Search results
A. schematic diagram. Make before, please check carefully the picture. 1, circuit diagram as follows: B. the production process. before making, please prepare a soldering iron, soldering tin wire, scissors, knife, multimeter and other tools. According to the original check original table.
The QRP Manual Tuner appears to be the combination a few pieces of work, some that are possible to locate on the Internet. SWR Indicator Circuit - Dan Tayloe N7VE LED SWR indicator
I decided to build a homebrew antenna tuner because I needed a passive pre-selector network to match an experimental end-fed wire antenna to my QS1R SDR receiver. Please Note: In the last version of my modified FRI-Match (diagram above), I replaced the 470 pf variable capacitors with 500 pf.
Basic multi-z antenna tuner for QRP. Easy to tune low-z and high-z antennas. This is just an experiment while testing it with my 40m EFHW antenna.
17 lut 2020 · LED SWR Schematic. Tuner is using a high-pass T-network to match low input impedance (Z) to a high output Z. Detailed explanation of how T-network operates and the best practices of using such tuners covered in QST Jan 1995, Getting the Most Out of Your T-Network Antenna Tuner.
18 kwi 2020 · Z-Match Tuner Schematic. The coil was wound using some #22 solid hookup wire (from Radio Shack) which I had laying around. The secondary winding is wound between the turns of the primary to ensure tight coupling.
Antenna tuners (or transmatches) are great projects for the budding homebrewer. They're fairly easy to build from scratch, usually very forgiving with respect to component values, and very useful to have around the shack.
