Vacuum Tube Voltmeter 400 HR
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Hewlett-Packard, HP;: Vacuum Tube Voltmeter 400 HR [Equipment] ID = 447182 933x337
Select picture or schematic to display from thumbnails on the right and click for download.
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| Year: 1957 ? | Category: Service- or Lab Equipment | ||||
| Valves / Tubes | 8: 6CB6 6CB6 6CB6 6CB6 6CB6 6AX5 12B4A 6U8 5651 |
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| Wave bands | - without |
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| Details | |
| Power type and voltage | Alternating Current supply (AC) / 115; 230 Volt |
| Loudspeaker | - - No sound reproduction output. |
| Power out | |
| from Radiomuseum.org | Model: Vacuum Tube Voltmeter 400 HR - Hewlett-Packard, HP; Palo Alto |
| Material | Metal case |
| Shape | Rack |
| Dimensions (WHD) | 19 x 7 x 10.8 inch / 483 x 178 x 274 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. |
| Net weight (2.2 lb = 1 kg) | 9.5 kg / 20 lb 14.8 oz (20.925 lb) |
| Source of data | - - Data from my own collection |
| Mentioned in | -- Original-techn. papers. |
| Literature/Schematics (1) | HP Katalog 1969 |
Model page created by Sven Hoffmann. See "Data change" for further contributors.
All listed radios etc. from Hewlett-Packard, (HP); Palo Alto, CA
Here you find 356 models, 322 with images and 123 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
