Questions tagged [antenna-tuner]
Questions relating to the setup and use of antenna tuners, the virtues and shortcomings of various types of tuners, etc.
76 questions
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Why Does Yaesu FT-891 Fail To Transmit On Certain Bands?
I have a new FT-891. Today, while becoming better acquainted with it, I noticed it was not transmitting on 30m. First there was an LDG Z100A and then an MFJ antenna tuner between the transceiver and ...
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Antenna tuning with a SDR
Was thinking about tuning my PCB trace / helical ISM bands antenna inside a device I am building by continuously emitting CW and looking at received dB level in GQRX or any other software; then swap ...
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What's the origin of "π-C" or "Drake modified pi" network for impedance matching / antenna tuner?
This is a history question.
This type of antenna tuner included the Drake MN-4, MN-4C, MN-7, MN-2000, MN-2700, Kenwood AT120, AT130, AT200, AT230, Yaesu FC-707, FC-757AT (Automated pi-C match), Tokyo ...
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How to use a Johnson Matchbox Antenna Tuner with my Elecraft K3S?
I am experimenting with various antenna designs & feedlines and want to use a Johnson Viking Kilowatt KW Matchbox Antenna Tuner (250-30-3) with my K3S transceiver. The Matchbox was designed to ...
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IC 7300 Antenna Tuner stops working
I've been using my IC 7300 for several years, and the internal antenna tuner has always worked well for any mismatch up to 3:1 - as described in the manual. After a recent return from a 2 wk vacation,...
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What kind of matching network this is?
These networks are found in commercially available yagis with folded dipole driven element. I wander what theoretical model is used to design them? Appearently two parallel transmission lines branch ...
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generic antenna tuner term: impedance matching vs real tuner
Generally, an antenna tuner is nothing more than an impedance matcher. Badly termed, as it does not tunes any antenna.
For loop antennas though this is not the case. The antenna tuner does not do any ...
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homebrew t match atu issues
my homemade tmatch atu is ok on 80+40m but seems too have too mutch inductance on the bands above 40m,it has a 50mm/20cm roller coaster,i have a 40m doublet+ 4-1 balun+ common mode choke fitted in the ...
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Low power indicated on tuner
Please forgive my extremely basic question, I am brand new on HF and have issues with my setup.
I have a Chameleon MPAS antenna in vertical configuration connected to an AT-100 ProII tuner with a 50 ...
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What is the difference between LC(CL) and CLC antenna tuning unit as power loss is concerned?
What is the difference between LC(CL) and CLC antenna tuning unit as power loss is concerned ?
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Using NanoVNA to tune antenna
I'm extremely new to this, so I'm mostly asking for tutorials and so on.
I have tried configuring the device according to one tutorial I found. When I hook up the cheap antennas that came with a ...
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Does a halfwave (or multiple) length of coax duplicate the load impedance of one end at the other end?
Ignoring the possibility of multiple radiators and phasing harness(es), consider the following example:
If I have a short inductor-loaded vertical antenna that I have not carefully matched to 50 ohm ...
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IC-7300 internal tuner failing when before tuning I have a 1.5:1 SWR?
I have an IC-7300 and have tried it with a couple of antennas. In each case the internal tuner works sometimes, and not others. That is not a surprise in itself, but sometimes when the untuned SWR is ...
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HF Vertical antenna with no radial and loading coil but only ATU for 80m to 10m in a boat
I am new to HF antenna designs. I want to build an antenna for my fishing boat. My question is - if I use an ATU (like the ATU-100) and a 10m aluminium pipe as an antenna and fix it with a mast, will ...
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Help designing a random wire antenna to work with my tuner
I recently picked up an Icom M802 marine HF radio that includes ham bands and an Icom AT-140 antenna tuner. I have a ham license, but have been away from HF for many years and have never used a random ...
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