| Brand | Frequency Devices |
|---|---|
| Country/Region of Manufacture | United States |
| Unit Quantity | 1 |
Check the listing for details. Clean Frequency Devices 901F Filter Amplifier Instrument Powers Up Sold UNTESTED. Condition: Used. Listed at 125.00 USD. In addition to being a watch collector I am also a retired Sales Engineer and was able to buy this very clean Frequency Devices Model 901F bench top Filter Amplifier.It powers up fine but is untested.