SKU: 84543719798

Two (2) NOS Beehive 2pF - 10pF variable trimmer capacitors - tubular piston caps

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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

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 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.

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SKU: 84543719798

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Amazon Customer
Birmingham, US
★★★★★ 5
It Works!!!!!
Size: Powder Poli Ox - Pack of 6
We have only completed the first two steps it Poly Glo set we purchased and has it ever made a difference in the look of our hauler/trailer! The dull oxidize black color is somewhat shiny. Cant wait to put the final two steps on it! A little elbow grease and work did wonders! We will share a photo once the procedure is complete!
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Reviewed in the United States on May 19, 2026
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Amazon Customer
Massapequa, US
★★★★★ 4
Could be good
Size: Powder Poli Ox - Pack of 6
I cleaned my RV very thorough from top to bottom before even starting the process with the Poli Glow system. Here's what I learned despite videos and lots of reading reviews. 1. Must be very clean and clear of anything you dont want to stick and show on your final outcome. 2. It takes more coats than you think it would (after 3 coats) it was still really streaky and I was starting to regret using Poli Glow. I ended around 7-8 coats and my rig had no major oxidation at all. 3. As one reviewer said, use a clean microfiber cloth v the applicator that comes with it, I found much better results with no lines. 4. Dont go to heavy on the coating, the instructions say this, but I went super light and it can be very easy to get lines with heavier application. 5. Dont look at your work after 3 coats, you will feel deflated, just keep going for at least 6 coats and then look at your work. 6. Only do small areas and look out for drips and lines, you need to get them out right away. 7. I did not use the Poli Ox, I was able to get any oxidation out with just the Poli Prep 8. Going up and down a ladder for hours sucks! 9. I hope it will come off in the next couple of years when I plan to replace the decals. Honestly, thats my biggest fear is how hard it will be to remove when the time comes. 10. After a scary start, I will say it did turn out pretty nice, was it easy, nope, would I do it again? Not sure, I need some time for my back to heal up! If you do choose Poli Glow know there are other options that maybe a better way to go such as wet sanding etc. Poli Glow is pretty good, but it can be pretty bad also if the surface is not cleaned and the Poli Glow applied correctly.
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Reviewed in the United States on August 17, 2023
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Derek Baloun
Chelsea, US
★★★★★ 5
Poli glow works!
Size: Powder Poli Ox - Pack of 6, Size: Powder Poli Ox - Pack of 6
Works amazing! After many attempts to buff I purchased Poli glow and done in less than half the time and beautiful result.
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Reviewed in the United States on April 19, 2026
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Amazon Customer
Omaha, US
★★★★★ 5
Wonderful product
Size: Powder Poli Ox - Pack of 6
This product has exceeded our expectations. Thank you
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Reviewed in the United States on May 20, 2026
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LeGris
Charlottesville, US
★★★★★ 3
Good but DO NOT USE APPLICATOR MITT
Size: Powder Poli Ox - Pack of 6, Size: Powder Poli Ox - Pack of 6
The poli-ox worked well, just know that it will require several applications to remove old buildup and oxidation. once you are done, the paint will still look oxidized, but once you put the sealer on, the color will be deep and shiny. The sealer itself is supposed to be enough for a much bigger RV than we used it for. (17') We used 3/4 of a bottle for 1 side, due to the fact that we would remove and start over because it left ridges like a brush in paint. On the second side of the RV, we scrapped using the Mitt, and low and behold, using a microfiber towel to apply solved all of the issues. No more ridges and the remaining 1/4 of the bottle was enough to apply 5 coats. The mitt also wastes a LOT of product. So be warned use a Microfiber towel (that has been previously washed) and it will save you a LOT of time, money and angst.
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Reviewed in the United States on March 12, 2023

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