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The concept of air coaxial giga trimmer is not new, even Philips in the 60's built very good variable coaxial capacitors used in the first hybrid RX/TX mobile stations (transistors and vacuum tubes in the TX final stage) for professional version and consumer version for TV tuners.
Gigatrimmers are used in RF in particulary critical situations, for example in crystal high stability oscillators tuning, on filters or high Q resonant circuits or even for quite high powers, the main features are: --
GIGATRIMMER TYPE CVG-N1 | AIR GIGATRIMMER | |
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![]() A = STATOR B = PORCELAIN BODY C = ROTOR |
APPLICATIONS |
MOBILE PART(ROTOR) by rotating the rotor it enters in the stator changing the capacity, the concentric circles are needed to reach the desired capacity |
MECHANICAL PRECISION |
Classification of gigatrimmer depending on the type of mounting | |||
Universal mounting |
Air or PCB mounting |
Chassis (or panel) mounting |
PCB Mounting |
They have leads for pcb or air mount but also the nut for chassis mount | They have leads for pcb or air mount | They have no leads so they can be mounted only on chassis or panel | CVG-W… types SMD mount |
example: ![]() |
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pcb mount holes (in this example 3 leads) | ![]() |
protection cap (if provided) | ![]() |
leads | chassis mount nut (if provided) |
Order code: | CVG-A1 |
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0.3 - 3.5 pF porcelain gigatrimmer, panel mount with nut, 250V, Q > 5000 @ 200 MHz, Ø 3.5 mm Tronser |
Order code: | CVG-A2 |
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0.35 - 3.5 pF porcelain gigatrimmer, pcb or air mount with two pins, 250V, Q > 10000 @ 100 MHz Temex AT5801 |
Order code: | CVG-B1 |
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0.6 - 3.5 pF porcelain gigatrimmer, pcb or air mount with two pins, Q > 10000 @ 100 MHz, Ø 3.5 mm, equal to Temex AT 8051 Johanson 8051 |
Order code: | CVG-B2 |
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0.5 - 5 pF porcelain gigatrimmer, pcb or air mount with two pins, Q > 7500 @ 100 MHz, Ø 3.5 mm, provided with protection cap Microelectronics Ltd. MAV01E05 |
Order code: | CVG-B3 |
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0.5 - 8 pF porcelain gigatrimmer, pcb or air mount with two pins, 125V, Q > 3000 @ 100 MHz, Ø 3.5 mm, special version with the upper part not threaded Voltronics A1F8 |
Order code: | CVG-J |
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0.5 - 6 pF porcelain gigatrimmer, PCB or air mount, Q > 10000 @ 100 MHz, 250V, NP0 ultra stable 0 ±15ppm/°C, Ø 5 mm, supplied with protection cap, equal to Temex 5701 Airtronic 5701 |
Order code: | CVG-N1 |
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1.3 - 16 pF porcelain gigatrimmer, vertical mounting, 250V, NP0, three pins Johanson 5476 |
Order code: | CVG-P6 |
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1.1 - 14 pF porcelain gigatrimmer, PCB or air mount with two pins, Q > 5000 @ 100 MHz, 300V, Ø 6 mm, supplied with protection cap Tronser 60-0730-15014-000 |
Order code: | CVG-P7 |
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1.5 - 14 pF porcelain gigatrimmer, PCB or air mount with two pins, Q > 3000 @ 100 MHz, Ø 6 mm, supplied with protection cap, equal to Temex AT8053 Johanson 8053 |
Order code: | CVG-Q1 |
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1.2 - 12 pF gigatrimmer, PCB or air mount with two pins, 250V, NP0, Ø 8 mm, height only 9 mm, the tuning screw never exceed the body height |
Order code: | CVG-Q4 |
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0.6 - 9 pF gigatrimmer with quartz body, PCB or air mount with four pins, 750V, NP0 ±50ppm/°C, Ø 7.5 mm AFM Microelectronics Inc MPT51101A |
Order code: | CVG-Q5 |
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0.8 - 10 pF gigatrimmer with quartz body, panel mount, 250V, NP0, hole Ø 5 mm, body Ø 8 mm, supplied with nut and washer |
Order code: | CVG-R |
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2.5 - 12 pF dual differential gigatrimmer with quartz body, air or PCB mount with four pins, Ø 7 mm |
Order code: | CVG-V2 |
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2 - 10 pF teflon tin-trim series gigatrimmer, air or PCB mount with two pins, ultra flat and ultra miniature, Q > 1000 @ 100 MHz, 250V, Ø 3.2 mm Temex |
Order code: | CVG-V3 |
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3 - 25 pF teflon tin-trim series gigatrimmer, air or PCB mount with two pins, ultra flat and ultra miniature, Q > 1000 @ 100 MHz, 250V, Ø 5 mm Temex |