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Description
Ten (10) NOS Beehive 3pF - 25pF Variable Trimmer Capacitors Tubular Piston CapsBrand: Philips Type: Trimmer Capacitor Tolerance Rating: 10 % Capacitor Construction: Variable Tubular Capacitor Capacitance Rating: 25pF Ten (10 pcs) NOS professional variable capacitors 3pf 25pf. Rare Beehive Tubular Piston Caps! Made back in 60s probably by Philips. They are marked "804 20014 25pF" and are very solidly constructed, with silver plated connections and a ceramic core. Fully meshed the capacitance is ~30pF, falling to < 3pF when open.
Brand: Philips
Type: Trimmer Capacitor
Tolerance Rating: ±10 %
Capacitor Construction: Variable Tubular Capacitor
Capacitance Rating: 25pF
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.
I collect tubes and tube gear for more then 35 years and I start to sell recently, please be sure to check my other items and visit my store for more rare NOS tubes and parts.
I have more than 250000 NOS tubes in stock and just small part is listed here, if you are interested in any specific tube or part, please send me message.
If you buy any item on eBay from me and for if you are not fully satisfied for any reason or have any complains, please send me message before leaving negative or neutral feedback or opening a case. I really do care about your satisfaction and I’ll do my best to solve any kind of problem.
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