Many thanks for the video, I've had a poke around the engineering menu as few times as I was aware that the radio would TX but never thought of this as a way of actually using the radio out of band and as you have said everyone please be careful not to adjust the settings in your radios, you can seriously mess them up if you!
Despite Yeasu insisting that it is not possible for the European version to transmit extended range on vhf and uhf, I remember what I used to tell my students back in the 1980s that 'Nothing is impossible in electronics' :-)
Even after all this time, The wide banding of this radio still seems to be a well guarded secret, The only hint I have heard is that the only way to open up the vhf/uhf portion is somewhere in the firmware and Yaesu will not divulge that information. With this radio being out as long as it has been now I'm surprised someone has not come up with a custom firmware or a software way to open up the vhf/uhf side. The fact that it can not be opened up on that portion is the only reason I'm buying the IC-7300 instead and just using my 7900R/E that is opended as my vhf/uhf base. Wonder if anyone else has not purchased this radio for the exact same reason. Yaesu may want to think about that. 73's Thanks for the video N0MLP
As far as I know you cannot open up the VHF/UHF on a 991a. That's why I have a Kenwood 781a that I'm fixing to open up. All you have to do is remove a jumper (2 ohm resistor) and it will cover 129 to 179 MHz. Really easy to do. The best radio to open up is an ICOM 746 as you can open up the HF as well as the VHF/UHF. W Rusty Lane K9POW in eastern Tennessee
Crap… I was just going to buy one and found this out. I only have radios for emergency purposes and GMRS is a must as it will likely be used widely during a crisis. FCC has really missed the point. I have a FT5D ht which CAN be made to work on GMRS and FRS and I have GMRS radios that I transmit on during “peacetime”, but if I spend a grand on a Yaesu I have to also carry around a CB and a GMRS to relay emergency traffic during a crisis? Thank God for the CHINESE who make their junk modifiable. The FCC needs to wake up. Radios are like guns. There are millions with guns who will never use them for anything but good and only a tiny percentage who use them in crime. Someday someone might really need a “good guy” with a gun, and someday the USA might need some good guys with unlocked radios to monitor and communicate with the “Walmart Special “ FRS, GMRS, and CB channels since these radios outnumber the radios owned by licensed amateur hobbyists by ORDERS OF MAGNITUDE. I have a GMRS license and am about to take my HAM test, and I stay legal and respectful on the air, so if someone dies because I wasn’t carrying and monitoring 4 radios, then that blood is on the FCC and their sad ham followers who think they are so damned cool and official. Guess what? The real bad guys burn down cities and keeping the guy with a $1000+ radio from transmitting out of band is a concern that NOBODY is going to care about during SHTF and almost nobody cares about NOW since it is so rare. 1 991 sale deleted. I really wanted one.
Jed, many thanks from Australia for this one. I purchased a brand new FT 991A only 1 year ago. What you have shown is totally applicable and works with the Ft 991A. Antenna tuner goes ok. I only tried the 27 Megs band and is a total winner. Well, 27 Mhz is not far from 28, hence the PA will have the dynamic range. The tuner may have its limitations, I am guessing but you can always use an external MFJ 969, as I have one, since the variable inductor and the rest will tackle a gigantic range, just by its own inception. The built in antenna tuner will work when the shifts ( - or + ) may be confined to certain percentage of deviation from the main bands (ham) that has been designed for. Anyway, I am not an expert but tuned circuits, in the end, depending on how they are designed and built have not infinite coverage, I think ? VK2CRB ( ex LU1BBG)
Don't want to touch your new radio with a soldering iron?. Have a friend handy (two person job) Removing the top and bottom covers is easy. The front control panel has no screws and simply unclips. removing the internal plate is as easy as 8 Philips head screws, there are no wires that require disconnecting the internal plate and control head can be moved far enough away to perform this mod. Hold a fine point pair of tweezers on both contacts that would normally be soldered together (other videos show the soldering procedure) and reset the radio. This works, it fools the CPU and it remains. The only time it does not remain is if or when you do a firmware update. Check for current firmware first. I found this on a forum and no where else, tried it and it works. No loss of functions and no internal butchering.
@@mathieujanssen312 It does - but one step was missed out. After bridging temporarily, you then need the second person (this is why you need two) to then do a complete RESET (hold FAST and LOCK while powering on) WHILE the tweezers are still in place. (As you would for the MARS mod), the radio then notes the state of the jumper and will retain it until you next do a RESET. I am in two minds on this "non-mod mod" however, as when you do it with an iron, the unit is OFF until you choose to power it back on. So unless you are careless AND do not sort out the solder-splash etc, then no harm is likely to happen. BUT with the tweezer mod, you need to power-on while holding the tweezers in place and ONLY shorting out the two correct pins. If you slip and make contact with other pads, things may get grim - and as the power is ON - there may be no going back. Although it *seems* a safer mod, I am not convinced that it is so. As VERY little current needs to flow here, if you are nervous about using a soldering iron, you could just apply a "dot" of conductive paint with a cocktail stick (the type you repair heated rear windows with). If you mess up, you wipe clean and start again. Only when you are happy, do you then power up. Applying a "dot" of conductive paint over the contacts is perhaps the safest and simplest. OR give your friendly rig doctor £20 while he does the mod for you in twenty minutes :)
Never tried it! I don't know is the honest answer, I don't have a suitable 991 to hand at the moment to give it a try, I don't believe it would do any harm it would either work or not. If you try it I would like to know the result......
Gary K4THN me too! GMRS call sign is a mouth full of marbles but looking for a solution that allows for interoperability instead of multiple smaller cheaper radios in vehicle more room, look less geeky, but talk to family on GMRS and friends in the UK, and local truckers on 11 if in emergency is nice. I like Yaesus atas as it goes to 70cm but love the Codan 93xx antennas.and the new envoy with ALE, emergency operations so effortless, you no longer need to hire real men lol.
It is outrageous, we can not go back (1.8-55.999 Mhz, 137-163.999Mhz, 420-469.999Mhz), I will complain, I'm not the only one in this situation. Mr. Jed Deadlock give me the solution.
I quite agree, Yaesu insist that the European version can only be opened on the 1.8 to 55mhz range. not on vhf or uhf. I am sceptical as this goes against the standard practice, so I offered this method as an option which did not invalidate the guarantee or risk damaging the radio by making random jumper connections. Best wishes.
it works but, but after I got back to normal mode I have faced an issue, changing the Mode force you to change the frequency and it get shifted, any idea on how we can solve this out?
Jed, thank you for the video! Do I understand correctly: that in order to transmit outside the amateur bands, you need to enter the service menu every time. That is, every time to do these operations anew? That is, in the normal mode of operation, the radio does not store the extended range settings?
Somehow I got a FT-991A transceiver, which already can work on transmission at all VHF and UHF frequencies ) Even he was surprised. I bought it in Russia, the European version.
Jed, hello! I buy a transceiver, which was already working on the transmission in full range of VHF and UHF. The jumpers on the control board looked like this: www.nevaphoto.com/other/IMG_8907.JPG (the first two are small smd-elements, similar to resistors) When I connected the third jumper on your recommendation, the receiver also transmit the full range and on the HF too. In VHF and UHF bands nothing has changed. Try, maybe, it will help you too. I apologize to the low level of my English. Sincerely, Dmitry from Russia.
Дмитрий Песочинский. Many Thanks Dmitry for the information, it is very helpful. I strongly suspected Yaesu were not telling the truth when they said it could not be done. Best Wishes Jed.
Tried on FT-991A and it won't do this mod. I do note, my rig has had the "MARS" modification done already but it doesn't allow TX out of band on normal amateur freqs but does do 11m?? Are you saying it resets to normal when you turn it off, so you have to do this every time?
Thanks for the video Jed, very informative. Do you have any tips on how to wideband the FT1D as well? I have the FT1XD and also the NoV for 146-147MHz but I'm unable to use it at the moment. 73 M0VVA
Hi Andrew, The FT1D is very easily widebanded. I have done a video of this in response to your query. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-36vC6ptcKrg.html 73.
hi, i wanted to know how to expand vhf uhf ft-991a, which one of the two videos should i do? Is the radio used in Italy combining something by modifying it? which do you advise me to do? my radio has not been made the internal modification of the bridge we need to do it? I'm looking for news thanks
Have a look at this video, this extends just vhf and uhf to American frequencies, so 2m tx/rx goes up to 147.999 and uhf up to 449.999. You forfeit out of band reception and I don't have a code to revert back so at the moment it is a non reversable change should you choose to do it. Note=On newer issues of software Yeasu have blocked this function. Hope this is of help.
@@grahamclarke5022 Please to direct me to the video to adjust the Japanese usage model of the Yaesu FT-991A to be able to operate on North American frequencies. Someone wants me to adapt a Japanese usage model to Canadian Frequencies. Granted, the 70 centimetre frequencies vary from the United States of America to Canada. However, the United States of America's frequencies are closer to the Canadian use frequencies than the Japanese use frequencies. Thank you, in advance, for your assistance.
@@indridcold8433 The link for extending the Vhf and Uhf range of a European FT991 to USA range is ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KAzcsNqbTN8.html IMPORTANT = This procedure once performed is not reversable....Also I made the change on an FT991 not the 991A version so I cannot guarantee it will work.
@@oldcorvus Thank you for this information. Do you know what the difference between the FT991 and the FT991A is? The World Wide Web is rather vague with answers.
Our city police dept. transmits and receives on 460. xxx Mhz .Would this mod permit one to tx on this f ? If so, this f and other would need to be avoided ..
Graham Clarke-I've wondered for a while if there's ham band radios that would Dx on public service f's. I monitor the local PD on Friday and Sat. nights when I hear sirens just to find out what's what out there. The Yaesu FT-990 is a fab radio, and I plan to get one some say. I'm new to Amateur Radio and have recently purchased the 857D. I have the ATAS 120A for my truck but haven't found a decent mount yet. Thanks for your reply !
That is an unusual allocation, TV frequencies in most parts of the World, and precisely the reason why it is not economic for RF modules covering this range to be included in Amateur equipment. If the regulations are like those in the UK (446 allocation), you could argue it was a shrewd move on the part of the regulatory authority to ensure that only type approved equipment is used on those channels. The only Amateur equipment I have seen that goes up that high, (up to 511), is made by Alinco, so possibly worth checking out.
Ouch, that is expensive, sorry about that, the 991 is a good rig despite Yeasu being difficult about enabling extended frequency coverage. Lack of sales at that price will hopefully force the price down for you. 73.
That is not the proper way to do it. You NEVER keep your radio in the service mode. Please don't give misinformation when you don't know what your doing.
I have europan FT991 with MARs that is working only on HF band. But I cant transmit on 446 MH PMR Bands :( Is it possible to transmit without entering to service menu?
Would the mars mod take care of all these frequencies? I plan on buying one here within the next month and was going to pay the extra $25 for the mod to be done.
JOSEF BORG I did get the radio, I also did get the mars mod, but it doesn’t effect the vhf/uhf portion of the radio, only hf, other than that, I haven’t noticed any issues good or bad. Thanks for getting back to me, KG7VDN, 73
1. Can you tune (internal or external tuner) when using an extended range frequency in the service mode?2. Does this work with the North American version of the FT-991 (Can another user check theirs)?
I have tried the internal tuner on my European FT991 on 13.800Mhz and 55Mhz and it performed ok. Yaesu do not guarantee full spec performance outside normal frequency allocations so there may be some frequencies that will be difficult to tune. I think it is reasonable to assume that the service mode is common to all versions.
@@oldcorvus I have the MARS mod done and the tuner works fine on 11 meters. The antenna tuner inside of the 991(a) will tune any frequency below 55 MHz as long as the antenna is somewhat resonate, i.e., SWR 3:1 or lower. It's not the job of the tuner to make your antenna resonate. As long as it's close the antenna tuner will do its job. I have an Antron 99 that I use on both 10 and 11 meters and on 11 meters without any tuner will return a 1.5:1 every time. Since the antenna is close to resonate on 10 meters, the internal tuner will match the antenna. Antenna tuners are not really antenna tuners per se. They just match the transmitter to antenna and some power is lost in the match. W Rusty Lane K9POW in eastern Tennessee
It works on GMRS frequencies. That is the main reason I needed the mod. New versions of this radio, (mine is 6.’23), no longer allows vhf/uhf mod internally. Yaesu changed the hardware completely in this area. Only the method used in this video works. Just letting you know. At least with the US Versions. Michael
Have you figured out how to Save s Split Channel in Memory? I always try to Save the Split but it Splits with VFO B. And you can’t Save it in memory as a Split this way. Michael
The entire world is not the nation you reside. There is an entire planet outside the boundaries of your isolated nation. There is 4 meters, CB radio in many different ranges, lots of unlicensed ranges for public use that likely do not exist in your nation, frequencies that are for public, unlicensed use, that your nation has that many other nations do not have for amateur radio nor public, unlicensed, use. The planet is a very varied and dynamic place.
@@mihailpanayotov3620 There is a small solder pad to short that will allow for use of all HF frequencies. I did it for someone. However, I do not know if that will make one with 144Mhz to 146Mhz limitation be able to operate from 144Mhz to 148Mhz. I got paid to do it, so I tested only what the operator wanted me to test. She said nothing about checking VHF.
thanks jedd, very interesting... can i ask, when these 991s have been mod'd, regarding filtering, have you found any particular bands that you had to attend to ,,, thanks, G7WDH
The set parameters are not changed in 'Service Mode' unless the 'Clarifier' control is adjusted. It is essential this contriol is not adjusted while operating in 'Service Mode'' under any circumstances, as this will change fundamental factory settings.
@@grahamclarke5022 THANKS very much there, as for a 1st HF radio to use as a homebase , i'm catching up 21 years in as little time as possible!!, i'd never heard of D star Fusion, seriously, i only foiund out last year i can TX on HF now without doing my CW 9 which i do want to learn, a 25 year older head has more patience now,,, i hope) but im loving these radios, but still tempted with a field/base for starters, possibly FT 897D/857 ....but they lok fab, 800 UK pounds from a dealership 2nd hand too is really good ...regards G7WDH
@@siientsinger6637 Radios have improved and diversified greatl,y in recent years, I am sure whatever radio you choose will give you great fun and interest. Good idea to do CW,. 73. it is still the original and most efficient form of transmission
@@grahamclarke5022 Absolutely , not only is it fascinating , but i got that "Buzz" feeling when me and a pal used to join an online sunday eve "slow Morse Tuition" group, well i was even sitting with my headphones on with a Home Brew Morse key, but that buzz being it gets peoples attention who when you laugh at something funny, five words that took 5 minutes to send and decode at first, but when it started clicking and i was gewtting it Graham, it's mysterious , it was to my ex wife who thought i was arranging a lads night out ! but no, im determined to "re gel " what sadly i have forgotten ... 73's Graham, D Hankey G7WDH
