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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.
The kit can be through the T network resonant antenna, to make the radio work normally. Change SWR, corrections due to external reasons not tuned antenna. Can be used as a bandpass filter, Reduce the harmonic in the transmitter, to reduce out of band cross modulation and interference when receiving.
BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER (It really isn't all that difficult.) This page details several T-match tuners. By comparing them, you should be able to construct a tuner to your own particular requirements.
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
Using some old components left over from prior projects, Jim W6LG builds a manual antenna.The Patreon Link: patreon.com/JimW6LG
It’s an ATU, antenna tuning unit, aka coupler, matchbox, or whatever your preferred term is for an impedance matching unit. It was given to me by Graham, VK2DIG, on the condition that I work out how it works. This article describes my findings. First impressions… it’s homebrew, made evident by hand written labels on the front panel, but well
Get maximum power to your antenna by learning how to hook up and use a tunner to properly "trick" your rig. A remote antenna tuner. Interesting project to remotely control, using a servo control circuit, a common commercial antenna tuner by N30X. W8ZR High-Power Antenna Tuner.
