Need precision tuning in RF circuits or oscillator designs? The uxcell 224pF Trimmer Capacitor (model PVC-224) is a compact, adjustable capacitor built for fine calibration. This 3-piece set features linear adjustment and PCB-mount design—ideal for radio frequency tuning, filters, and prototyping work. With durable plastic and metal construction, it's perfect for engineers who demand repeatable, stable results.
| ▌ PRODUCT | ▌ QUALITATIVE INFO |
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> Model: uxcell PVC-224 > Capacitance: 224pF (4-turn linear) > Mount: PCB, 12.5mm pin pitch > Size: 17×17×8mm | Weight: 6g > Material: Plastic + Metal > Qty: 3pcs | RoHS Compliant > Use: RF tuning, oscillators, filters |
Technical Insight & Real-World Use:
I’ve used this set of uxcell trimmer capacitors while fine-tuning a crystal oscillator bank for a ham radio project. The four-turn linear adjustment gives just enough precision for dialing in resonance peaks without the jumpiness of cheaper single-turn models.
They fit snugly into standard 0.1-inch pitch prototype boards, and I was pleasantly surprised at the build quality. The gold-plated contacts and firm mechanical resistance make each adjustment feel controlled—no wobble, no sudden jumps in capacitance. That’s especially important when you’re dealing with frequency-sensitive RF sections or tank circuits.
One thing worth noting: these aren’t your casual hobby capacitors. If you’ve ever struggled to stabilize a tuned LC filter or get reliable frequency alignment in DIY receivers, you’ll appreciate the tactile feedback and stability of these caps. I once used one to stabilize a PLL loop that kept drifting with temperature—worked better than expected.
FAQ from Real Use Cases:
Q: Can I use this in a high-frequency RF circuit?
A: Yes. They’re stable enough for VHF/UHF adjustments under 250MHz in many hobbyist-grade builds.
Q: How precise is the tuning?
A: Four linear turns offer finer adjustment than typical single-turn trimmers, great for tight frequency targets.
Q: Is it reusable across builds?
A: Yes. The metal contacts hold up well to desoldering and reinsertion, assuming you don’t overheat them.
Q: Can this replace a fixed 220pF capacitor?
A: Only if your design tolerates small variance and you want tunability—otherwise, use it in parallel or as a trimmer.
Q: Does it affect circuit behavior when rotated?
A: Slightly, yes—but it’s meant for active tuning. Once set, values hold steady unless disturbed physically.
Hidden Detail That Matters:
Unlike cheaper trimmers, the internal construction here doesn’t deform under moderate thermal cycles. I checked stability after 5 hours of continuous operation near a hot power transistor—no drift.
Final Thought:
I keep a few of these in my RF toolkit—not just for emergencies, but because sometimes you need that extra 2% of tuning finesse. And these little caps deliver exactly that.
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Beneath its standard design lies potential for something far beyond its original purpose. A kindred solution, crafted from the same hidden logic — preserved as a sealed work of mind. |
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