Nice job. If I was going to build a Tee, I would definitely provide a couple of vacuum relays in the circuit to short out either capacitor when tuning coaxial fed antennas. That would give you a low pass and high pass L to go with the T. The L is more efficient and unbalanced like coax. Most of the time when you are tuning a coax antenna you don't need much in values. Just a thought. 73
Nicely finished project Peter. I have a couple of old capacitors and an inductor in my shed which I pulled out last week and was thinking how I might put a tuner together. I need to put them on the LC meter, but they look similar in dimension to yours so I expect will be suitable. Need to look for a meter dial for the inductor. 73 for now. Phil VK8VWA
Hey Phil, thanks for the comment. I gathered the main components over the years and then finally decided to build. Probably had the roller inductor for well over 15 years, so don't wait that long, get into it and enjoy the project. A good t-match tuner will be used all the time and last a lifetime. I think the counter came from Nebraska Surplus and the planetary reduction drives I think are Jackson Bros. Do you still have access to AllStar? Cheers Peter vk6ysf
Hi Peter, Rajesh VU3RHU from Mumbai. May I request you to share the construction details of the roller inductor, especially the roller part. Not able understand. Thanks
I think the T match is easier to construct as one end of the roller inductor is grounded and only need one roller inductor which are harder to come by these days. The Pi is possibly superior as is arranged a low pass filter and would there reduce harmonic radiation, however most modern equipment do not produce much in the way of harmonics, so not a major advantage.
Peter, Good video on ATU's, I've looked through the links you have shown and I can't seem to find the black wires you use on the inside of the tuner. This is the lines of black wires are they 50 OHMS? in side the box. Would RG 400 coaxial work better with this tuner? de Dennis vk4oc in sunny QLD.
Congratulation for the tunner , PY1FW
Very nice build. 73
Nice job. If I was going to build a Tee, I would definitely provide a couple of vacuum relays in the circuit to short out either capacitor when tuning coaxial fed antennas. That would give you a low pass and high pass L to go with the T. The L is more efficient and unbalanced like coax. Most of the time when you are tuning a coax antenna you don't need much in values. Just a thought. 73
What a fantastic tuner, great quality 👍🇬🇧
Wow Peter that is nice. Great work.
Nicely finished project Peter. I have a couple of old capacitors and an inductor in my shed which I pulled out last week and was thinking how I might put a tuner together. I need to put them on the LC meter, but they look similar in dimension to yours so I expect will be suitable. Need to look for a meter dial for the inductor. 73 for now. Phil VK8VWA
Hey Phil, thanks for the comment. I gathered the main components over the years and then finally decided to build. Probably had the roller inductor for well over 15 years, so don't wait that long, get into it and enjoy the project. A good t-match tuner will be used all the time and last a lifetime.
I think the counter came from Nebraska Surplus and the planetary reduction drives I think are Jackson Bros.
Do you still have access to AllStar?
Cheers Peter vk6ysf
Nice. How did you make the lettering on clear labels on front?
Labelling tape, black text on clear tape, 12mm, brother tze-131, suit brother P-Touch 1000 labeller
Hi Peter, Rajesh VU3RHU from Mumbai. May I request you to share the construction details of the roller inductor, especially the roller part. Not able understand. Thanks
Just a standard roller inductor picked up at a ham fest, these are getting harder to come by these day and are becoming expensive.
could you please put up a build list I am very interested in this design. thanks KD2SER
Hey Bull.
See link for project details, if you need more information please do not hesitate in contact me.
vk6ysf.com/t-match.htm
Cheers
hi, what´s diference a T antena turner and Pi antena turner. 73
I think the T match is easier to construct as one end of the roller inductor is grounded and only need one roller inductor which are harder to come by these days. The Pi is possibly superior as is arranged a low pass filter and would there reduce harmonic radiation, however most modern equipment do not produce much in the way of harmonics, so not a major advantage.
This os actually a Pi Network not a T Network..
Peter, Good video on ATU's, I've looked through the links you have shown and I can't seem to find the black wires you use on the inside of the tuner. This is the lines of black wires are they 50 OHMS? in side the box. Would RG 400 coaxial work better with this tuner? de Dennis vk4oc in sunny QLD.
Hey Dennis, I just used RG58 coax and RG 400 would be fine.
de Peter vk6ysf in the wild west