"The Model 410C is an extremely versatile general-purpose instrument for use anywhere electrical measurements are made. These measurements are made with laboratory precision previously not available in a single instrument. The versatile easy-to-use HP 410C will be a valuable tool in any laboratory, production line, or service department" (hp, Catalog, 1968)
BRIEF SPECS
| Range | 15mV to 1500V |
| AC Response | 20Hz to 700MHz |
| Output | 1V f.s. |
| Power | 13 watts |
| Dimensions | 6-1/2" x 5-1/8" x 11" |
| Weight | 8 lbs (4 kg) |
| Technology | tube, transistor |
| Price (for 1968) | $ 425 w/ AC probe |
The 410C replaced the 410B and was eventually the last VTVM ever produced by hp. Here you see one with the optional AC probe. The probe has a vacuum diode inside it's body - it will warm-up you hand. The amplifier is feedback stabilized, so the pointer shows absolutely no swing when applying a signal. Mine instrument was built in 1975 and was stored in it's sealed container by the german army until I bought it in 1997.
