Cambridge Thermionic Voltmeter Type B

Dati

Forum

Immagini

Collezioni

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

Specifiche tecniche

Annotazioni
Cambridge Thermionic Voltmeter, Model B, was developed to complement the Model A.

It addressed the limitations of Model A to meet a broader set of measurement needs. The key differences between the Type A and Type B Cambridge Thermionic Voltmeters (Moullin Voltmeters) are:
1. Voltage Range:
- Type A: 0 to 5 volts
- Type B: 0 to 10 volts
2. Circuit Design:
- Type A: Does not use an anode battery. The filament battery supplies both the filament current and the negative grid bias.
- Type B: Uses a separate anode battery and applies negative grid bias through a high resistance.
3. Input Impedance:
- Type A: Requires an external conducting path between grid and filament.
- Type B: Can be used where there is no conducting path between grid and filament.
4. Precision:
- Type A: Scale is divided to 0.02 volt over most of the range.
- Type B: Can be read accurately to 0.5 volt.
6. Application:
- Type A: Suitable for very low voltage measurements with high sensitivity.
- Type B: More suitable for higher voltage measurements and in circuits without a direct grid-filament path.
Both types use anode-bend rectification, relying on the curvature of the anode-current grid-voltage characteristic for their operation. The Type B model appears to be more versatile in terms of circuit compatibility and voltage range, while the Type A offers higher precision for very low voltage measurements.

Bibliografia
Elektrische Gleichrichter und Ventile, Prof. Dr.-Ing. A.Güntherschulze of the Physikalisch-Technisch

Autore
Modello inviato da Wolfgang Müllner. Utilizzare "Proponi modifica" per inviare ulteriori dati.

Altri modelli
In questo link sono elencati 17 modelli, di cui 17 con immagini e 9 con schemi.
Elenco delle radio e altri apparecchi della Cambridge Scientific Instrument Co.; Cambridge

Collezioni | Musei | Letteratura

Forum