Yaesu FT817 / FT817ND Full TX Modification 

Incredibly useful video. I was going to buy one of these and mod it as a do-everything radio but no way if it won't do marine or FRS.

Awesome info, thanks for the instruction. I hear you about those magnifiers....eyes start going downhill after 40!

Thanks for sharing this information. I have a 817ND and really like the little radio. Not sure if I will mod it or not, but it is nice to know and have the right instructions which I did find the instructions just like what you showed. I was reading thru your comments about the 9:1 unun and 35 feet of wire, I have the same antenna and use it for Parks On The Air (POTA) and it worked great for me. The only difference is I did put a 26 foot counterpoise on it instead of using 20 to 30 feet of coax to the radio. Again great instructional video. Juddie WD8WV

I love this stuff but I'll never do videos on it. I'm terrible at teaching stuff like this. great video. thanks brother

BTW this mod is necessary on older rigs to allow coverage of 60 meters. Good video. Thanks!

Thanks so much for a very useful tutorial 👍.

Hi Julian, thanks for the videos. Can you comment on if you have had problems running with the amp you mentioned with digital and the tuner you mentioned in line? The tuner manual cautions against a full key at that power. I'm assuming you have not ran into any issues. Thanks agn.

Super useful video. Loved it, THANK YOU!!!

Hi - I just did this mod on my FT818Nd and can confirm that it works fine too. Thanks

FT817 and FT817ND will become a Classic/Collectible. It's such a versatile radio for all sorts of situations. It goes well with Tokyo HI Power 45W HF amp. BTW, after you desolder jumper 5, and bridge 1 and 2, be sure to reset your radio by holding down [F]+[V/M] buttons while powering it back on for full TX across all bands.

My mom used to get mad when I opened up or gutted, downsized electrical or electronic things around the house. Haven't received my unit yet and I'm buying wick today. HI mom!

esta modificacion transmite en 11m y en uhf en la banda de los talk about gracias

Thank you! It would be a miracle to have some mod to extend the upper VHF limit.

hi my friend thanks for the video very very good

I tried this modification and my radio will not power up. Am I missing something?

Hello, I just purchased an 817ND with the mod and was curious what it does. I want to thank you since now I have a better understanding of the Mod itself. I was curious as to the bracket around the radio. Who makes it, and do you have a source to get one? Thanks again and 73s! Mike

What are the minus figures after the MHZ figures, is that output power in watts ?

I have a Japanese model 818ND that wont transmit from 146-148Mhz on VHF and 440-450Mhz on UHF. I wonder if this mod will fix that.

Does this work on the 818 ? I saw mod on the web but it didn't state full hf coverage. Thanks

Recognise this is an old video - I have looked into various mods on handhelds as I would love a radio to communicate on UHF, but also occasionally on true AM airband. As a paraglider pilot, generally chatting with ground instructors or other pilots on UHF but if flying cross country through controlled airspace, permission may be required via AM transmission on airband. After this modification to this model, is the TX actually AM, or transmitting FM on those frequencies? (seems like the latter is most likely based on forums). Cheers

Colleague a question how to see the power (Watts) that is configured the FT817? And how can I leave it configured to change like this, for example 144,150 then 144,501 144,152

Hello, and thank you for the video! Damn, did I make a mistake by buying a pure 11 meter band /cb radio (president grant 2 premium) when I also want to be able to RX/TX on HF and VHF portable? This video let me think so, or shall I keep it for portable 11 meter uses and get the FT817ND used on ebay for the bands without doing the modification you are describing here? I've read that it is maybe not good for the device to use it on non ham bands. *sigh*

Can i use a LAN CABLE (8pin) to connect MIC to TRX instead of the official cable that was broken?

Anything above -125dBm, is a good receiver for practical purposes. The S meter is not a good indicator, as the receiver received well below the S meter action. If I have RX issues on UHF, I can install a GaAsFET amplifier. Low noise figure brings the useable signal down to -125 dBm with ease.

Hi my friend can you share the documents to this modification? Regds

Excelente video eu tenho um igual o seu, pode me dizer qual o ano de fabricação? Comprei usado e estou curioso pra saber a idade dele. Grato

looks like FT817 can't go over 154MHz with or without the mod, am I correct?

well now that we have 818 is it going to be the same procedure on it or not known yet?

Which technique did you use to split jumper #5?

I only want Hf opened tx. Would this make my auto repeater offset go away? Anyone know?

I can't seem to find a conclusive answer on the web. Does the FT-818nd transmit on the CB bands. In other words, is it a nice radio to start out on free CB bands and then move up to a licence?

Does this work on the FT-818? & it will work on 11 meters?

Hi. I have a 1 question. Working this mod on new FT-818ND? Thx for answer. :-) Have a nice day.

Thanks.

Do you happen to know if there is a method to expand the freq range on VHF to 174MHz?

After modification radio lost the ARS function. Is there any fix to enable ARS function again?

I went looking for the document you mentioned but can’t find it… do you have a link? 🙏🏻

I was really hoping after a mod this radio could do it all... all commonly used HF,VHF and UHF, disappointing that it will not do marine band.

Will this mod allow for Tx in the 1.25m band?

i have a beofeng (if thats how its spelled lol) its a hand held can you do a video on that? i brought it thinking the BIG BLACK OUT was coming but i've had no luck with it. comms is not my strong suit but i would like to at least learn how to contact somebody if ever needed. pls help thanks. p.s i could even send it to you if needed.

The Hi Q of the chebyshev filters will not allow much in the way of frequency excursions. Radios that can transmit on very wide swaths of spectrum ( like the old baofengs) could do so because they really haven't got the filters that make them clean. There are limits to the band width of the ferrite transformers used in the transmitters, which is the other issue. Its easy to make a pretty wide band transistor linear HF amp if you don't care if it is clean. Cheap cb bricks are the classic example of filthy amplifiers with no filters. Class C (fm) amplifiers same deal when they are broad band. One might by-pass the filters in the low and hi band vhf sections and achieve some boafeng like tx.. but how shitty would t be.? shitty enough to be illegal and grungy. unless you want to own grunge generator... whats the point ? In an emergency, when other wise illegal operation is sometimes tolerated for a moment... it would be swell f the 817 had the ability to communicate with aircraft. No single change would be more useful. But it simply aint possible. During flood or earthquake.. its the one capability we'd like. The RX in the aircraft band is swell though.

Will this mod open the CB frequencies ?

Hi. I tried this with my new Yeasu FT-818nd (2021). I reset the CPU but I´m still not able to TX 11 meters

After this mod. Will this Tx/Rx at 478.400 up to 479.000 ?

ould you publish the link for the mods? thank you

Good video thanks. KI5UHA

can you do it on ft 857?

i did this and i can not tx on 70cm

We can't TX more high than 154 ?

oh and by the way im first one to comment lol its my first time ever lol

YOU DO THAT A T Y O U R O W N RISK REMEMBER THAT! IF FCC SEES THIS YOU'LL HANG AND WOULD MOST CERTAINLY WILL BE PROSECUTED A T THE FULL EXTENT OF THE LAW! MOREOVER YOU'LL LOOSE YOUR AMATEURRADIO LICENS FOR GOOD AND HUGH PENALTY I FINES!

esta modificacion transmite en 11m y en uhf en la banda de los talk about gracias