HP 652A Test Oscillator
10Hz to 10MHz Output: up to 3.16 volts into 50 or 600 Ohm. Quits at 7 MHz on the highest range. May need a little tuning up. We tested it and came up with the following results. The tuning was scratchy, but spray took care of that. The amplitude is unstable in the 20 ~ 40 Hz region and it quits oscillating at 7 MHz on the 10 MHz range. So it is basically OK but may need a little overhaul.