Introduction to DMR (Digital Mobile Radio) Presentation - Ham Radio Q&A

I recently did a presentation at a local amateur radio club about DMR or Digital Mobile Radio. They were looking at various digital modes and felt that I was an expert on the subject. While I’m not quite sure about that, I did do a few videos on getting started with DMR, so I must know something.
So this presentation on DMR was recorded on Wednesday March 13 at the Vilas County Amateur Radio club in Eagle River WI. The video is slightly edited for time and content. Please feel free to use it at your own ham radio club meeting if you are looking for an introduction to DMR as a topic
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#DMR
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#WhyDMR

[@TheBroadcastNinja]

Thanks for a great talk! I'm back into the hobby after about 26 years away, so for me it's a bit like I've walked into a time warp, I've gone from 1K2 Packet radio into DMR, Fusion, D Star...and a whole humble of other modes too...I'm slowly picking up new bits of info and you've now added to that journey, so thank you ::)

[@k5hrv605]

Thank you! My first DMR radio is on order (TYT MD-UV390 GPS) and this was a great tutorial to get me started once it arrives.

[@arthurdent8091]

Great lecture. Thanks for putting in all the time and hard work.

[@patazertyui]

Thank you for this interesting intro to DMR, I learned a lot!

[@pegballou9629]

Thank you. I'm new on the search. Appreciate your presentation.

[@N4EJM]

Another great video sir. Thanks for the introduction of DMR.

[@donaldsmith3048]

Thank You for the Information I just got my license and ordered a DMR hand held. Your information will help me

[@Gravel_Rat78]

You answered all my questions I was having while considering getting into DMR. I’ve had my license less than a year, got my Tech in January 2020. And my General in May of 2020. Since then I have been using my privileges mostly on the 2m bands talking semi-local on a linked repeater system. I am building up a QRP kit and want to upgrade from my Baofeng UV5R to something better. In my HT research I cam a crossed the AnyTone HTs with DMR and APRS capabilities. While I know DMR isn’t going to work for me on the QRP side of things it would help me communicate with other members of my off road adventure community as we have a global room on DMR. Thank you Michal for yet another great presentation. As always I learned a lot. I am very glad you take the time to put together videos like this one KJ7MFV Mike Rose

[@arlo12345678910]

Appreciate the video and your time. Learned a ton. Keep em coming.

[@edfry4935]

Thanks very much for the presentation. I am studying for the General Class License after almost 50 years as a Tech so your information is most welcome to me.

[@daveycrockett9447]

Guy is absolutely right- you can do cross mode repeat from one digital modes to another on PiStar, open spot, etc. Amazing pres!!!!

[@garyn3040]

I'm about 25 years behind also now retired and just getting back into the hobby. talk about stepping through the Twilight zone I have a lot of catching up to do Thank you for the great talk. Gary from VE3 land.

[@mark56usa]

Thanks for the clear, concise introduction.

[@daveN2MXX]

Great presentation- I've been a ham for 30 yrs and I just started exploring DMR

[@johnsaunders8315]

Thanks, Michael. A very clear explanation of DMR and the digital scene.

[@drewbacca1662]

Great information. Thanks for sharing, I learned a lot.

[@palzetta242]

New to Amateur Radio, and this presentation to DMR help me understand what I am getting into. I just want a plan radio with a antenna. However, i was advised to go for the DMR. I'll see when a friend gives me a radio that he no longer uses. Thanks for the presentation.

[@dougsbrat]

Thanks for the video I have been using DMR for 5 years now and its my preferred mode for now. DMR is growing, evolving and expanding daily it seams like (128,238 users at this moment), so its hard to present up to the minute info. ie Brandmeister is not the latest Network, there are others as we speak on air and being configured and coded with their own features. some hot spots are pre built (pay and play), others are build using various components, but all are updated often, many times adding new features. That IS what makes it Ham Radio

[@johngriswold]

Thank you! You present trustworthy information in a balanced manner. I appreciate that.

[@Airfix21]

Another good presentation, Making clear DMR

[@kp4wr]

Thank you for the presentation. Been an old Ham Radio Operator and living. under an HOA thanks to you I will try this new mode and change the way of doing radio. 73's de KP4WR

[@popscottma]

Thank you! Keep it up 2 years late on this one but appreciate your content!

[@jolebole-yt]

Great presentation on DMR. Looks like a product thats still needs some adoption and room for improvement. You caught me off guard with the term “Balkanization” lol. I did not know that word was a thing. I’ll just add that the divide on the Balkans was heavily heavily influenced and planed from the western countries since the early 1900s. People liked each other, but the politicians were always the ones who were trying to split the people apart. Mostly on religious grounds. I used to live there till the early 2000s Now I’m in the US on my Ham Radio with your J-Pole antenna! Thanks for sharing! 73!

[@chipcantley7359]

Thanks for the great info. Very helpful.

[@ado75]

Thanks for this Mike, 73

[@jamesa8162]

I think it would be great for the hobby. Yes it is a hobby and folks should remember that. We enjoy radios and talking to people all over. This will attract and keep more people in this hobby by opening up more HF. The generals will still have their own area to play.

[@chonmanriquez6045]

Thanks Mike keep up the good work 👍👌

[@jdp1956]

Thank you for the very informative DMR video and presentation. 73 de WA4ONV, Miami Florida.

[@1vester1]

good info got a sleeping 147.08 in texas .. looking to upgrade at options to wake it back up nice info. Worked with p25 sys 10 years ago talking about bringing back old memories.. Thanks KD5RCH

[@Radiobell27]

Very good presentation

[@michaelmurphy2211]

Nice orientation on DMR.

[@alvarogaitan2529]

Great presentation good job

[@buzzsah]

I have been off the air from1982 - 2016, April 2016 my wife bought me a FT1200, and FT400 so I could start up again. Within the first few months I realized things have changed and being an Advance I felt like a Novice, then I heard of DMR, great more confusion. I bought a TYT390w/GPS and lucky for me a friend and operator had a plug and programmed my tyt. Well here I am in 2019 maybe been on the radio an hour per year trying to catch up on 34 years of technology. I find the DMR is not ham radio, there is no challenge for contact, I never got involved in contest for headcount. I enjoyed contact and just some BS'ing with others, and always trying new ways to better my system. That is what ham radio was about. Good vid.

[@drinaz4070]

Good presentation, thanks. Yes, most Hotspots will cross-mode digital formats if so configured. For example, I use my Yaesu C4FM h/t and an openSPOT2 to talk to DMR talkgroups.

[@KB9VBRAntennas]

Yep, I learned something that day.

[@mark12.31]

Yeah, the neatest thing about those hotspots is how some (many?) of them now will do like the gentleman said - come with in a YSF radio and be transmitting into a DMR talkgroup, as setup in the Pi-Star configuration page. Just enable the YSF to DMR mode and away you go. This may not be true for all of the hotspots but many of them now do this. Check it out!

[@MrWhaatay]

Let's say I have my radio set on a repeater channel and the code plug for that channel is set for time slot 2 with the static talk group of 31540. Then someone comes along and changes the talk group to a dynamic one of 31513 and starts talking. I decide I want to talk on the static group of 31540 and I put a call, but because I don't have my radio programmed for that dynamic group of 31513 I never hear that time slot 2 is in use so I cause interference with those using time slot 2. How do I prevent that problem from happening if my radio doesn't have promiscuous mode and that dynamic talk group isn't in a receive group because I am unaware of what dynamic talk groups the repeater admin allows?

[@la5984]

Where can I find code plugs for my ailunce hd1 Ad6up not easy for me

[@1crazynordlander]

Thanks! I am a new ham and an old man. I bought the Ailunce HD1 GPS radio. I see you have a video on setting this radio up with the usb cable that comes with the radio. Can FM repeaters be setup with this software? I am kinda catching on. The only reason I got this radio is because it was on sale on Amazon last week so I bought it on a whim. Maybe sorry I did. There is a repeater in a town I frequent so not all is lost. If you can please help me by having more videos that will help me get going on using DMR. My mobile is a Yeasu FTM-100DR system fusion radio. Looking into a hotspot for my house.

[@joeddejohn]

Nice presentation. Thank you. That would be awesome to see a video on Balkanization.

[@charleschampion871]

Great presentation. I have heard some say they think that you need a digital id for each owned transceiver in digital. You clarified that! One id for one amateur radio operator makes much more sense.

[@StuartGorsky]

One ID for all your radios. It doesn't matter if you are on a mobile, base, HT... You are you. I am one of the original DMR subscribers from the very early days of DMR-MARC net and at that time they gave multiple ID's, portable 1, 2 and mobile. Over the years it just caused confusion and it was a waste of resources. One ID, multiple radios... Bye the way, If you lend your radio to another ham, they will have to ID themselves when broadcasting.

[@panplayer]

This was a great explanation of DMR. I’m currently thinking about replacing my first HT, the UV5R, and either going with a DMR (like an 878), or just getting a good all around analog like the Yaesu VX6R.

[@derrickhouska4935]

Thanks you for the presentation. Appreciate the PPT screens, as it let me screen copy so I can start a binder to have in the shack. I need to review new stuff a couple times. Looking at the Alinco DJ-MD5t or AT-D878UV. Hadn't heard of Hyerta, so will research that.

[@lenperkins5724]

Derrick Houska Alinco is good and very similar but no mobile now. Anytone has both HT and mobile.

[@gooberminther3tik25]

Could you move the table top monitor closer to the camera. Abundant hand animation usurped screenshots of monitor viewing.

[@gonehomewoodsman9059]

Ty for the video!!!

[@masenjohn6452]

Thanks. Very informative. 73s

[@alvarogaitan2529]

thanks for you orientation good job thanks very good job

[@k9wlwradio309]

Although DMR is complex, it is because of the business radio design mindset in the radios. Anytone is starting to make strides in making the radios more amateur radio friendly. In fact, with the 878 tweaked slightly, you can access and hear any talkgroup from a hotspot with only one channel programmed and absolutely zero talkgroups programmed. All it takes is to change the radio to full Promiscuous mode, unlock the manual dial a random talkgroup feature with the online software, and you can QSY to ANY talkgroup instantly. Add to that the easy method of adding talkgroups quickly in the radio menu, there is really no need to use a codeplug at all using these methods. The result is virtually unlimited talkgroups. The question is, can Icom, Kenwood, or Yaesu put some skin in the game with DMR? Already Icom and Kenwood make VHF and UHF commercial radios with DMR. I enjoyed the presentation and think you have a very interesting channel. I am definitely adding your channel to my subscriptions!

[@johnnylifeson]

Great Videos !!

[@philcremer4709]

Don't you love it when experts are in the audience of a "introduction classes"?

[@slavkochepasov8134]

TDMA in DRM is strikingly similar to TDMA in Ethernet (time sharing access to physical media) that been used for decades! :)

[@ScientistPrepper]

Couple videos on dmr?? Yep definitely an expert on it in my opinion! Thank you.

[@ravichandransrinivasan5453]

Hi Michael, IF two hams want to communicate, do they have to know each others preferred mode beforehand?

[@furonwarrior]

So... is it kind of like a cellular but with a ham radio twist?

[@richardadams9039]

Still in a mystery - which radio am I looking at, the MotoTRBO VHF or UHF model? Frequency didn't seem to be part of the discussion.

[@StuartGorsky]

Most all existing repeaters are on UHF but with the advent of less expensive dual band HT"s the VHF repeater will gain in popularity. For the money the Alinco DJ-MD5 is the best radio for the money. I have the Anytone and its a good radio but the Alinco is just as good (for most hams) and much cheaper. I got mine for just a bit over $140. Be advised all of these radios are single receive so if you show two channels at a time you will only hear one channel at a time so that is really bad for Emergency Communications. The Alinco makes it easy to hide the second channel for times when simplicity is required such as using the radio for handouts. Yes you can do that on the Anytone but the price compared to the Alinco is not worth it.

[@shandybrandy5407]

Hi Michael, this was indeed an incredible presentation which helped me a lot to break the ice on DMR radios. I am scouting for one and just wanted to know if the Alinco DJMD5 (GPS version) is good or any other DMR which you have in mind to suggest. Also a suggestion for a portable and slim Hotspot device which would be easy to carry while traveling. Always appreciate your hard work videos which are often loaded with knowledge on ham radio and easy to understand. Greetings from Bangalore, India. VU2TQT 73s

[@jamesweisbeck2966]

n talkgroups and on radio ids = why do some have letter i on them? = i525 etc

[@CharlesKrueger]

Great content and appreciate your consistent sharing. I picked up an Anytone AT-U878UV DMR radio both because it was a DMR which I would like to learn and understand as well as the APRS functions it carries. Right now i feel like I am in over my head and am getting lost with both the APRS and DMR aspects of this radio and while I think I am configuring correctly, can’t get a test back to prove it and if it isn’t correct, don’t even know how to troubleshoot it. I guess this might be a plea for help. While I will continue to browse the content you and others have here on KZbin, do you have any recommendations for someone like myself just getting started in this? - - 73, W9CTR.

[@scotthartman8390]

Did you ever end up getting more information or solid websites or tutorials anywhere? I bought the AT U878 UV II Plus and I'm on a repeater nearby (so similar to you probably), --- I'm just lost beyond belief. There's no really great tutorials online either to understand any of this stuff. I'm trying on Ana, I'm trying on Dig... then there are A+D or D+A (not sure if it's the same for the ATU878 you have)... I'm in a talk-group, thinking it should be Dig chantype.... no one's responding... I have the color code set to 1 and pressed the PTT button, I even tried 2.......... and here I BARELY understand the Analog portion of this device, and what stinks is I just did something so now it won't show VFO for me to change the frequency, even though it says I'm on Analog (I thought I could just type in the frequency if it's in Analog channel type, but it's stuck in this Channel and talk-groups... I thought that was only on Digital?? Maybe it's getting confused... I'm a hot mess.) I tried turning on and off again. *sigh* ---- I know... one thing at a time... patience, patience, but it's all overwhelming. Any great sites you found over the last couple years since your post would be well appreciated when you get a moment!!!! :-) - 73, KE8UQL.

[@cwilliams6884]

@@scotthartman8390 bro just set up a parrot channel so you don't need anyone to talk back to see if its working. further... what's the point of using this mode if no one is on it anyway

[@scotthartman8390]

@@cwilliams6884I can't get parrot to work. LOL *shrugs* Must be something very minute in the settings that I don't have configured properly. Also, repeater only allows a very short list of TGs to work out of all the thousand-plus TGs that the AT-HT has programmed in there. At least now I'm not getting "Repater Not Found!" because my dumb butt went and used the wrong frequency altogether! I was using the default from the codeplug I bought and discovered "Oh, it's out of Missouri! That's why you can't get the repeater, you dum-dum!!!" (Makes sense, my hometown made the Dum-Dum suckers..... and I am living proof!!!!! aye aye aye...... *sigh*)

[@alanh1578]

Retevis RT3 does allow TG change on teh fly with teh advanced firmware. Motorola does allow if you have the CPS programmed with all the TG's you want tyo use as a contact........Easy Peasy

[@dickpaul3083]

Been a ham since 59. Sounds interesting. Something like running the 1st FM repeater in Chicago... And those Teletype machines.....wow.

[@davidkeith663]

Hi Michael. I loved the presentation. I am new to dmr and have a Retevis RT3S. I was wondering which hot spot to buy. I see so many different ones at all different prices which is confusing to me. Which hot spot do you use? I was hoping to spend around $100 to $150 on one. Any suggestions would be appreciated. By the way, I purchased one of your 222mhz Jpoles about a year ago and love it! Great antenna!

[@superserial1]

You can get a fully built hotspot for $90 all day long on eBay. Cheaper if you want to build one. I have an original open spot and a rugged spot. Love them both, although they are a bit more than your price range. Good luck.

[@stevejones8665]

I Would recommend you get an MMDVM Hotspot PCB from China and use it with a Raspberry pie running PiStar Software this would let us try all the modes. I have just received my DuelMMDVM from China and can't wait to get it up and running If you are within Range of a DMR repeater then you don't really need a Hotspot. Good Luck.

[@uiv2323]

Thanks sir

[@christopherwaldron8139]

Being a truck driver and not always in a good spot for a repeater do you absolutely need a repeater or can it be done thru a hotspot device?

[@johnbeatty7319]

A hotspot (many) can be configured to work with your DMR radio and your cellphone’s data plan capability. I hear many hams on DMR conversations traveling using this setup.

[@KB9VBRAntennas]

Some hams, especially in areas that may not be served by a DMR repeater, are using a hotspot on a MIFI link. As the other commenter said, it depends on if your phone's data plan will support that use, but would be an excellent option for the over the road driver.

[@PerryChamberlain]

Yes

[@superserial1]

If you’re a long haul trucker, a hotspot would be necessary imo. Doesn’t matter where you are. As long as you can get internet/data, you can talk to anywhere in the world that has dmr capability. I have a hotspot specifically for traveling, so I never have to program the radio when out of town.

[@evakidwell8043]

how would i get ufo moldof my raduo

[@Jacob-mm8xq]

what kinds f license do you need for family and camping to use DMR

[@superserial1]

Dmr ham requires a technician license.

[@tlm1075]

Can you use a MMDVM with the Dmr marc system if so how?

[@dougsbrat]

DMR MARC hates hot spots! but they can be used if configured at the C Bridge the Repeater uses

[@nathanbieber2840]

DMR is quite brilliant! sounds like it came from wifi .. no? sounds like the same concept of having multiple devices doing different web-based things at the same time from one router, one 2.6Ghz freq

[@hobojon44]

I can go dmr dstar or fusion but there is . allways some one on HF

[@500gwr]

As always your video was not only informative, but also entertaining. I noticed a world chart (Yaesu) behind you. Do you you know of a source for a similar DMR chart? I have to give a DMR demonstration for this years Scout Jota-Jopti and I'm looking for training aides. KI5OTT

[@jamescarroll6954]

Good overview, Michael. I have a new dmr radio. Any suggestions for Wisconsin talkgroups of talkgroups of interest here in WI? I live in the SW part of the State. Thanks. Jim K9JEC.

[@KB9VBRAntennas]

The Wisconsin DMR talkgroup 3155 has a fair bit of use. I usually monitor it off and on.

[@jamescarroll6954]

@@KB9VBRAntennas thank you, Michael. I will include that in the list I am putting into my codeplug.

[@denisbordeleau3796]

Great video Mike thank you 73. VE2LDB

[@neilspector9221]

Looks like early cell phone technology to me. So is it even ham radio anymore?

[@inmyopinion_3672]

No.

[@j69chevelle]

What is the modulation scheme? Some form of pulsed PSK?

[@KB9VBRAntennas]

DMR uses a 4 state FSK or Frequency Shift Keying to give a baud rate of 9600 bps in a 12.5 kHz channel. The channel is divided into two time slots using TDMA or Time Division Multiple Access so two conversations can happen simultaneously.

[@robertmitchum2972]

Well done! You’ve taken something that seems very complicated and confusing and broken it down to simple and easy to understand...... Nothing really to it, once you grab the basic concept.

[@todop]

Why dstar failed? I wonder no one seems to have an answer. I have somerhing in my mind that in the begining they wanted to be a monopoly and also they branded the name and sued someone maybe. Later they stopped but it was too late

[@n1kkri]

Do you see in the future Hams with software experience modifying the firmware of DMR radios along with the programing software to make it more compatible or easier to use with Ham Radio.? I see some of this happening with a GD-77 HT. Quite a group of followers doing mods, hacks etc, for that HT.

[@rfi-cryptolab4251]

There have been firmware mods already for some chinese radios (Tyt MD380 for example). The programming is simple already for most uses. Setting up a radio that has roaming capability is a little more complex.

[@SirBeauJangles]

No, can't agree that the 3 main digivoice modes sound pretty much the same. Fusion is clearest, sounds better than the other two. But uses more bandwidth. DStar seems more prone to r2d2 effects. DMR is impenetrable to startup hams, with its unfamiliar terms that have no equivalents in ham radio. Coding "codeplugs" by manufacturer's software isn't too bad once you've been shown a couple times some basics but initially the program designers made zero effort to render their software even slightly friendly.... (In my opinion, Icom didn't try much more with their DStar coding software) Then there's the whole different business of using personal "hotspots" to get an entry point into the DMR network via the Internet. It's certainly less like ham radio than it is like using a phone in that the element of chance is removed. Contacts, once the basics are understood, become routine. Even hyperlong distance contacts. Like DStar. I had a contact some time ago with a S. Korean guy near Seoul using my Icom handset. And we could have arranged a sked next evening if we'd wished, and if no one else was occupying the route it'd have worked. On me, the effect was to make routine a contact that - had it been radio-to-radio via HF, I'd have been jumping up'n down for a fortnight having cracked a difficult multi thousand mile pathway but as it was, this was routed via the Internet, effectively connected like phones. Which for me removed the wonder of such contacts. It's just too easy, once the luck-factor has been removed. Yes, it has its place. But for me can never ever come close to replacing rig-to-rig contacts. BUT. it's also possible to use these radios simplex, with nothing but air connecting the antennas. This works extremely well. As an FM signal gets progressively noisier as the threshold of loss approaches, noise gets intrusive. Some simplex trials have shown that both DMR and DStar improve this situation markedly, until the audio disappears from perfect to total loss with no degradation in between.. But there are few users who capitalise on this, to my surprise. It's as though the operators' minds are channeled into considering only repeater/reflector/hotspot pathways. Low power transmissions using these digital modes can keep contacts viable after a similarly weak FM transmission would have been abandoned as too noisy to follow.

[@stephenwilliams5201]

New to tec / not. used to work a mux van in the army. Just called (time division multiplex,) 12, 24, or 36 chanel's of audio. On one line The van was parked on the back of a duce and a half truck. Now the whole mess is shrinking to a small package. Wife gone. Kids on there way. now back for a second helping. Tks for boost. In to. the future. Retired sgt williams. 73

[@luish19779]

Yeah, I got a Chinese DMR radio- But I got bunch American Radios 😉

[@ManuelPinner]

Just got a Alinco DJ-MD5X, like the Quality of the Japanese Brands!

[@sklise1]

lol; kick a cat!! love it!

[@k7rex]

I wouldn't call it "Balkanization", a better term would be "Tribalism", something we as a country are very good at. There are those that feel that whatever their chosen digital voice mode is, that is the only one to use, which of course is total BS, but how some choose to operate. That said, we now have multi-mode XLX reflectors popping up all over where the three major Digital Voice modes are bridged together so that we can all talk to each other. Just like with HF, you may need to jump around to find what you want, but it is out there and it keeps getting better.

[@stevemussman4119]

MANY THANKS WANTED TO KNOW ABOUT DMR - GREAT JOB KB9VBR, STEVE K2SM.

[@rayrutherford7821]

Why d r?

[@NIGHTOWL-jf9zt]

Great video and presentation, but "I" just don't get it. "I" am one of those people who need "HANDS" on to learn this stuff. I always do better if I can hold a piece of equipment and actually work it in order to understand how it works. I have been interested in DMR for a while but there is literally no one near me willing to let me have hands on. So for now it's still Echolink and cell. LOL

[@rfi-cryptolab4251]

I'm not a radio operator, but I'm very familiar with DMR. These amateur linked repeaters are way to clogged up. They have multiple talkgroups assigned to the same time slot on one frequency, example TG 1 TS:1 Local TG 2 TS:2 Statewide TG 3 TS:1 Event TG 4 TS:2 Worldwide This just results in bonked calls. It was so bad a once popular DMR repeater by me is hardly used anymore.

[@KB9VBRAntennas]

I know what you mean. Repeater owners need to drop linked talk groups after 15 minutes of local inactivity. Many don't and not only does it cause trouble on the local side, but messes up the links too.

[@rrpilot]

Eagle River!

[@justina208]

LOL

[@fieldlab4]

I think the term you are looking for is multiplexing

[@ttciradio]

Check out our online store for DMR radios and hotspots ttci radio solutions

[@richfoster4189]

So, right in that 1420-1430 portion of the vid, I think he is not correct. Let me caveat this with, if it's codec-2 then you need to verify what your specific DMR model is doing with codec2. "D-STAR and System Fusion (and some implementations of CODEC-2) all digitally encode a station’s call sign as part of the protocol, so their transmissions should meet the legal requirement.", as seen in FCC Rule 97.119 (b) (3). It also notes that a verbal call-out of callsign is for courtesy only. I do not believe there is any "station" vs "operator" distinction for mobile radios, and although a "station" has clear definition of what a "station" is, this Rule section still applies to "operator" that does not have a "station" callsign, because using Dstar/Fusion/codec2 is not unique to just "station" transmissions. And, please verify, some DMR's won't key out if they do not have an entry for callsign.

[@tapiomakinen]

I am sorry, but this was not very comprehensive to me. If you give an introduction to an acronym by defining it by several other acronyms, that you forgot to look up, it will just be another video of acronym soup. I am new to ham radio, and I have encountered over 800 acronyms so far. Sometimes I wonder whether some presentation are made to impress one's own peers or to educate the less informed.

[@leonbernhardt8818]

That nerd up front pulled you right into the weeds, it's sad.

[@PerryChamberlain]

Great presentation, but why did you place the flag in front of you monitor. It blocks a little of the presentation, and is very distracting. Next time move the flag please, unless your talk is about flags. Also place camera higher please .

[@norrinradd8952]

Not only was the flag not in front of the presentation (there is an obvious gap between the two) he showed each slide full screen, completely unobstructed. You may have been attempting some constructive criticism, but instead you gave us a list of things that annoy you. At least wait until someone asks for your pet peeves before you share.

[@gliderrider]

What a mess!

[@jamesbetteley5860]

Ok presentation. You lost me at “Made In China.”

[@AbsolutionArmament]

Most of the individual parts that make moderen radios come from China. Just final assembly in Japan, US, Taiwan. Heck the first company to do a dual band dmr/analog HT was a Chinese company and others followed after that. Edit: and I'm not just saying a few parts I mean like the total boards are usually made and soldered in China. Then just some final touches and qc in another country.

[@cwilliams6884]

dmr has to be one of the most pointless things i've ever heard of in my life

[@KB9VBRAntennas]

You came here just to say that? Bless your heart.

[@cwilliams6884]

@@KB9VBRAntennas discord is free my guy

[@deislanddave]

Not a good speaker, errors in fact. If you are going to speak you need to be better prepared.

[@KB9VBRAntennas]

Please feel free to elaborate. I'd love to know so I can make the appropriate corrections

[@deislanddave]

@@KB9VBRAntennas The intro was pretty good. Raised my hopes. Lot's of "um's," "uh's" and other stumbles. Too many acronyms and components you didn't have in hand. Hand motions are distracting and make you look uncertain. You correctly said TDMA is not a modulation and then you later said it was a modulation (it isn't). You seem to use your notes as a crutch as opposed to a reference. You might be happier with a confidence monitor. You overuse the word "efficient." Some elements (like dealing with errors) are better described as "robust" since in fact ARQ is NOT efficient. That's as far as I got first time, about minute 6. Your attitude in response to my comment was good so I'm running through again. I'm multitasking here, so I may miss some things. It would help to talk in one slide about modulations (FM, PSK, etc.) and modes (TDMA, CDMA). No numbers on the slides so reference is hard. The WFM, NBFM, TDMA discussion was confused, in part because your approach to modulation and mode was unclear. Consider that your audiences may have both novices and well-informed people - you need to address all. Terminology is supplemental, not different. Good to talk about cons as well as pros. It is good to be looking at your entire audience. Your scan rate looks like you're having a seizure (sorry). You could do better with similes and analogies. IDs are like IP numbers, talk groups are like email lists or SMS groups, .... You did a good job relating color code to CTCSS. You regularly confused frequencies, channels, and talk groups. By the time I got to minute 23 I wanted to handcuff your hands behind your back. Camera height really needs to be higher. Time management is always a challenge when speaking. You have bursts of speaking too fast and then ramble. 20ish minutes of information in 30 minutes. I'd rather have you slow down, spend 40 minutes and provide more information. Step back a level and and think of what you are presenting at the novice, intermediate, and high-tech levels. I recommend this www.amazon.com/DinoFire-Wireless-Presenter-PowerPoint-Presentation/dp/B012FB0VM8 . Put the paper down, use the clicker. Laser pointer and PowerPoint control. $13. I carry two, plus spare batteries. You can write me [e-mail]. I speak often in person and in webinars.

[@KB9VBRAntennas]

Thanks for the comments‚ I wasn't expecting you to get so deep but I do appreciate the time you took to make the analysis. Recording the presentation was an afterthought so I didn't have my full kit with me‚ hence the technical issues with the recording. The other items I'll certainly take to heart in crafting a presentation.

[@shandybrandy5407]

@@KB9VBRAntennas Michael, really appreciate your graceful and positive response to Mr Skolnick's analysis and feedback of your presentation. It was definitely a great learning for me too which, I guess would help me to improve on the flaws I often make during presentations. VU2TQT 73s

[@Lancer971]

🤔👎

[@TRUMP_WAS_RIGHT_ABOUT_EVRYTHNG]

I couldn't make it passed 5:04. Or the 75th uh, um .... I appreciate people making these educational videos but for crying out loud man🤔🤪 Read some books on how to talk to humans you wish to educate. Uh.....over.

[@KB9VBRAntennas]

Thanks for your input. This was a recording of a live presentation, not a TED talk. I'm sorry it didn't meet your standards.