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I just found your channel. Great project! If you still have the video with a detailed walkthrough, I would be very interested. Looking forward to putting this together, de AG5AY.

I have a ton of radio projects coming but this radio is in my to 2 right now. Unless they come out with something to replace the 990.

I prefer the ICOM 7610 because it has Two independent receivers and everything I own is an ICOM. 890S is no slouch but it doesn’t have two receivers.🎙

Brilliant ! Absolute top marks. Best 73 es TU SK ..

Thanks for this video, however my OCD kicked in when you didn't brush away the chip crumbs and rolled the toroid around in it lol.

Is there a video for programing the menory and 6 meter repeaters? If not would love one.

No update?? UPDATE: Oh, you have to read all these comments, then go to his blogspot, then read all those comments to discover that Icom replaced a malfunctioning radio!

Hey Mark! You have the same avatar that I have. Where can I get one in color? I think it's called Grumpy Ham. I have the Kenwood TS-590SG. I'm hoping to be able to afford the TS-890S one of these days. I do some CW contesting and the high rating on the Sherwood Engineering web site makes it even more attractive to me. I see that you have a 6 Meter Beacon. I have a 10 Meter Beacon at 28.243 MHz. 73 Paul AA1SU

It is really a fantastic rig. I hope it will be my new one. TNX for your excellent review.

Great Video. Your material is excellent and very informative. It would be great if you had time to produce more videos.

Lovely idea for a video, I too made Drew's designs in my callow youth. You missed an opportunity to turn them on and demo the differences, that would have made a nostalgic and educational video. Oh well... BTW Drew is on 160m AM weekdays almost without fail in Melbourne, I listen in from time to time.

Nice

it would have been nice if you put the camera focus on the display and not the knobs. oh well, one cant have everything.

Is that really *linear*? I mean, could it be used for SSB, e.g. VARA HF digital modulations? All the MOSFETs suggest it is rather a carrier-only amplifier.

antenna swr 1:2.5 is your problem. nothing wrong with the amp

Hi Mark, Can you scramble this units frequencies via an inbuilt scramble? Thanks

Im not a Ham but its always interested me. Ive seen and heard about this topic but didnt know what it was. Thanks for the video. All the best to you, sir!

Thank you for an excellant introduction to the TS-980...One take-away is CW...My Dad used it but today do we really need it or does it just keep a beautiful history go comms going. Do kids totay see any reason to learn CW ...? Thanks Again!

Thank you! you're my true hero!

But it hasn't a VHF and UHF band. Price above 4800€.

This is a really great video and I am very greatfull you are sharing the Excel spread sheet.

❤. Nice job ❤

Wow! Great illustration of the balun transformation. When at first I saw 3 channels + math oscilloscope traces on the screen, I knew it was going to be good. Sadly, there are too many people who don’t really understand these concepts out in the internet presenting hocus-pocus explanations that further confuse newcomers. I’m going to scan your channel’s video library in the hopes that you’ve dug deeper into the subject. Thanks and 73s!

food mixer people icon ic 7610 better by far

37,04dbm is only a about 5w not 10w. 10w would be 40dbm.

Very cool and I wonder if you can use a vertical cable to pull I and Q from a ethernet stream.

You could always use the RTC in the STM32F103C8 🙂

Any issue with the buck converter creating noise sidebands on the PA by coupling noise? Nice project.

Nice to see I'm not the only person who is organic in their homebrew approach, and "eyeballs" my case drilling for heatsinks! Looks like a useful and fun project 🍻🍺🍺🍻🍺🍺 Cheers and 73 de VK2 AOE

Gotta say....I'm aroused!!! Sexxxyyyyy rig! 73 de VK2AOE...thanks for sharing.

10:35 Did you retrieve the stray wire turning under the screw head? Easier to see on a big TV than in person !!

Changing the gate voltage and thus the idle current of the BS170 push-pull stage solves the harmonic problem. The 3-th harmonic remains rather strong on some band, app. -13dBc

Btw: The explanation of the function of Q202 and Q201 is clear to me. A prerequisite for the used principle is that the 3 bs170's have exactly the same gate voltage to drain current graph, it should be matched trio's for proper operation. The voltage over R206 is 0,7Volt, so Q201 will just start to conduct and pulls the gate voltage to such a value that balance exists in maintaining this be voltage. The current thru R206 is than o,7/33 amp. D201 is for compensating the be voltage of Q201 so all 3 fets have the same gate voltage. If the 3 fets are matchedl the same current flows thru all 3 fets

Hi Mark, i just assembled this amp and found out 2 things. 1st the pus-pull bs170 stage oscillates on 230MHz. Fix: 2 33 pF caps direct over gate and source. Frequency response remains ok from 2-30MHz. 2nd the 1st harmonic is just 13dB below carrier, that is a problem. I encounter 1.8volt on the gates of the bs170's just as you did. Might be the harmonic problem. What is the idle current of these 2 bs170's after you corrected the gate bias voltage? 73, Herman PA0VRE

IMPRESSIVE . . . . envious . . . I want it.

You a nice set up to get FT8 working. You mentioned using macros to setup the radio. We're these macros on the radio or on by your PC?

Thank you Mark very helpful and succinct, no waffle. Ahmet G3PRK

Very useful 73 de Jim G4PFJ

3 bob and a conga??

Very informative video. Thank you.

I've built two of these. The first one fizzled (literally) due to an issue of my own creation. I was much more careful with the second one. Even with that, I still had a hidden solder blob that caused me to cut out the original IFR510's, clean up the traces, and install new MOSFETS. Then I had a hideous ground loop from my cheap signal generator that caused a sustained self oscillation. I built an isolation transformer and replaced my haphazard input/output wire leads with coax, and after all of that, I obtained almost exactly the same results as G0MGX. This is a difficult kit. A careful build by an experienced kit builder can produce a working amp though.

AD8307 is obsolete, I had to twist an arm a while back to get some from another harm's junk box. Wonder what the replacement is...

Hello Mark, how would you compare the performance of the NB of a 7610 wit the one of the 890? How would you compare the 7610 DNR against the 890? How would you compare the 7610 notch (auto and manual) against the 890? I could live with not having a second receiver but not with a too inferior NB, DNR and notch. Your input would greatly be appreciated here. I'm making my mind up on the IC7610 or the TS890. We all know de Kenwood's DNR is not as capable as the DNR of Icom ond Yaesu. The million $ question on the 90 is how outspoken the differences are. Hope to hear drom you. 73 es DX Gust ON6KE

Great video Mark, this is what I'm going to build having run part way through your Microcontroller Knowhow book. I've got a directional coupler coming from Australia with the 8037s onboard. Finally got STMduino working OK on an older version of the Arduino IDE (1.8.19).

😢Same here!

I’ve just bought the Microcontroller Know How book so this video is very useful. I’m not building the directional coupler myself. I’ve ordered one from VK-Amps with the AD8307 on-board. We don’t seem to have a similar company in the UK with modular elements you can buy.

nice video, how can i buy one .. please suggest me a store link. Thank you

Nice Radio 👍

Nice rig...The set up still looks a bit complicated. I used signal link before and had it working for PSK and CW. Unfortunately Windows I believe did a up grade and I lost all of my COMPORTS. I tried for hours to reinstall the software comports. I was using a Yaesu 101D and the software never reinstalled for my logging program or other data. I gave up the challenge for days and went back, regrouped and tried again. Still no luck. I am in the process of selling my home and moving back to Wyoming. I have sold all of my radio gear and have been thinking of starting over with a small station. The TS 890 is no small radio or investment but it should last me the remainder of my ham years. Maybe for me the KISS principal is the best. "Keep It Simple Stupid." LOL. Was wondering if downloading the drivers from Kenwood is any easier than from Yaesu or Icom? I may just use SSB with a dipole and go barefoot. It was a kick to use PSK on less than 10 watts and make contacts all over the world. No amp needed!

Thanks for the excellent overview of the rig. Maybe I am dreaming. But wouldn't it be a neat idea to program the rig using an HTML interface? Like we do with every router today? No need for software that soon will be no longer work due to an outdated OS.