Homebrew 80m/40m SSB/CW Rig - Part 7: Receiver Tests

[@gasturbine101]

Amazing piece of work and and surprising to see just two IF amps to cover the conversion loss of the diode mixer and insertion loss of the crystal filter, well done!

[@RajaramSrinivasan59]

Hi Charlie! A work of art. That's what your beautiful layout looks like. It's like seeing the innards of electronics working! Fantastic stuff to learn and to teach. Terrific work. De VU2RJV handle Rajaram from India.

[@CharlieMorrisZL2CTM]

Thanks. I have said many times that I like to look in and see what each module and component is doing. That's where I get my enjoyment.

[@twister8884]

Hi Charlie. Great video series, I have learnt a great deal from watching, many thanks. One thing I'm not clear about, what does the A/B switch do, is this to switch between CW and SSB?

[@leeaudio027]

wow just love your craftsmanship, enjoy the walk through..!!

[@travainiandres3143]

Hi Charlie, very inspiring videos! Just few questions. How much power do you get to the mixers? Is it enough to fed the DBM mixers with the SI5351 directly? Have you seen an increase/decrease of spurs when you configure 2/4/8mA drive in the SI5351? Have you seen a difference if the output of SI5351 is driving a 50 ohm load or a higher impedance one?

[@skylabby]

These project make my eye google.. love them to the max.. can't wait for your FT8 or 2M projects, if youre still gonna do them...73s

[@CharlieMorrisZL2CTM]

Thanks. I have a number of ideas on the books. I will have to have a think!

[@jmayoral]

Hi Charlie, thanks for your videos. I always learn something new ! Question, is the output of the Si5351 filtered? It seems to be fed directly to the diode ring mixer? I could not find anything in the blog regard this. Thanks for sharing all of this!

[@brianbloom1799]

What a nice build, Really Great ssb Radio. Hope all works well, I wish I was able to build this but being almost Blind and in my 60's won't happen, God Bless

[@Anthony-sf2rk]

Хорошая работа! Выглядит очень опрятно. Только выкладывайте схемы и другие материалы, чтобы зрители могли повторить.

[@tcarney57]

I like that you resisted going the Arduino "menu" route and rely instead on rotary and toggle switches for your inputs. Menus may be necessary for portable rigs owing to limited front-panel space, but they're a totally-unnecessary bother for a stay-at-home rig. --Todd K7TFC

[@CharlieMorrisZL2CTM]

Agreed. I like the look and feel of a real switch. Not to everyone's liking, but that's fine.

[@dare-er7sw]

@@CharlieMorrisZL2CTM What if you used a 24MHz SSB filter? The front end would then need just one LPF.

[@NOOTSMAZDAS]

I def prefer the old school approach really satisfying

[@MrDazza72]

Hello Charlie , Great video as always keep them coming we really do appreciate your efforts. What is the model of your sig gen? A siglent by the looks.

[@CharlieMorrisZL2CTM]

Hi Darren. Thanks for the feedback. It the Siglent SDG 1032X. It works well for me.

[@BOBRAPHTONEAFWATA]

@Charlie Morris , Wonderful setup ,I really enjoy your videos and impressive design . Do you have schematics in pdf so i can try and replicate too ?

[@ak2b]

Not only is this a good looking radio it also looks like it would be fun to use. Nice job! Tom ak2b

[@CharlieMorrisZL2CTM]

Thanks Tom. I had it on air again last night and I am very happy with it. The new code is working very well, less noise and birdies.

[@وهابالربيعي]

Hi another great video, thank you very much .... but I think at SSB the Bfo = Fop + Cf - 2400/2 - 300 and the Vfo= Cf + Fop , another thing to mention about cw from compatibility point it is usually an lsb signal and the screen show the carrier freq. not the tone freq. I think that will eliminate some confusion at some point when working some stations on cw .... keep the good work and looking forward for the next video

[@CharlieMorrisZL2CTM]

Thanks for the input. My approach is to have the display show the actual CW freq. I will adjust the TX software to ensure my CW signal goes out on exactly the same freq. I did that for the tramping CW rig and it worked well. Thanks again and 73.

[@M0XXQ]

Hey Charlie, another great video cheers - I lashed up some software to do the Transformer calculations just to simplify the repetitive calculations and I was wondering if you'd like a copy to have a play around with and see if you can break it, just before I release it to the wiser world. Cheers Rob M0XXQ

[@CharlieMorrisZL2CTM]

Sure thing Robert. It's especially useful when you are making sure the XL is > 4-5x RL.

[@M0XXQ]

@@CharlieMorrisZL2CTM cool beans, do you have an email address I can send details to please Charlie?

[@technishn]

Looking good. Can't quite see in the video but the SI5351 outputs should be AC coupled.

[@CharlieMorrisZL2CTM]

Hi Kevin. I have used both AC and DC coupling with the SBL-1, ADE-1 and TUF-3. I fond both work equally as well.

[@technishn]

@@CharlieMorrisZL2CTM If running into a high resistance load DC coupling is OK, but with low resistance loads DC current is shunted towards the low resistance path via the Si5351 internals. A small improvement in Phase Noise gained. See QRPlabs phase noise article

[@yesfull]

Hello Mr. Charlie my from Indonesia, i like your homebrew, and goodluck

[@CharlieMorrisZL2CTM]

Thanks for the feedback.

[@grahamhay9330]

Charlie, Could you please identify the black stubby item attached to the Siglent AWG used for the CW test. I should like to get one to use with my own SDG 1032X for the same purpose. Graham, ZL1GH

[@CharlieMorrisZL2CTM]

Hi Graham. It's just a stock standard 'rubber ducky' antenna. It works well. It also bends nicely if you accidently knock it.

[@chrisherd991]

Hi Charlie is there any reason why you chose two crystal filers instead of one filter where you use variactor diodes to vary the filter bandwidth?

[@CharlieMorrisZL2CTM]

No Chris. I did have a think about using varacter diodes, but elected to have two filters. I wasn't sure if I would still have to have two different terminating resistances to get the right passbands. I really should give it a go as an experiment.

[@chrisherd991]

If you look at the circuit of the Elecraft KX1 it is done there. This radio is not just CW on the RX side hence the variable B/W filter.

[@jamesmartin6713]

Nice project.

[@CharlieMorrisZL2CTM]

Thanks. I'm enjoying it.

[@marklowe7431]

This is the way.

[@thevintageaudiolife]

Thank you for the information!

[@CharlieMorrisZL2CTM]

My pleasure. I hope it was useful.

[@richonguzman]

Hi Charlie, I've seen some of your videos and after looking at another QRP (based on Arduino) I got the NEEEEEED to build also one for myself (I have experience building and programming arduinos, esp32, raspberry and also tube amplifiers and guitar stomp boxes) but I don't now where to get info on schematics and their BOM to start. could you help me by pointing for what to look and study?

[@egeotomasyon]

Hi, would you eventually consider putting all these parts on a single PCB?

[@CharlieMorrisZL2CTM]

Probably not. I like the modular approach and having the rig all open. Each to their own.

[@brianharper9798]

I also like the modular approach, say if you want to maybe try a different IF amp or something, it just makes it so easy to just swap it and try.

[@corkystephan5073]

Can it be rigged up for 11meter band?

[@rosscammisola335]

Hi Charlie is this work of Art on your web site with circuit diagram and program for PLL would like to make the Transceiver Thanks Ross GB

[@adrianviera2256]

Muy bueno

[@Nursallim]

Welcome to home brew

[@HobbyIdeasEVA]

Good job!!!!

[@LifeBlogNB]

Can you please publicate scheme? or upload google disk

[@CharlieMorrisZL2CTM]

Yes, everything is up on the blog at: zl2ctm.blogspot.com/

[@dare-er7sw]

Would like to share a ckt idea. Mail?

[@CharlieMorrisZL2CTM]

It's all on the blog at: zl2ctm.blogspot.com/

[@UpinkProduction]

I love it good 👍

[@CharlieMorrisZL2CTM]

I'm glad you like it

[@romanpiskun9370]

🙋👍

[@ИванИванов-о2е7н]

make a usdx sdr on an arduino mini

[@agustiana1247]

Good

[@frequencywatchers]

Send This radio To Me Please !

[@jorgeomar8795]

*MUCHOS CIRCUITOS,ESQUEMAS,PLANOS,Y EXPLICACIONES,PERO EN 30 MINUTOS DE VIDEO,NO FUISTE CAPAZ DE HACERNOS ESCUCHAR COMO FUNCIONA?????* *INEPTO!!!!*

[@jorgeomar8795]

E

[@Theineluctable_SOME_CANT]

Very cool... RF is tricky

[@CharlieMorrisZL2CTM]

Thanks. I enjoy it.

[@TeknikElektronika23]

Saya juga pencinta oprek radio suka dengan orang luar negri alat alatnya lengkap semua.tapi saya kadang nonton youtubnya Marconi Poncol Disitu membahas Radio Ombrow AM PWM dan buka chanel Bank Canare Ombrow disitu belajar Fm/Am dan perakitan TX RX.Salam radio master