🙂 Hello everyone... I have a question. Does anyone have a schematic for a simple antenna tuner at least for tuning 2 or 3 KV bands? Thank you... 73
transmatch
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@om4ajk wrote:
🙂 Hello everyone... I have a question. Does anyone have a schematic for a simple antenna tuner at least for tuning 2 or 3 KV bands? Thank you... 73
No schematic would be, but with what power you will go through it and then to what antenna you want to adapt... automatically or manually...
ParticipantReplyI agree with Martin, there would be a schematic (and not just one). The classics are pi- and T-sections.
It's worse with components - variable capacitors and ceramic switches, or rollers.
If there is even a small chance to solve the antenna without a tuner, it is definitely worth considering.
ParticipantReplyIt is so, but I have a problem with the fact that the caretaker does not allow me to do it and it is equipped... And the neighbors do not allow me either... Solution: Since I live on the ground floor, I will throw it on the trees and that's it... 73 de OM4AJK
ParticipantReplyIf I understand correctly, will it be an LW fed at the end?
ParticipantParticipantReplyBands? Power at the end? Middle? Coaxial? Ladder? Radials? Height? Mounting points?
ParticipantReply@Anonymous wrote:
Antenna about 15, 20m long through transmatsch.. I need the diagram.
The simplest that works and controls are Pi articles. But it surprises me that you need a diagram for that when you have a license = you should have some knowledge.
here is one of the diagrams for L article I have one like that and it has adapted to anything so far.
others are for example here, here …… Uncle Google is a good helper.
in case you don't have space, how about considering a rockloop or another similarly designed antenna?
ParticipantParticipantReplyIf I were German, I would scream Hilfe!
Juro, in the technical field, like amateur radio, nothing is one size fits all. I asked eight questions and I have an answer to one and a half.
Based on spatial possibilities, it is possible to try to simulate multiple antennas in the program and estimate their properties – impedance and radiation ratios.
Preliminarily, I would see hope in a vertical radiator 2x 7m fed in the middle with a ladder http://www.mydarc.de/DK7ZB/Vertikal/vertical_antennas.htm as the best antenna for eight HF bands.
LW with a length of 15 to 20m stretched horizontally will likely have very poor impedance ratios on 80m and tuning it will only be possible at the cost of enormous losses. It might be better on higher bands, but who knows.
A good antenna could be an L-antenna, which can be realized for multiple bands even without a tuner. However, it requires certain spatial conditions.
ParticipantReply@OM0AAO wrote:
If I were German, I would scream Hilfe!
Juro, in the technical field, like amateur radio, nothing is trivial. I asked eight questions and have answers to one and a half.
Well, I think judging by the answer we should all start to be afraid.. I don't want to offend the anonymous person, but it looks like someone who wants to show the whole world something without any effort 🙁
So I wouldn't worry too much about the effectiveness of the antenna.Personally, with this approach, I wouldn't build anything (you can't just get capacitors for 100W somewhere. And the voltages that will appear there with LW/random will be even more interesting).
To anonymous: Don't build anything without knowledge. With your approach, I would recommend going the route of buying a tuner, they start at around 100 Euros.
Or buy some 'antennas that work without a tuner' e.g. OUT-250B D, Diamond BB7V, DIAMOND CP – 6 (these are verticals 4.5m and more) or BB6W which is a 'strange' LW for small spaces. For these antennas, manufacturers guarantee use without a tuner in the specified bands.The result will be that you won't kill yourself over a homemade tuner and the efficiency will be adequate to the effort spent. And the overall costs will be approximately the same (when I consider the time spent looking for parts and assembling the tuner).
ParticipantReplyTo anonymous … try reading this: http://ok2buh.nagano.cz/first/Antenni%20tunery.html
you will learn a lot and also have schematics .. 73!
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