ferrite rod
17 links
- OH7SV Windom baluns
- Windom baluns for kilowatt range made with two ferrite toroidal cores amidon ft-140-61 and another schema with two ferrite rods
[ Hits: 3831 | Votes: 11 | Rating: 7.64 ]
- QRP Balun: A DIY Project
- DIY project of a QRP Balun. Using a high permeability ferrite rod and an old B&W dipole center insulator, he constructs a choke type balun for QRP use. The balun aims to create as much inductance as possible at HF, offering a high impedance to common mode currents
[ Hits: 59 | Votes: 0 | Rating: 0 ]
- The Guanella 1:4 balun
- A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.
[ Hits: 3636 | Votes: 1 | Rating: 10 ]
- Patented RF choke test
- A reproduction test of a a binocular ferrite core and winds a total of 7 turns is a patented rf choke with an unusual winding, although this winding scheme reduces the inductance, it might result in a much larger bandwidth over which the choke has a sufficiently large impedance. The Author test this model by reproducing the choke.
[ Hits: 105 | Votes: 0 | Rating: 0 ]
- Ferrite Rod TX Antenna for 40m
- No exotic claims are made for this antenna. Author just tried a few WSPR experiments on 40 meters and was surprised with the results. What appears below may inspire you to try something equally off-the-wall, to see what happens.
[ Hits: 298 | Votes: 1 | Rating: 1 ]
- Active ferrite rod antenna
- An active antenna for HF done with a ferrite rod by OH7SV
[ Hits: 3867 | Votes: 3 | Rating: 8.67 ]
- Ferrite rod antennas
- Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.
[ Hits: 1056 | Votes: 1 | Rating: 2 ]
- Ferrite Rod Antenna
- Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.
[ Hits: 1387 | Votes: 4 | Rating: 7.5 ]
- The Ferrite Rod Antenna
- Theory of the ferrite rod antenna
[ Hits: 878 | Votes: 3 | Rating: 1 ]
- OH7SV Matti Hohtola Ham Projects
- The most modern QRP transceiver in 2004,Direct Conversion HF Transceiver with DDS LO,
50 ohm to 200 ohm HF wide band transformers,
Wilkinson splitter for RX measurements,
Windom baluns 2001/2004,
Ferrite rod antenna for 80 meter, Magnetic Loop Antenna for 80 m, Mascot Switched PSU 9320 modification to 8A peak current, 150W MOSFET linear amplifier for 80m, 80 m HF SSB/CW Transceiver
[ Hits: 20372 | Votes: 36 | Rating: 8.11 ]
- Pro Audio Engineering
- High-quality products for broadcast and amateur radio. Kx33 Low-RFI AC Power Supply for HF Transceivers, Elecraft Heatsinks, Fair-Rite Mix 31 Ferrites
[ Hits: 118 | Votes: 0 | Rating: 0 ]
- CWS Coil Winding Specialist
- Manufacturer of transformers, inductors coils and chokes. Custom winding, EMI / RFI Filters, Antenna Windings on ferrite rod, Antenna Winding on phenolic. Any antenna coil designs.
[ Hits: 591 | Votes: 1 | Rating: 1 ]
- Taiyo Yuden
- Ceramic capacitors, inductor ferrite products, high frequency dielectric components like chip antenna and filters.
[ Hits: 260 | Votes: 0 | Rating: 0 ]
- A low power 3.5MHz ARDF transmitter
- This low power transmitter is developed for ARDF exercising purposes but of course can be used as super QRP transmitter either. With 1 or 2 meter wire as antenna and a ARDF receiver with ferrite-rod antenna the range is about 100m but with better antennas and a 'real' receiver the range is probably much larger.
[ Hits: 2041 | Votes: 4 | Rating: 6.5 ]
- Fair-Rite Products Corp.
- Ferrite components for the electronics industry
[ Hits: 491 | Votes: 0 | Rating: 0 ]
- FT CALC 1.3 - Ferrite Toroidal Core HF Calculator
- This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included.
The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.
[ Hits: 283 | Votes: 1 | Rating: 2 ]
- Prevention and Suppression of RF Interference to Audio Systems
new
- In this study, the author builds upon Muncy's research, demonstrating that radio-frequency current on cable shields affects audio systems through the "pin 1 problem" and shield-current-induced noise (SCIN). An enhanced equivalent circuit for ferrite chokes is proposed, addressing dimensional resonance and inductor self-resonance. Field tests confirm that chokes reduce interference across 500 kHz to 1,000 MHz. Guidelines for diagnosing and mitigating EMI from various sources are provided for product development and field installations.
[ Hits: 42 | Votes: 0 | Rating: 0 ]
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