142
Item nr.
Measure DC voltage from 10uV to 1 kV.
| Production | The Netherlands, 1960. |
|---|---|
| Bands | 100uV to 1000V (full scale). |
| Tubes | You are not going to believe this, 15 tubes! E80F, 5x EF86, EAA91, EZ80, PCL82, 2x 85A2, 2x DM70, 2x Z8. |
| Semi- conductors | 4x OA202. |
| Cabinet | Steel. Size 36x24x22 cm. Weight 11 kg. |
| Power | AC 110-245V, 32W. |
| Documents | Service documentation. |
This measurement instrument is built in several units. The power supply has EZ80 rectifier and is regulated by a PCL82, controlled by two 85A2 neon voltage stabilizers in series. Some extra reference voltage is obtained through an EAA91. The input signal is amplified by a four stage amplifier (E80F + 3x EF86) and directed by a bridge of four OA202 diodes. To convert the input to AC (this is neccesary because the amplifier is AC coupled) a vibrator is used, driven by an oscillator (2x EF86). Positive or negative signal is indicated by DM70 tuning indicators, and at two places there is an overload protection by Z8 neon bulbs. You see that nothing was left to coincidence.
| Obtained | 9/1999 from Eindhoven. |
|---|---|
| Condition | 9. |
| Disposed | Sold 4/2001. |