variable capacitor
16 links
Antennas : End-Fed : End Fed Half Wave Antenna
- 40m portable antenna tuner
- A small-sized portable antenna tuner for the 40 meter band end-fed half wave antenna based on a toroid core and a variable capacitor by VK5ZVS
[ Hits: 2154 | Votes: 6 | Rating: 7.83 ]
- Cheap antenna to make from 160m - 6m
pop
- The antenna is nothing more than a simple 2.4 metre square loop drawing pinned to the internal brick wall of the spare bedroom. Yep, thats right, the inside wall of the spare bedroom - ideal for flat dwellers, hotel rooms or whinging neighbours, The loop has a simple switched inductance at the top of the square loop and uses a simple coaxial stub to tune the antenna. An additional variable capacitor placed across the feedpoint can be used to fine tune the resonance of the antenna, by Andy G0FTD
[ Hits: 46500 | Votes: 28 | Rating: 7.61 ]
- Soft copper Tube Loops
- Air conditioning soft copper tubes are perfect for loop construction. If you want to try a loop you must have an air variable capacitor or a vacuum variable capacitor. Article by PY1AHD
[ Hits: 822 | Votes: 0 | Rating: 0 ]
- Magnetic Loop QRO
- Magnetic Loop with high-voltage variable capacitor and variable entry point by OE1VFW
[ Hits: 728 | Votes: 3 | Rating: 1 ]
- Coca Cola Loop Antenna
- The Coke Loop is a Small Magnetic Loop Antenna tuned by a trombone-style variable capacitor made with standard soda cans
[ Hits: 2644 | Votes: 9 | Rating: 6.33 ]
- Ham Radio Loop Antenna
- Amateur radio loop antenna project using a Comet CVBA-500BC vacuum variable capacitor.
[ Hits: 254 | Votes: 0 | Rating: 0 ]
- Magnetic Loop HF antenna
- An homebrew HF Magnetic loop made with 2m length of 6mm diameter copper pipe formed into a near circle as the low loss inductor, a short length of coax as a capacitor,a short length of mains cable, again as a fixed tuned capacitor, a tunable 365pF air spaced capacitor, and a small Jackson C804 airspaced variable with a small 3-35pF trimmer in parallel
[ Hits: 130 | Votes: 0 | Rating: 0 ]
- Z Match with Toroid
- A single coil Z-Match. This QRP version by G3WQW, using a T130-2 toroidal inductor and polyvaricon variable capacitors was published in Sprat 84.
[ Hits: 98 | Votes: 0 | Rating: 0 ]
- Oren Elliott Products - Variable capacitors
- The largest domestic manufacturer ofair-dielectric variable capacitors located in edgerton, ohio.
[ Hits: 789 | Votes: 0 | Rating: 0 ]
- HA8DU Antenna Tuners
- HA8DU European manufacturer of quality amateur radio antenna tuners for HF Bands, from 10 meter to 160 meters band. Products includes manual and automatic antenna tuners, power handling till 3.5 KW. HA8DU produce even custom made variable capacitors and rotary switches.
[ Hits: 396 | Votes: 4 | Rating: 7.5 ]
- Omnicor - Vacuum Capacitors
- Omnicor supplies Meivac vacuum fixed and variable vacuum capacitors for RF transmitters.
[ Hits: 532 | Votes: 1 | Rating: 10 ]
- Icom 706MK2G Repair
new
- After years of reliable performance, a 26-year-old Icom 706MK2G exhibited an unusual deviation during FM transmission, with the actual frequency being 10kHz off from the displayed frequency. Additionally, the power meter showed a sharp dip during transmission. Upon investigation, it was discovered that the FM VCO voltage adjust variable had become dirty and sluggish over time. By adjusting the variable capacitor and cleaning it with switch cleaner, the issue was resolved, restoring stable power output and accurate frequency transmission.
[ Hits: 15 | Votes: 0 | Rating: 0 ]
- Otto Schubert GmbH
- Electronic components distributor based in Gemany offer a variety of variable capacitors and other hard-to-find components.
[ Hits: 336 | Votes: 0 | Rating: 0 ]
- Hamtech
- HAM-made engineering products supplies and produces coaxial relays, antenna switches, sequencers, roller inductors, variable capacitors, low noise preamplifiers, RF power rotary switches and coil bodies.
[ Hits: 191 | Votes: 0 | Rating: 0 ]
- A home-built low-pass filter for 4m
- This unit uses four capacitors, only two of which are variables, and a single tapped coil. It is built in a die-cast box, and has been tested up to 80W input power on 70MHz by G4CJZ
[ Hits: 588 | Votes: 0 | Rating: 0 ]
- Home Made 5KV Capacitor
- Building a high voltage (5KV), variable plate capacitor (17 to 220pF)
[ Hits: 1354 | Votes: 7 | Rating: 7.28 ]
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