via this auction"Vintage oscillator, very solid, from the late 60s - transistor not tube.
These work from batteries or an external power supply. 12V needed.
Interesting Frequency ranges:
- 300Hz - 3kHz,
- 3kHz - 30kHz and
- 30kHz - 300kHz.
Very solid click-stop switches for exact dB send levels from 0 to -49dB, and output impedance - 75, 125, 140 and 600 Ohm.
Smooth geared variable frequency knob (1:4)
Battery compartments may have some corrosion, but the compartments are totally separate from the component/control compartments.
Originally would have had lids, not included.
Copy of Manual included"
