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StormwiseŽ brand Air variable capacitors. These are brand new, made in U.S.A.
Capacitor for AM, SHORTWAVE, LONGWAVE.
Air variable capacitors have two sections of metal plates. One set of plates is connected to a rotatable shaft allowing the capacitance to be varied simply by turning a knob.
Changing the capacitance allows stations to be tuned in easily over a wide frequency range. A variable capacitor is used for the tuning element because it is more difficult (simply from a mechanical stand-point) to change the radio's antenna coil's inductance value.
This precision brand-new Air Variable Capacitor has a range of 15 pF to 384 pF.
This capacitor is useful for receiver and antenna tuning in the longwave, AM, and shortwave bands from
50 KHz to 5 MHz.
Most capacitors of this type go from 20 pF to 365 pF. Our unit will go up to 384 pF. This gives you a little extra room to center the band or tune just slightly lower.
Use this capacitor to tune your ferrite rod antenna. Peak up the signal to your longwave radio by many S-units with this low loss capacitor! Improve your reception with the sensitivity that only an Air Variable Capacitor can provide!
Air Variable Capacitors offer sharp, narrow-band tuning. Get an Air Variable Capacitor to get the highest "Q" factor in your antenna! Use this capacitor with your own air coil (shown at left) or a coil wound on our ferrite antenna rod for improved reception. Perfect for building crystal radios!
Use it as shown in photo at left to GREATLY boost AM or LONGWAVE reception! You can build this AM BOOSTER UNIT! Just wind 25 or more turns of hookup wire on a 6 inch square cardboard box and then connect the capacitor to the coil wires. The coil and capacitor combination will boost AM and LONGWAVE reception in a portable radio setting nearby! Approximate Size (inches): 1.38 inches wide by 1.31 inches deep by 1.19 high. Built-in frame ground lug for easy connection.
Manufacture year: 2007.
Great for tuning longwave, AM broadcast, Shortwave.
Useful for fine-tuning the VLF band up or down by several KHz.
We can supply mass quantity of pieces of this unit for your company's new radio product.
See the AM Radio we built using this unit!
Great for tuning low frequencies and longwave!
This capacitor has a grand total of 891 pF when all three 297 pF individual sections are bridged together. Get 594 pF when two of the sections are bridged. Use only 1 section for a 297 pF capacitor to tune the AM broadcast band!
Great for tuning AM radio, Shortwave, and Longwave. A versatile all-purpose variable capacitor!
You can build a multi-band radio receiver - just switch in the extra two sections to tune lower in frequency without changing your primary coil!
Welded frame lug for solid ground connection.
9.5 to 297 pF in 3 individual isolated sections, totaling 891 pF when all 3 are tied together!
A very sturdy capacitor with 0.017 inch plate spacing, which means that plates are less likely to short-out! 800 Vrms maximum.
Sturdy ball-bearing shaft offers high conductivity and is not "scratchy" sounding like polyfilm capacitors.
Manufacture year: 2007.
We can supply mass quantity of pieces of this unit for your company's new radio product.
Part # LFVC-891 is $ 40.00 each + $ 9.00 s/h.
2 UNITS IN STOCK as of 03-15-2008.
You can build a multi-band tuner using the 3 separate switchable sections of the LFVC-891 capacitor.
L1 is a coil wound on our VFR_12C ferrite rod. Try about 30 turns and one 297 pF section for the AM broadcast band. Experiment for best results to center the AM band.
Switch in the extra sections to tune in the portions of the longwave band.
L2 is 2 or 3 turns wound near the end of the ferrite rod. Adjust for best "Q" or signal strength. L2 connects to the radio's 50-ohm antenna input.
You can also just place the radio near the L1 coil for coupling to the radio's built-in antenna if desired.
The ANTENNA is a longwire antenna, about 10 to 75 feet long. ANTENNA is optional, the unit will pick up with the ferrite rod only.
The GROUND is a separate ground rod outdoors. Do NOT use power line or phone line ground point.
Sales to USA and Canada only.
Get the sharpest and cleanest signals that only an Air Dielectric Variable Capacitor can give you!
No batteries or outdoor longwire needed to boost signals!
Stormwise Part # AMVC384 is $ 18.00 + $ 8.00 s/h.
USA and CANADA only.
No Foreign Orders.
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