- Abington, Pennsylvania, United States
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US $24.99
- Jan 29th
This is a B&K Model 1827 frequency counter (see the attached original 1977 advertisement for the manufacturer's specs). The counter runs on 6 AA batteries, but a single 9 volt battery & battery clip has been installed instead. It's in very good physical condition, with light wear, and it checked out properly with the output from an audio signal generator.