TF1101 RC Oscillators

The TF1101 is a valve operated Wien bridge oscillator that covers the frequency range 20 Hz to 200 kHz. Output levels up to 20 V rms can be obtained. It is built like a tank!

There are two in the collection. The early one on the left had the darker grey panel and engraved lettering. the later version (below,) featured the paler grey front panel and silk screened lettering.

Both instruments are in good working order.