Homebrew 8-band SSB HF transceiver (EI9GQ) -- Part 1 Receiver
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- Опубликовано: 27 авг 2024
- Demo of a scratch built 8 band HF SSB transceiver. This video shows the receiver, transmitter to follow. Design by EI9GQ. Build by VK3HN.
Click here for a more recent video showing lots of receiver improvements: • Homebrew 8-Band SSB/CW...
Blog post: vk3hn.wordpres...
Script: github.com/prt...
My god, This is absolutely incredible sounds clear love all the filtering. I'm blown away by it's sheer complexity and it looks amazingly well built. A top tier build in my humble opinion. Great video, I enjoyed watching it.
Thanks very much Simon. About 18 months later I came bamk to this project and did some more work on it, mostly adding the remaining bands, bolting everhthing down, and I added a proper AM detector, video here:
ruclips.net/video/uasUCzHxIcg/видео.html
Great work Paul...got the link from Bill N2CQR's SolderSmoke blog. You've shamed me into starting the build process as I've had Eamon's book on the shelf for a couple of years! 73 - Dino KL0S
Hi Dino, it's an excellent book, every circuit I tried worked, no exotic designs or components, and Eamon gives you choices for many of the building blocks. Highly recommended. See my corresponding blog post for further pics and details. I recall the push pull post mixer amp stage worked well, i was going to make a second one to use as an RF preamp. Good luck, and post your results. Paul VK3HN.
Wow Paul nice. You made me late for work... again. Haha Couldn't stop watching your videos on your radios. Can't wait to get back and watch more. 73
Thanks Dave, appreciated!
Fantastic
Tnx!
Amazing!👍 UR7WKH, 73!
Thanks!
great work! congratulations, 73
Tnx!
Gorgeous transceiver! 73s
Thankyou, still a lot of work to be done but coming along nicely!
Amazing job Paul. Congrats and CU on air !
Tnx Petr. Never did finish this txcvr, the Rx worked really well, will get back to it one day.
@@Paul_VK3HN Christmas "cold days" project? hi
@@michaelscoofield That's right, except that I'm in Australia so down here it's the Christmas heat!
Nice
Thanks
Total beauty. Congrats 73 from HI3MFR
Thanks Michel, there's another video made a few years later which shows it more completed. ruclips.net/video/uasUCzHxIcg/видео.html
that's beautiful I would put a clear plastic cover lid on it so you can show the radio off
Thanks, it's far from finished, gotta build the transmitter and PA yet, but I do like the idea if a clear perspex lid!
Awesome stuff! I think I'm going to get the book and maybe take a crack at building it, I don't know if I'll ever go after my ham license but at least it'll be interesting to listen to what everyone else is saying and I'll always have the option of getting it later.
Good luck with your planning, the book es excellent, I have a review on my blog vk3hn.wordpress.com/2018/05/07/building-a-transceiver-eamon-skelton-ei9gq-and-elaine-richards-g4lfm-rsgb/
@@Paul_VK3HN Thanks, I'll check it out! Well I've ordered the book, hopefully it doesn't take forever to get here. I've got a 3D printer and small CNC machine, if I build it and get it working I might see if I can design some things for it like a face plate, maybe some mounts for the PCBs and such, if I do I'll post them on like thingiverse or something.
@@Paul_VK3HN Do you by chance have copies of the artwork files for the PCBs in Skelton's book? I just got the book and the web links it refers to for getting them are no longer active.
@@joesmoe71 No, EA9GQs site is n o t up to date unfortunately and was no help in building his transceiver. However the book is more than good enough in terms of explaining his designs, measurements and supporting information. I prefer to make my own boards. He mostly does ugly construction over an unetched PCB piece. Good luck, the module circuits are all simple enough.
Great Job! Congratulation!
Thank you!
Prachtig!
bedankt.
That is very nice!
Thanks Lawrence.
Nice work! I built (well, its on breadboard currently) a basic direct conversion receiver but currently I'm using a function generator as my VFO. It works good though! Almost the same as yours! But right now I only have a highpass filter in it (starting at 3Mhz) to cut off AM broadcasts. If I amplify too much because of this, I get intermodulation on my "front end", which is just a NE602 mixer. I see you are using the Motorola mixer which has a higher dynamic range.
Nice stuff!
As soon as I can get a stand alone wave generator for my VFO I can box this thing up for a basic receiver.
Mine does the same thing on AM , too, where it 'wavers' the audio when tuned in. I don't know why it does that. Any ideas? I'm not running a tight enough filter, is that it? So my audio is getting both sides of the AM . Wow thanks for the video, that helps me understand what is happening there. I need to make a good 2.5khz audio filter.
Hi there, thanks for your comments and well done on your DC receiver. A NE602/SA612 makes a fine receive mixer, I've used them in a number of receivers and with a resonant antenna and a good bandpass filter I have no overload problems. The Rx mixer in this rig is a homebrew double balanced mixer using matched 1N5711 diodes, which is very similar to an SBL1, TUF or ADE series mixer. The beating you hear on AM is due to very small differences in your receive frequency and the AM transmitter frequency when using an SSB product detector. If you are a hertz out you hear a one hertz swish sound. It varies as either or both oscillators drift. Even if your VFO is highly stable, the other guys transmitter may drift. Peter VK3ZPQ who you here on 160m AM in the video uses a divided down crystal in his Tx. The beats you here are my tuning being slightly off.
Good luck with your radio making!
@@Paul_VK3HN yes, exactly i am not yet using bandpass filters for the "bands" so if i amp too much and some spanish shortwave on 6mhz can get through. But eventually i will think about some bandpass filters, probably make them switchable so i can listen to shortwave as well when i want. Thanks for the info!
@@researchandbuild1751 Bandpass filters and a decent antenna are essential. Then it will really work! Good luck.
I have NE602 transceiver and I made a very good BPF ahead of it and it works beautifully. You could also use a variable tuned circuit. 73
I agree, a good BPF in front of a 602 or SA612 does work well, particularly if you are in a quiet RF location and are not in a high population density area.
Fauloso no tengo tanto conocimiento estoy comenzando en fh espero llegar a lo que pueden hacer ustedes me gustaria tener algun contacto con ustedes ,soy de chile
Hola, gracias por comentar. Cada gran proyecto son muchos proyectos pequeños conectados entre sí. Comience con algunos módulos receptores simples, como VFO analógico, amplificadores y filtros IF, mezcladores, amplificadores de audio y el conocimiento práctico se obtendrá poco a poco. ¡Buena suerte! ¡Es un pasatiempo maravilloso!
Hİ Paul, how did you fix your Lcd screen to the cutted window ? Im placing components of qrp to encloser ( like board, Lcd, encoder etc...) of my MST 2 qrp. But i dont want use screw and and nut while fixing it to front panel due to bad visual. how did you fix LCD screen to the front panel, without screw and nut? heated silicon or glue etc ... 73
Thanks for your comment. The Arduino and display etc are mounted vertically on three pieces of aluminium angle, a horizontal piece and two vertical pieces either side. The big LCD is mounted against these verticals. The whole assembly is self contained and the base is M3 bolted to the chassis floor. You can see this in the video at 0:40 to 0:45 seconds in.
Is that clear?
To be clear, there are no bolts thru the front panel as you can see.
@@Paul_VK3HN ok Bro, i saw aluminium chassis which is Lcd mounted to , it is really genius action, your rig is really looks awesome, im your close follower. Thanks for your fast reply . Regards from Istanbul Turkey TA1TRX 73 👌👌👌
Good on you bro! The MST from OzQrp? I've built two of those a good design and well kitted by Leon VK2DOB. Good luck! Have fun. 🤓
@@Paul_VK3HN Exactly OZqrp, your countryman from Australia. I know VK2DOB and also i'm following him tube too. Thanks Paul for your support. Regards 73🙏🙏🙏
great job !
Thanks!
very nice trx I wish I could do it, but it would not work
Tnx we 73!
Please suggest the steps to buld this
wp.me/p628gp-23b
ruclips.net/p/PLlempERfC_6JOOug99ropUI8LZcI2xFRi
@@Paul_VK3HN thank you sir
How way arduino for lcd 20x4 this ..sir ?
The Lcd library I used takes the number of rows, columns as arguments to the constructor. It's easy to do!
@@Paul_VK3HN but on the display is two bar .?
@@syarifudin8941I'm sorry, I don't understand your question. 😢
Sorry sir.
What use I2C the board arduino to lcd is 20x4 ?
@@syarifudin8941 I did not use I2C to connect the 20x4 LCD to the Arduino. It is wired direct, in the usual way, just the same as you would wire a 16x2 display.
Where your QTH?
VK3, Melbourne Australia
What book or literature to build one for learning purposes? 73
vk3hn.wordpress.com/2018/05/07/building-a-transceiver-eamon-skelton-ei9gq-and-elaine-richards-g4lfm-rsgb/
@@Paul_VK3HN Great. Thanks a lot.
@@Paul_VK3HN Ordered the book and it is on the way. It seems to take some time, but should be here soon. Thanks a lot once again.
Would somebody please invent a 6 meter only xcvr kit .
@@paulmanoli5175Six is an under served band for kits. I'm not aware of any. The main issue for me is the lack of activity, outside of a narrow summer sporadic E season.
KD projeto amigo ?
Mande pra nois !
reginaldoeustaquio@yahoo.com.br
Thankyou Reginald 👍