resistance between heater and cathode of 20000 ohms maximum. The plate voltage at a plate current of 0.5 milliampere is 3 volts maximum.

Construction Notes

The TESLA datasheet states that the EA52 replaces the American type 6923. The EA52 is described as an all-glass subminiature tube with two free leads serving as heater connections, an anode brought out at the top of the bulb by a gilded pin, and a cathode brought out by a sealed-in metal ring on the circumference of the bulb in its upper part. It has indirect heating and an oxide cathode, and may be powered in parallel or in series with alternating or direct current. The EA52 is mounted in equipment by means of a spring clip which also forms the cathode lead. The eccentricity of the anode lead with respect to the cathode ring is at most 0.25 millimeter. The leads may be bent at a distance greater than 2 millimeters from the seal, and the soldering point must be more than 7 millimeters from the seal. The base consists of free leads, and the weight is 6 grams maximum. The EA52 has an anode-to-cathode capacitance of less than 0.5 picofarad, an anode voltage of less than 3 volts at an anode current of 0.5 milliampere, and an insulation resistance between anode and cathode greater than 10000 megohms. Its inverse voltage is 1000 volts at frequencies below 100 Mc/s and 1000 divided by the frequency in Mc/s volts at frequencies above 100 Mc/s. The cathode current is 300 microamperes maximum, the peak cathode current is 5 milliamperes, the voltage between cathode and heater is 50 volts, and the external resistance between cathode and heater is 20 kilohms.

Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.

Original manufacturer datasheets for 6923, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• 6923
• MĚŘICÍ DIODA (filed under EA52)