SKU: 47250783838

Ten (10) NOS Beehive 3pF - 25pF Variable Trimmer Capacitors Tubular Piston Caps

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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

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. 

Rarely seen these days, these are no longer made, but at one time were used extensively in both domestic and commercial radio equipment. The 'beehive' nick-name derives from the concentric construction, reminiscent of old-style beehives. These would be useful for repairing vintage sets with authentic parts or for general radio construction for trimming filters and oscillators. 

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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SKU: 47250783838

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ed calvin
Birmingham, US
★★★★★ 5
This is a very useful field manual for those interested in detailed traking methodology.
Format: Paperback
I spent many years as interpreter and ranger for the Colorado State Park System, now called CPW—Colorado Parks and Wildlife. We were annually tasked with surveying a given species' presence, density, and range in the park system and surrounding areas. Detailed field manuals were critical to the accuracy of our work, and HOW I WISH I HAD THIS BOOK DURING THAT PART OF MY CAREER. There are few other books I've come across providing detailed, yet very accessible information on how trail sign reflects animal behavior across different conditions, landscapes, and seasons (both weather seasons and mating seasons). One particular aspect of this book I found significantly intriguing was the section on predation—how does a mountain lion take down a mule deer vs. how wolves bring one down. The locations on a prey animal where a certain predator is most likely to attack, showing illustrations, is a remarkable piece of work, and there authors are clearly masters of interpreting tracks and sign! If you want learn about how mammals behave in their native environment, adding this book to your field manual packet will greatly expand your horizons! Busy it, read it, and get outside! Thank you Mr. Elbroch and Mr. McFarland for adding to the wildlife canon!
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Reviewed in the United States on August 5, 2023
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naughtyzut
Birmingham, US
★★★★★ 5
Great book and very useful tool to have
Format: Paperback
I had the older edition and lived it, but someone at my last job *borrowed* it and I never saw it again. This edition sends even better than the last, and I have that one five stars. Great pictures and the number of species covered means it's good in at least all states I've worked in.
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Reviewed in the United States on November 16, 2025
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Nandita Banerjee
Lowell, US
★★★★★ 5
Simply unputdownable
Format: Kindle
B N William’s field guide is fascinating. The book uncovers the bizarre reality beneath the polished propaganda of the Second World War, exploring the wonderfully weird truths where the line between brilliant innovation and sheer insanity vanishes completely. Every unusual piece of information has been verified using official declassified archives. I loved the story of Wojtek, a Syrian brown bear, who became a beloved and legendary figure, known for his unique story as an enlisted soldier. Read many more such stories and episodes in this book. You will enjoy them thoroughly.
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Reviewed in the United States on November 25, 2025
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ssingh72
Cuba, US
★★★★★ 5
Excellent read
Format: Kindle
This book is a deep dive into the truths behind the war we think we know. The book talks absurd strategies, eccentric leaders, and bizarre battlefield moments that genuinely happened. Each fact is both shocking and fascinating. it's entertaining and wildly surprising read. It’s a perfect pick for history buffs, trivia lovers.
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Reviewed in the United States on November 24, 2025
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Oswaldo L Bracco
Dallas, US
★★★★★ 5
Wonderful reading
Format: Paperback
It is a pleasure to “listen” to MLK Jr, and his description of the Montgomery boycott, mostly after reading the newest biography King, a life. Both books are highly recommended.
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Reviewed in the United States on April 20, 2026

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