Antique radios, Old Time Radios

Vacuum Tube Voltmeter 400H (400 H) (6625-557-8261)

ID = 81359

Hewlett-Packard, HP;: Vacuum Tube Voltmeter 400H [Equipment] ID = 447184 579x700

Country: United States of America (USA)	Manufacturer/Brand: Hewlett-Packard, (HP); Palo Alto, CA
Year: 1957 ??	Type: Service- or Lab Equipment
Valves / Tubes	8: 6CB6 6CB6 6CB6 6CB6 6CB6 6AX5 12B4A 6U8 5651

Principle	not available
Wave bands	n/a no information
Power type and voltage	Alternating Current supply (AC) / 115/ 230 Volt
from Radiomuseum.org	Model: Vacuum Tube Voltmeter 400H
Material	Metal case
Shape	Tablemodel, with any shape - general.
Dimensions (WHD)	7.5 x 11 x 12 inch / 191 x 279 x 305 mm
Notes	Model 400H has a 5” indicating meter with mirror scale and measures voltages from 0.1 mv to 300 volts. The high input resistance of 10 megohms effectively minimizes loading to circuits under test. A highly stabilized amplifier with 56 db feedback provides exceptional long term stability; even line voltage changes of *lo% cause negligible variations. Readings are direct in volts or db. Operation is extremely simple; input voltages up to 600 volts peak will not damage the instrument. The instrument is of highest quality construction throughout, and is available either in the lightweight, rugged -hp- portable cabinet or for rack mounting. Stabi 5651, 12 Messbereiche 1mV-300V, -72dB bis +52dB, 10Hz-4MHz.

This model was suggested by Bernd Pötzsch.

All listed radios etc. from Hewlett-Packard, (HP); Palo Alto, CA
Here you find 154 models, 119 with images and 47 with schematics.

Forum contributions about this model
Hewlett-Packard, HP;: Vacuum Tube Voltmeter 400H
Threads: 1 | Posts: 1

Hits: 339 Replies: 0 hp: 400H (400 H) (6625-557-8261); Vacuum Tub
Arpad Roth 12.Jul.05	1 hp: 400H (400 H) (6625-557-8261); Vacuum Tub For more information see: http://www.radiomuseum.org/dsp_modell.cfm?model_id=81357

Hewlett-Packard, HP;: Vacuum Tube Voltmeter 400H
End of forum contributions about this model