025 We use Baofeng's "heart" for Our Projects (SA818, DRA818)
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- เผยแพร่เมื่อ 12 พ.ย. 2022
- Most of us own a Baofeng. It is cheap and does the job. What would you say if we could transplant its “heart” and combine it with a Raspberry Pi or an ESP32? We would get a dirt cheap and compact device for all sorts of analog and digital modes.
Links:
SA818: s.click.aliexpress.com/e/_DCp... ((write VHF/UHF in order))
SA828 Walkie-Talkie on aboard: s.click.aliexpress.com/e/_DCp...
SA868 2W: s.click.aliexpress.com/e/_Dep... (write VHF/UHF in order)
RT85 Handheld: s.click.aliexpress.com/e/_DDg...
Used Board: github.com/digixx/VHF-UHF-Mod...
RDA1846S datasheet: bit.ly/3tscO6A
Build-a-Pi: github.com/km4ack/pi-build
OH2LAK: oh2lak.blogspot.com/2017/06/e...
HamVoip: hamvoip.org/hamradio/818_tran...
SA818 software: 0x9900.com/programming-the-ra...
AT commands: f4hok.wordpress.com/2020/03/1...
Arduino Library: github.com/darkbyte-ru/SA818
MAX9814 datasheet: datasheets.maximintegrated.co...
Shari project: kitsforhams.com/shari
Shari Hotspot knock-off: s.click.aliexpress.com/e/_Dkx...
SA818 Datasheet: dmr.md/upload/uploads/SA818-1...
DireWolf/Xastier intro: • Direwolf - From the be...
Voltlog's SA818 hat: • Get Almost Unlimited R...
Filter Datasheet: www.minicircuits.com/pdfs/LFC...
The links above usually are affiliate links that support the channel (no additional cost for you).
GitHub: www.github.com/sensorsiot
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This is absolutely amazing. I remember back in the 80's doing RF electronics was very complicated with lots of math and circuit design expertise needed. Today things changed drastically. Building complex electronics projects feels like playing with "LEGO". Everything connects to everything by SPI or I2C and you get the job done quickly.
I learned a lot from your great video !
RF Know-how still is needed, particularly if something doesn’t work;-)
But I agree: We live in a wonderful electronics world.
It all comes down to the projects dedicated to making open source hardware and software for the community, Arduino really put it in motion and obviously much has advanced since then, but a lot of the standards for the components came from that project and appear to be solid.
Last April (2022) we used this SA818 on a Raspberry Pi Hat in a weatherballoon we launched in collaboration with a local school. The HAT also had a GPS and soundcard so it could send back sensor data, APRS and sstv during flight.
The HAT was specificly created for this purpose and software control was a combination of Direwolf and python scripting.
Nice project! And more advanced than mine.
Let me see pls.
@@poorin5788 th-cam.com/video/nDmBcNWFE1Q/w-d-xo.html
I was surprised to see the face of the guy with the Swiss accent on a different channel. Instantly subscribed. nice.
Welcome aboard the channel!
Oh wow!!!, this comes at the perfect time when some of us are getting back into packet radio (not APRS, proper packet chat and BBS')
Cool!
We just got back from a trip to Ireland and visits to Valentia - the first transatlantic cable and Clifden - Marconi transatlantic station, complete with condenser building (90 metres long)! The excitement today of establishing a working wireless link is still intoxicating. Imagine what those two stations experienced. Pioneering history. Nice video as always
I was there, too during our Ireland trip a few years ago. Indeed, for them it must have been exiting to hear such signals which are given for us today.
Brother, you blew my mind again!
Your channels are treasure in YT "content sludge". Thank you.
You are welcome!
Great video. I'd love to see a ESP32 use Bluetooth to connect to an Android phone app. We could use it as an interface or send data direct. The module would simply have are the RF stuff in it, plus a battery etc.
Then somebody has to write the TNC sofrware…
You could connect via WiFi and do the DSP on the Android phone...
@@HB9BLA The KissTNC runs on Arduino and is open source, maybe porting it is doable I don't know...
Reticulum?
oh man this would be SICK if we could get a mini vhf/uhf pi hat to do digital modes and other stuff
I am confident that it will work…
Certainly something that would be very useful. VK2DU
@@HB9BLA ok but series of chips/dev boards can i look at to stuff a cell signal into a steam deck?
I just finished my gerber file for an SA868-V (2 watt version of the 818) with a built in sound card in a pi hat format. Im probably going to send out for manufacturing about 10 or 20 for a first prototype run next month.
@@johntetreault have you done his yet and are they available?
What you want is an I2S stereo CODEC talking to the RPI or ESP32. Split the stereo to L = LocalAudio, R = RadioAudio - with the individual channels optimized. If you want more radio modules, they make 4-channel I2S codec that only needs the single I2S data-lane (2x16-bit split audio channels per 32-bit I2S channel period). That would still work with a minimal ESP32, and would give you another 2x radio slots for 3x total radios and a local mic/speaker.
Good idea!
A note about the low pass filters. The Baofeng-style radios use the antenna for the low pass filter. Some regulations require harmonics measured at the transmitter while others use the transmitted signal. The latter are generally associated with inexpensive radios where the antennas cannot be removed. The higher the Q of the antenna the better - for more than one reason! 73, Chris K9EQ
Maybe, I never made such measurements. But most antennas I tested had resonances at the harmonics, too.
And the Baofengs have connectors. So the regulator here will measure there.
my previous DIY radio project involved interfacing the Kenwood connector on my UV5s. This is a game changer - thanks for sharing!
You are welcome!
Very cool project... I'd love to see an esp32 based igate/digipeter using this for APRS. Who needs a pi? 😆
Thank you. This was one of the applications. BTW: We already use the ESP32 for LoRa APRS on 70cm...
@@HB9BLA I more meant "real" (interoperable) APRS on 2m, not LoRa. I'd love to see an esp32/sa818 open source combo board to allow for both simple and inexpensive digipeter and igate setups.
I like your voice, your accent and your self humor. Gruezi!
:-)
FRS is a public walkie talkie frequency that cheap consumer units use, people get them for camping and convoys, at least in North America.
You are right.
Nice to see Charlie's work
I like his channel!
Interesting stuff. I could do a PCB design, but I won't be able to start until January. I'm sure someone will have it done by then, but if not then let me know and we can design the hat you need. 🙂
Thank you. I found somebody who wants to do the job. Let’s hope we have a prototype till January. Otherwise I will come back.
@@HB9BLA just finished the gerber file for SA868-V with i2s sound card on a pi hat. No kludgy usb wires, all going through pi gpio... Sending off to manufacturing shortly.
@@johntetreault Cool! Is it for the "normal Pi or for the Zero? We head for the Zero because we do not need too much power and memory for the applications in focus.
@@HB9BLA its regular pi hat form factor (only way to fit everything on the board) but it will work equally well on either a regular pi or the zero since theyre same gpio pinout
@@johntetreault I'm curious what I2S chip you used. The WM8731 we could source turned out to be a fake.
Thank you for a such well documented video!!!
Glad you enjoyed it!
Awesome! This is a great video, So many cool projects could be made with these modules.
I agree. Just started one with two modules for satellite work…
Very nice. A friend of mine has an open source project that uses a CM108. The small PCB has some support circuitry to break out the audio in/out and CM108 GPIO (exposed on the SMD version of the CM108) for interfacing a radio. I love that Direwolf can control the CM108 GPIO for PTT out of the box. I've been using his project now for 3 years and it works great for Direwolf + Pat on a Pi 3. We've also experimented with the NinoTNC for 9600 VHF packet via Direwolf. I've seen a few others build hats exactly as you describe. I'll have to find that project and send it to you.
I found one from 2012. but not in the Pi zero form factor…
Thank you, Andreas! As usual, I don't need this right now. So, your video appear for me in the perfect moment. In the future, when I need something like this, your video is right here. Thank you!
You are welcome!
Brilliant! Thanks for such a great movie and info.
Glad you enjoyed it!
Thank you, it helped me to solve doubts that I had about the module. A greeting.
Glad the video was helpful
Hey, its that Swiss guy tearing apart radios! Nice!
Actually, you do not need to tear your radio apart. You can buy these modules separately.
Very excited for a winlink video, it sounds really cool but I haven't found any good explanation/setup videos.
We will see how far I will come…
Very neat, stumbled upon this while looking at options to build some new Fox Transmitters. I want to broadcast recorded voice audio rather than what sounds like musical tones. Have more fun taunting people. :)
Go for it!
Those modules are already old, we used them 5 years ago and have happily moved on to better chips and modules.
Which ones do you use now?
Excellent video! KM4ACK is definitely a busy guy! Nice stuff!
Thank you!
Amazing, as always!
Thank you!
Excellent ! Btw, next week, in Köln is the PMRExpo... plenty of Baofengs and many more to discover !
I do not think you will find a lot of Baofengs in Germany. They are forbidden there. But for sure other nice stuff!
@@HB9BLA It's been from before the pandemic that I've been there. So, in 2019. At that time there were many. Maybe they got prohibited afterwards or they have other models that are legal. I'll have a look next week ;-)
Morning Andy, good show mate.
Thank you!
Thinking about getting back into HAM radio and I was surprised at the pricing of htese HT's and the secret is SDR SA818 etc thank you for the excellent video ......now my mind is really going bezerk with all the diferent directions one can take {KISS a tech license and starter Boafeng... back to focus}.
Indeed, the possibilities in HAM radio increased and the prices came down...
Thanks again for yet another amazing video. Do we need a ham radio license to experiment with this?
thanks again for another informative video.
You are welcome!
I am a boat owner and these radios work great for marine vhf band - not impervious to salt water, take that with a grain of salt!
If it was set to single band mode operation only, could you cover it in potting to weatherproof it?
i keep it in the cabin the steel parts rust, when it fails i will buy another, been going for about 4 yrs now
That is illegal. You need to be using FCC typeset radios. I’m telling.
Also, I love you channel!
If you’re looking for video suggestions, I would love to see a FRS radio implemented in GNURADIO. I tried myself and it does work, but for some reason my generated CTCSS tone has some phase spurs I can’t get rid of using the sine signal source.
AFAIK FRS is not allowed in Europe.
@@HB9BLA Any similar systems using CTCSS? I think just would be cool to see a NBFM channelized system that implements CTCSS.
This was really interesting! I may have to give this a try. It would be cool to run a winlink node but I am not sure that would be possible.
It should be possible. The question is the speed.
I have a few of those modules (DR818 VHF and UHF modules), and have been looking a bit at finding info for programming them. Bingo, and thanks Andreras.
OZ9QV, Jan.
So you can go ahead with your projects ;-)
I immediately love this video
Very good!
I designed an ESP32 controlled repeater around the SA818 modules that can fit in an Altiods tin. (At least once I get it made.) I also found that my SA818's meant for 70cm respond and work properly even when setting the freq to be in 2m. So not sure whats up with that.
1. I am interested in your ESP code. Is it documented?
2. Another viewer reported all that they work on both bands.
Very nice ! You look like an expert in electronics, maybe you can help with a long time question on the UV-5R: what is the purpose of the trim potentiometer in the transmit circuit ? If you have the diagram, it's called VR2. I haven't been able to find an answer to that question anywhere...
I have no idea, I never opened one.
Thanks for the video. I think I found my winter project. 73 de Tez.
Cool! Tell us about it when you finished it.
Very interesting project. At 10:00 you mention video #419 about working with audio on the ESP32. I can't find that video here or on your other channel. Can you give me a link, please?
TH-cam deletes comments with links. Just search with #419 and you find it on my main channel.
Nice work. Is it possible to reprogram internal DSP for AM or other modulation output?
I do not think so
I have 4 of those modules here waiting for me to do something with them. I set up a cheap DVR with audio inputs and some HTs as a way to continually record the repeaters we own in case there are technical issues, or people issues. I wanted to make a carrier board for 4 modules that would allow 4 discrete frequencies to be received and sent to the DVR instead of having 4 HTs in chargers. I'm willing to pay someone to design this if interested.
One of my viewers does a PCB with 2 boards. Mainly for 70/2m satelite work. Maybe this one could be used…
let me ask you a question. is it possible to run something like meshtastic through a baofeng to increase the range of mesh nodes?
LoRa boards have a longer range than the Baofeng modules.
Wonder if it would be possible to encrypt and decrypt incoming signals through the Pi before input and output respectively.
For HAM radio, encryption is forbidden.
Hi Andreas, Thank you for the great leaning materials. Regarding this module, is it possible to use it for CW? Just got my very-very-beginner HAM license and I am still not allowed to build my own radio but I am learning for the next license level and, in the meantime, try to get more information. Many thanks!
It does FM. Without modulation, it creates a stable tone that could be used for CW. But I think, the on-off speed is not fast enough. And the receiver does not "hear" CW
Thank you very much!
Look at the Nexus DR-x and the Fe-Pi sound cards. Pi Hat for sound in/out
What I want is not only a sound card. I want a SA818 on it, too ;-)
And here allllll this time I've been watching your other channel, yet I had no clue you were an AMATEUR!😛 Sure explains a lot!
--... ...-- / -.. . / -.- --... .- . -.-
I have my license since 1977 ;-)
@@HB9BLA since 2019 here... REALLY addicted to building antennas from scratch!
Thanks!
You are welcome!
Is it possible to use unfiltered audio with the radio chip for 9600 baud ax.25, m17, vara fm wide, etc. ?
These chips do not support 9600 baud :-(
New to the radio world! Very minimal experience with raspberry pi and chips in general but would it be possible to add "encryption" to the baofeng or with the digital signal?
Technically yes but not legally in the US or most other amateur radio countries! Here in the US the FCC mandates that any operator must be "able to receive and interpret your signal" so as long as your format is published and can be understood by another ham, you're all good!
Kenwood is Right.
You can encrypt stuff on public bands like LoRa (FRS?) if you aren’t operating as a HAM, the restriction is part of the licensing... so in North America as a HAM you can use the 433 MHz LoRa band (or 915), but it has to be unencrypted, whereas the public may only use 915 MHz, but it can be encrypted.
I know I am asking some very old questions that I have not found any answers to yet:
1. is it possible to program the chip to give you raw or unfiltered RX (for 9600 baud packet) nor not?
same interest in transmitting higher speed data than 3KHz/1200baud
2. Do these SDR use any kind of a (VHF/UHF)Local Oscillator and IF frequency (internal to the chip) for RX and any idea what it is or how to find it?
I was just going to put an antenna and spectrum analyzer near the chip to try and find it.
THANKS!
This chip is an FM transceiver. It is used for low speed packet because it only has the standard voice bandwidth. And I think you find the LO frequency on the xtal pins of the RDA1846 chip inside the module. I assume it is close to the receiving frequency because the DSP wants NF...
@@HB9BLA Thanks for the reply, by LO I mean the RX injection LO not the crystal clock frequency.
Assuming there is a mixdown from 460MHz or 150 Mhz before brought down and sent to the SDR.
Not sure what you meant by it wanting "NR".
Please explain.
I don't expect SDR happens directly at 460 or 150 MHz. :)
I could be wrong, but not going to go and admit that.
Also the RDA1846 is "hardcoded" for low bandwidth voice. It *could* physically do 9600baud or higher bandwidth IF they wanted it to and could have added this to the command set.
But they did not.
Just like it can do 25KHz FM or 12.5kHz FM RX+TX modes. It could have been given the ability to do wider modes.
Limited in software.
FM RX mode on (65-108MHz) is programmed or "hardcoded" to make the chip do a much wider RX mode.
Could have been done for UHF/VHF to make it higher speed data capable.
Fun stuff anyhow.
Cool video.
Thanks!
Herr Spiess, as always, another great vid! Great value. Very therapeutic for me (and nothing wrong with your accent : )
Danke schön!
Thank you!
It would be very cool to be able to use this simple approach to make an ssb based device for 2 m or 70 cm operation. For example - an easy to build Wspr client. Is such a thing possible with these chips?
They only do FM
I hope you make a video about passive radar,
Thabk you for the great videos
What is passive radar?
@@HB9BLA i
I know this video is a bit long, but you can skip the part about conventional radar
th-cam.com/video/lDTg6tnBv0o/w-d-xo.html
I wish the Baofeng would support API calls from a PC out of the box, so you could control the device easily to grab data from certain frequencies.
They use the microphone and loudspeaker connectors for data communication:-(
are all features of both the "Quansheng UV-K5" and "Baofeng's" legally allowed in Europe and Switzerland (or e.g. do you need special permissions)?
The Baofengs are forbidden and I fear that the Quansheng will go the same route if they did not add proper filters.
@@HB9BLA thx
This is some mad hackery!
Yes.
These modules are all FM, yes? Is there an equivalent that is capable of SSB/AFSK for other digital modes? Yes, I'm talking about you FT8 & WSPR.
I do not think so.
Are you able to access the ADC/DAC of the internal SDR chip directly?
I do not think so.
Look to the AudioInjector Zero.... it is a sound card hat for the pi zero.... I'm using a DRA818 and the AudioInjector Zero for an APRS digipeater
Thank you for the info. A good solution. Currently, we design a Pi hat with a souncdard chip and a SA/DRA818 to save space...
@@HB9BLA nice. Got a link where one can get that? Does it have band-pass filtering circuitry added? Im running a solar APRS digipeater with the DRA818 module from SV1AFN and the audio injector.... Id love to transition that to something that is combined onto a single pi hat, as it will be less of a rats nest of wires in the outdoor enclosure.
@@HB9BLA the other project im working on is using two of these DRA818/SA818 modules interfaced with a repeater MMDVM board and see if theyre capable of being used to build a portable DMR repeater.
@@johntetreault It will surely appear on this channel if it is ready...
@@johntetreault I have an Echolink device with an SA818 HAT on an Orange Pi mini. This board already has a sound car built-in...
The SA818 has an SDR at its core. Has anyone been able to get it out of FM and do SSB or a raw module signal with modulation from a software defined radio on the Pi?
I do not think that this is foreseen (no pins with such signals)
Awesome!! I can't find a cheap full duplex headset for my kart sessions... I tried Bluetooth headset, but I need about 300 meters of range... I haven't a deep pockets but I don't know to program chip... Can you help me? Thanks a lot
Duplex is hard. I cannot help. TH-cam is my hobby
Awesome!
Thank you!
Can you just use the SA868 instead of the SA818, for example on the same module board? It looks like the programming manual is the same.
AFAIK they are the same.
Where can I find? ...
This looks like a great setup. I am a pilot who is NEW to SDR and am asking for help to find out the best way to connect the voice input received by the device into voice recognition software on the PI using the Python PiAudio library. I want to be able to call the receiver at my grass strip airport to command the PI to read the wind direction and speed from a weather station and broadcast the information back to me. (Airband in North America, the spectrum from 118.000 to 136.975 MHz is used with 25 kHz spacing and AM). Instead of voice comands, I could - lets say - click my aircraft radio transmit button 5 times. The software on the Pi would have to know how to count the transmit clicks. I have no idea how to do that.
Any help appreciated. Thanks!
When I returned to the field in Venice, I had to key the transmitter a few times to swithc on the runway lights...
The question is if you need to use your official gear or you can us a different frequency, If you can use a different one, I suggest to look at LoRa (I have some videos about it on my main channel). It offers a data connection on 915MHz ISM (license free) band.
I wish there was a 6m / 4m version of the rf modules, I've been trying to find a way to build aa allstar / echolink node on those bands for a long time now... Does anyone know if they exist?
I do not know.
I contacted the company some years ago and they said they can offer the module for any band requested. Even 10 meters.
@KJPage oh really? I never really considered asking them directly, I might reach out and see what they say. I'm a little apprehensive about the minimum order quantity for a specific order though :-)
Thanks for your reply!
I would love to buy this low pass filter and others but can't find them on Ali.
They are available on Mouser and Digikey.
What is the range of this project when sending digital signals?!
Depends on the antenna and location. It has an output of a bit less than 1 watt
I have to get my license. I rally want to build a DIY AIS transiver
Go for it!
5:09 is that a whitespace error there between the S and the 0 ?
Yes. My mistake.
hi Andreas,
QQ, did JLCPCB mount all the parts and SA818 or just Maxim?
73 iu2omt, paolo
They mounted most of the parts. Not the hand soldered.
@@HB9BLA mmm, even if one years elapsed, the price to assembly 5 units was very cheap considering SA818. I paid €22 for the last i bought and €10 at beginning of '22
@@fpaolo63 The SA818 was hand-soldered and not part of the price.
Do you have something to open vehicles?
Usually my key ;-)
I love it good
:-)
And how do you solder the components for yourself?
Either with a soldering iron or with hot air
Could this be used to build a diy ads-b in/out?
I do not think so. Wrong frequency
Like the disturbing switzer signal
Thank you!
#1. All in one, bluetooth APRS module. Think of a Mobilinc TNC but with a transmitter built into it already. That way, you just connect your phone or bluetooth tablet (or laptop) to ONE device and go. #2 Self contained, stand alone APRS digipeater/igate. There are a few on the market but they have TERRIBLE software and are very expensive ($200usd and up). Something that is low powered that could be solar powered would take the place of LORA Mesh units that everyone is talking about, but have better range than a few hundred mw on 900mhz. Also, Denis from Digirig was working on a Pi Audio hat. There are many on the market, but have seem to fallen away or are very expensive.
We get now LoRa APRS. And do not underestimate LoRa. I bridged 200km with a simple 100mW module and a very small antenna. Search for „world record „ on my main channel if you are interested.
Someone finally did it. Combined the SA828 with an esp32 and created built in aprs digipeater mode
Andreas,
I maybe misunderstood. Are you looking for help to do a raspberry Pi hat PCB? I would love love to help on this if I didn’t misunderstand. I loved this video and I am ready to sink my teeth into it.
De N5BOC.
Thank you for you offer. Yes, I would like a Pi zero hat. But I already got help for the moment. Another viewer started already.
I have had bad experiences with Orange Pi, they tend to die after 1-1.5 years. How are yours?
I had 2 working 24/7 (running domoticz). The fist fried within a year but the other one is OK still after 2 years since I under-clocked it a lot till the CPU t° was reasonable and I added a few heat-sinks also (but no fan).
Mine productively runs for 6 months. But on low load.
I have a couple (with copper heat sinks) running 24/7 in small junction boxes for outside use for different SDR projects (low CPU usage). They run fine after 3 years in operation. On the other side, I have some other OPIs where the SD card slots broke, or the HDMI connector broke after 12 - 18 months of use (used 1 - 3 times a week).
My two orange pi zeros work fine and are 4 years old by now
Mine had a broken SD card reader, they seem to be badly soldered.
📻 I want to build a all in one scanner like the HRD-747 but running off a arduino or esp32. Using the sa818 modules I thought it could be a good idea. The goal is fully open sorce radio communications.
There are some scanners on the market but I want one that looks and feels like a handheld radio. Or is at least pocket size like the HRD-747.
All ideas are welcome.
Comment here if you're interested.
I would use an SDR for a scanner. Much better suited.
👍👍
What about Codec2 and FreeDV?
I do not know much about those projects:-(
@@HB9BLA I think you have the basic elements in this hardware to give this digital speak mode a try
@@HB9BLA I thoroughly recommend trying the free and open FreeDV mode and software and have a read up on what Dave Rowe does
Hiii man....🎊🎉🎉🎊🎊🎉🎊🎊🎉is it possible to get any response from security devices like (sensors, CCTV, Alarm system WITHOUT INTERNET CONNECTION and POWER CUT...
How could we handle these type of situations...
I do not think so.
@@HB9BLA what does it mean...🎉🎊
Not working without internet connection and POWER right....!
0:20 - Small bugger??
Yes, I think so.
Are you familiar with SHARI?
No. I just found the project.
@@HB9BLA there is another product based on the 818, I will forward the link when I find it again.
@@bvodall TH-cam deletes most of the comments with links. A good search term is a better idea...
the state of healthcare in this century
??
Asre you andreaspies?
Yes
FYI …. Hamvention presentation of kids that built a balloon based repeater using these modules th-cam.com/video/G4eaChIjk8E/w-d-xo.html
Thanks. Interesting project. Unfortunately, he never added the HW to github :-(
Нихрена не понял ,но очень интересно !:)
i need code for esp32 😂
Should not be too difficult. We plan a board with an ESP. But it will take time
@@HB9BLA Thank you, I'm waiting
🤣👏👏👏
There is no callsign HB9BLA on the FCC database. Why is that?
Because I am Swiss?
and this will never be supported ever again..
I do not understand :-(
As I suspected. As with all Chinese products, a cheap copy of top shelf tech. Possibly even stolen. Filters needed, of course, it did not come from a land of Laws. I bet you could not put your hands on a Motorola class chip for that price. Excellent presentation, the chip is available and should be studied it's a good example.
I am no lawyer. So I do not know the possession of IP. So I just enjoy the modern possibilities ;-)
Andreas how often do you check discord? ill post the things that i found there. ( about kicad)
kicad sure we can talk in your discord
is ok nl5778
???
"cheibeguet!" und wunderbar präsentiert. 73 de (ex) HB9BLU. DANKE!
Vielen Dank! 73 de HB9BLA