AM / FM tuner TEF6686 controlled from the computer

It worked. Thanks for the help.

armin12 wrote:

How is it not analog? DAB + is not there, so it is probably not a digital radio. There is AM and FM also analog radio only.

The FM radio is analog, the tuner described here is a device with a digital signal processor. In details, it differs from regular FM radio, but in blocks it is the same. It has high sensitivity and selectivity, and in addition, digital processing significantly improves the reception parameters.

armin12 wrote:

It worked. Thanks for the help.

The signal graph in your screenshot looks strange. Anything at all changing? This is how it looks for me.

This is what it looks like at 120 kW stations from the nearby (10 km) RTCN in Sucha Góra, for example, this is how the Three looks like:



Yes, Jedynka - just like RMF FM



At weaker local stations, not broadcasting from RTCN, and from other venues, a bit changes, e.g. here Złote Przeboje:



Trendy Radio here:



And this is what it looks like at distant stations. Here is One of the Holy Cross:



In places where there is nothing (noise) it looks like this:




Generally, this FM tuner receives very well, it is very selective. Yesterday evening I caught RMF FM, Jedynka and Trójka from Raszyn, 300 km away from me. The three of them were in a slightly humming stereo, sometimes even loading RDS. It is weak on AM, but it is probably because the antenna (Dipol 3 RZ B) is an antenna for the VHF FM band. All it catches is some Russian station on 999 kHz. At 225kHz, where the One should be, I only have noise.

And what are the RF + and IF + options? This is some gain, when I click, the amount of dBf increases, but there is no difference in reception.
Maybe someday, when I have some time, I will record and throw some bandscan.

You must have some very old soft in this atm, the signal level varies by 1 dB, you have no decimal values, and that was done quite a long time ago. Note that in my graph you can see what is happening between 77 and 76dBf.

Perhaps. It is connected via Arduino, according to this diagram and the code given there is uploaded: https://github.com/RTVDXRO/TEF6686-AM_FM_RDS-Radio. I have the XDR-GTK program from the first post on this forum: http://dktr.pl/XDR

dktr wrote:

You must have some very old soft in this atm, the signal level varies by 1 dB, you have no decimal values, and that was done quite a long time ago. Note that in my graph you can see what is happening between 77 and 76dBf.

What could such differences result from?
I also bought this tuner module, but I did not run it - I was wondering what to control it? What's going to be the best?

Well, I wrote that he has an old soft in the processor, which is between the tuner and the computer. In the first post, I turned on the soft, which has it already covered.

Will Arduino Mini or nano be sufficient to work with this FM tuner module?

I do not know what is on these "arduino mini", because there is a lot of it and it is not known what it is about. Atmega328 is enough for this task.

@dktr
I checked - these Arduino have Atmega328-20AU (SMD case), Arduino Nano (and clones) and ATmega328P-U (DIP case) Arduino Uno (and clones).
Did you do everything yourself with this microcontroller? Do you have any buttons and LCD connected?

I don't use arduino, I prefer bare atmega. But when the m328 sits there, it will be fine. This is how I connected displays, buttons, encoder, IR receiver, etc.

How did you connect with Denon?
I2C or what else? My guess is that you have data from the driver on the display.

Nothing, only the housing, transformer and cinch sockets remained from the Denon.
Decorated front-panel buttons on universal boards, VFD display from a fiscal printer :)

It turned out nice
It probably sounds like Denon - ie sensitivity, selectivity and other parameters?

It sounds like TEF6686. Originally the Denon worked, but its parameters were much worse than that of TEF - when it comes to sensitivity and selectivity. In addition, it already had a bright VFD display and almost nothing was visible, so I treated it as a housing donor

I recorded Bandscan on TEF 6866, in Krosno, Podkarpacie. The antenna is a Dipole 3 RZ B. I invite you to watch:

https://www.youtube.com/watch?v=Jm6o4VDd2Gw&ab_channel=AdamosDX

To display caught stations and transmitters on a regular basis, turn on subtitles.

The TEF 6866 is a very good, sensitive and selective receiver. It receives a lot of very distant stations, as evidenced by the video I shared

Decent results, have you tried with a better antenna?
I used the Quad in my apartment and it sounded pretty good - I have a maximum of 7-8 km to a dozen or so stations, and I would be able to receive it on the wire. But there is a difference - a good FM tuner compared to a home theater.

I bought the TEF6686 FM tuner module, but I didn't start it - from what I can see, the simplest controller should handle it (in the sense of the simplest Atmega).

Hello,
I purchased a tef 6686 fm tuner and would like to swap in my android car radio. What will I need to make it work, any drivers, will the app that is preloaded handle this module?

It doesn't work like that, you swap it and that's it. It communicates over i2c and I doubt you'll find an android app that supports this tuner that way.
We're in a period of elevated tropospheric conditions right now and this tuner does a pretty good job.

Is there a way to embrace it?

>>19665798 I also have such a radio, after connecting to a 4 x 20,5 m square antenna on 4 masts h=7,5 m I have all-day reception of UKF stations from Gdansk to Krakow (and Krosno also catches). The radio is great. I installed CH340 driver on PC and comp sees this radio. Now I'm just looking for a good software to control the radio from PC - what can you Fellows suggest? In the first photo the TEF6686 radio, in the second photo the current consumption at 5 VDC. I also attach a list of stations heard in Warsaw on this radio connected to the aforementioned antenna.

.

The 4x20.5m antenna is not an antenna for the FM band, better results would be given by an antenna for this band.

Quote:

after connecting to a 4 x 20.5 m square antenna on 4 masts h=7.5 m I have all day reception of UKF stations from Gdansk to Krakow (and Krosno also catches). Radio great.

This kind of reception is very difficult without elevated conditions from central Poland on Yagi antennas on the right bands with considerable gain let alone on a piece of wire for KF bands. Someone is misrepresenting the truth here.

Here's the thing - the antenna does not work better because it is large only works if it is effective.
DX are possible, but on a matched antenna with high gain - the condition, of course, is elevated conditions in the troposphere.
Sa in the network information keidy such conditions are forecast - I was able to receive FM stations distant about 230km 3 to 3 hours before the storm from the direction of the transmitter. Antea was a dipole with a 300 ohm wire and a tuner built into a portable radio.

>>20772110
This is how I get reception downstairs - the signal is better from this 4x20.5m antenna - probably because the signal from the omnidirectional UKF antenna (mounted at about 9m high) is split by 3 antenna splitters along the way. Upstairs, as I connect directly to this UKF antenna, the signal is better from the UKF antenna - see the table in my post.

Added after 5 [minutes]:

dktr wrote:

Quote:

after connecting to a 4 x 20 square antenna,5 m on 4 masts h=7,5 m I have all day reception of UKF stations from Gdansk to Krakow (and Krosno also catches). The radio is great.

This kind of reception is very difficult without elevated conditions from central Poland on Yagi antennas on the right bands with considerable gain let alone on a piece of wire for KF bands. Someone here is mistaking the truth.

But such reception I have (and this is not tropo, but continuous reception) - unbelievers I invite you to a site visit
Please compare my performance (--> table !) when connected to the KF antenna downstairs and the performance when directly connected to the omnidirectional UKF antenna (the signal from this antenna reaches the socket downstairs after passing through 3 signal dividers).

This is another matter. Simply put, an antenna of this length will work well somewhere on KF, e.g. around 7 MHz or even 3.5 MHz, while on UKF it will be a random piece of wire having negative gain. I recommend going with this radio and, for example, a three-element yagi antenna to some mountain then only then will show what sensitivity and selectivity in TEF6686 can do.

sq3evp wrote:

A 4x20.5m antenna is not an antenna for the FM band, better results would be given by an antenna for this band.

This is how I get reception downstairs - the signal is better from this 4x20.5m antenna - probably because the signal from the omnidirectional UKF antenna (mounted at about 9m high) is split by 3 antenna splitters along the way. Upstairs, as I connect directly to this UKF antenna, the signal is better from the UKF antenna - see the table in my post.

This might be so despite the antenna mismatch, but better results would be for a yagi for the FM range.
A omnidirectional antenna has too little gain to play with DX.

I agree with my colleague, I need to talk to my neighbor (he has a flat roof at the height of the 3rd floor) to make the roof on his house available to me for such tests (TEF6686 + Yagi antenna) and then I will enter this performance in the table (or rather I will create a new one, because after all I will have to add another column - azimuth of the Yagi antenna) .