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Description
Two (2) NOS Beehive 2pF - 10pF variable trimmer capacitors - tubular piston capsBrand: Philips Mounting Style: Chassis Mount Type: Trimmer Capacitor Capacitor Construction: Variable Tubular Capacitor Capacitance Rating: 10pF Two (2 pcs) NOS professional variable capacitors 2pf 10pf. Rare Beehive Tubular Piston Caps! Made back in 60s probably by Philips. They are marked "804 20012 10pF" and are very solidly constructed, with silver plated connections and a ceramic core. Fully meshed the capacitance is ~15pF, falling to < 2pF when
Brand: Philips
Mounting Style: Chassis Mount
Type: Trimmer Capacitor
Capacitor Construction: Variable Tubular Capacitor
Capacitance Rating: 10pF
They are called "beehive" variable capacitor and you can find them also as "tubular" or "piston" variable capacitors. Despite they are of low total capacitance (like all trimmers), they are small in size compared to their big brothers, they have high-Q, they can handle quite a lot of power and voltage (500V), and due to their construction, they are finely-tuned, since they all have an embedded mechanical reduction drive (their screw)! I have found these trimmers to be backlash-free as well, which means that as you tune back and forth you do not skip frequencies due to backlash. Whereas in a standard trimmer the usable rotation is half turn at maximum, these trimmers have several turns to achieve the same capacitance variation. Moreover, these trimmers allow a knob to be easily mounted onto them.
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