"Das Dualoszilloskop OG 2-10 dient zur gleichzeitigen Untersuchung sowie Amplituden- und Zeitmessung von zwei unabhängigen Vorgängen im Frequenzbereich von 0...30 MHz. Die Signale können sowohl periodisch, statistisch oder einzeln auftreten. Die Meßspannungen werden durch einen elektronischen Schalter abgetastet und auf einer Einstrahl-Oszillografenröhre zur Anzeige gebracht. Diese Schaltung bietet den Vorteil, daß bei Vergleichsspannungsmessungen zweier Meßspannungen keine zusätzlichen Meßfehler durch die unterschiedliche Lage der Meßplattenpaare einer Zweistrahloszillografenröhre auftreten.

Die konstruktive Gestaltung des Gerätes gestattet durch spezielle auswechselbare Einschübe die Anpassung an eine Vielzahl von Meßproblemen. So können beispielsweise die Zusatzeinschübe Markengenerator MS-90, Rechteckwellengenerator RS-90, Differenzverstärker DV-90 oder Verzögerungsgenerator DT-90 Anwendung finden" (RFT, Bedienungsanleitung OG 2-10, 1969)

BRIEF SPECS

In 2000 one of the visitors of this museum asked me if I am interested in a old RFT oscilloscope. He lived near Berlin and due to the space it occupied he wanted to give it away. To be true I didn't know anything at all about instruments which were manufactured in East Germany. But when he said that I would need to pick it up because of 50 kg weight my interest was born. One of my former collegues of the sales staff at Motec arranged the pickup during a sales trip through the east of Germany. What he brought along was a full-sized oscilloscope with separate power supply, interconnection cable, manual and two new-in-the-box spare crt's. This 'installation' contains the astonishing count of 108 vacuum tubes. The scope is very friendly towards maintenance as all circuitry is divided in separate chassis. After removal of all chassis only the framework with the crt is been left.

Until now the scope wasn't connected to the mains. As it is extremly dirty (because the air intake lacks a filter element) it still waits for washing. After studying the manual I decided to look around for some spare power triodes 'EC360', as they were used in the power supply and are relativeley uncommon. They would make up a good choice for an audio power amp - imagine 200 mA current at only 50 V plate voltage! The cathode follower probe contains a ECC88 twin-triode connected both halves in parallel. Heater and B+ voltage is supplied from the preamplifier BV-90.

While working on the scope I will add some information at the detail page, so you can follow-up my restauration up's and down's. The project is now in it's sixth year but I am confident to finish the scope one far day...