circuit
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Antennas : Feed Lines- Single Coil Z Match
- Single Coil Z Match, circuit Diagram and homebrewing notes
[ Hits: 1320 | Votes: 6 | Rating: 8.33 ]
- Remote Control Antenna Switch
- The Remote Control Antenna Switch consists of two circuit boards. The control unit and the remotely controlled switch
[ Hits: 1150 | Votes: 0 | Rating: 0 ]
- Getting the most from your tuner
- Here is how to adjust this popular tuner circuit so it transfers maximum power to your antenna without going snap
[ Hits: 2825 | Votes: 3 | Rating: 6.33 ]
- A remote antenna tuner
- Interesting project to remotely control, using a servo control circuit, a common commercial antenna tuner by N30X
[ Hits: 11745 | Votes: 6 | Rating: 7.33 ]
- Fun With Tubes
- A noncommercial site operated by Max Robinson and
dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques.
[ Hits: 732 | Votes: 5 | Rating: 9.8 ]
- Antique Radio Schematics and Capacitors for Tube Radios
- Specializes in antique radio schematics and capacitors. carries antique radio schematic diagrams and electronic circuit service information for american, canadian and european antique radios.
[ Hits: 2253 | Votes: 8 | Rating: 6.87 ]
- Canadian Antique Radios Schematics Diagrams Service
- We specialize in canadian antique radio schematics for vintage tube radios made in canada. we carry lots of factory electronic circuit schematic diagrams as well as all rcc / radio college of canada service data 1920's - 70's.
[ Hits: 1612 | Votes: 4 | Rating: 6.25 ]
- E. H. Armstrong
- Radio's premier inventor, Edwin H. Armstrong was responsible for the Regenerative Circuit (1912), the Superheterodyne Circuit (1918), the Superregenerative Circuit (1922) and the complete FM System (1933).
[ Hits: 355 | Votes: 2 | Rating: 10 ]
- Eliminate QRM from 6 meters band
- The circuit described below will substantially reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequencey by TREVOR, G3ZYY
[ Hits: 1567 | Votes: 1 | Rating: 10 ]
- Circuit Improvements for the TL-922
- by Richard L. Measures, AG6K
[ Hits: 2000 | Votes: 2 | Rating: 10 ]
- Negative feedback output circuit
- Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.
[ Hits: 1105 | Votes: 1 | Rating: 10 ]
- DL5DBM 1KW amplifier for 144 Mhz
- Pictures and circuit diagramm to build this power amplifier for 2 meters
[ Hits: 3389 | Votes: 2 | Rating: 10 ]
- Morse Code Beacon Keyer
- This circuit stores a single morse code message as bits in an EPROM chip, the message is sent to a relay which can key a CW transmitter.
[ Hits: 1117 | Votes: 0 | Rating: 0 ]
- Improvements for TS-830S
- Circuit Improvements and Maintenance Procedures for the TS-830S
[ Hits: 1278 | Votes: 4 | Rating: 8.75 ]
- Circuit Improvements for the TS-430S
- by Richard L. Measures, AG6K
[ Hits: 925 | Votes: 2 | Rating: 6 ]
- Homebrew FT 817 Headset
- A simple circuit to homebrew your own headset for the Yaesu FT-817
[ Hits: 3452 | Votes: 2 | Rating: 6 ]
- A Power Supply on the Cheap
- Need a variable power supply that is short circuit protected and over voltage protected; Here is a good one that can be built cheap by VE3IVJ
[ Hits: 2586 | Votes: 0 | Rating: 0 ]
- External Keypad for FT-817
- An external keypad for FT-817(ND), for the serious portable/field-day contester/operator. Homebrew it with the free firmware and public circuit diagram.
The circuit is very simple and takes power supply from the ACC port of the radio
[ Hits: 2593 | Votes: 2 | Rating: 5.5 ]
- ARDF transmitter for 80 meters
- The 80m TX described here is the well known ON7YD ATX-80 and timer, combined and re-engineered to fit a readily available enclosure by G3ZOI
[ Hits: 1098 | Votes: 1 | Rating: 9 ]
- 50MHz-Transverter 10m/6m from DK7ZB
- This transverter was built in 1994, a discription in three parts (german language) for DOWNLOAD as PDF-files. Circuit, printed-boards and layouts in the files
[ Hits: 7538 | Votes: 13 | Rating: 8.52 ]
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