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FT991 VHF UHF Extended Transmit
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- čas přidán 16. 05. 2017
- Extending the transmit range on a European FT991
This video is for information only, anyone acting upon it does so at their own risk.
It is strongly recommended that memory and so on is backed up, as a master reset is required.
This allows transmission on 144-148 and 430-450 without having to go into the service menu.
I'm wondering, has there been any further developments on expanding the UHF/VHF TX on the FT-991A? Or finding the button combination for reverting back to EU from US? At the minute, I'm using the service menu work-around because I'm not sure what the downsides are to turning my 991A into a USA version.
Well done, I had been following your service menu version to do extended tx , thx for this updated vid
After a complete reset of my FT 991 the band vhf remains blocked from 144 to 148mhz impossible to go below 144 or to rise above 148. That has the solution. Same as UHF band locked from 430 to 446. I note that the HF bands are not blocked.
Thank you . 73 from F0GFI Dany
Hi Joe, this proceedure changes the 991 to American Amateur band frequency coverage. 27mhz is not an Amateur band so is not changed. However, if you look at my other video for the 991 which details operating the rig in service mode, this will enable tx at 27Mhz.
73.
thank you very much Jed, 73!
thank you. 73 + 55 from Spain.
This mod does not work on the latest version of the 991 or am i doing something wrong
Hi Sam, I doubt you are doing anything wrong, Yeasu objects to the mod and later issues of software bar the mod. Another example of tech you think you own, but you are prevented from making alterations.
@@oldcorvus Any other way of transmitting on the 446, Jed with me having the latest firmware
@@samallenby571 Hi Sam, 446 TX can be done using the 'Service Mode' this is more difficult for Yeasu to bar so it might work. It is more 'fiddly' to do and care needs to be taken. Have a look at the video. czcams.com/video/xNUnyZxu918/video.html
@@oldcorvus Yea Service mode i understand, but once you turn radio off, it goes back to the original setting of not being able to transmit. I was trying to find a way of transmitting 24/7 on the radio, so you dont need to keep going in ad out of the service mode
@@samallenby571 Unfortunately Sam I am not aware of any other method that is easily applied without taking the rig to bits and invalidating the guarantee, this was the object of the video, to aid people who did not want to take the unit to bits. However, in the area of Q3026 there are jumpers which have a bearing on frequency coverage, no info is available from Yeasu of course, but I suspect the answer to unlocking the frequency limiting lies there, and it may be with some careful 'trial and error' a combination could be found to 'wide band' the coverage without having to go into service mode. If you feel confidant enough to 'give it a go' I would be interested to know your results. Note this is only a suggestion which would be carried out at your own risk. I would guess quite a number of people would be interested in a 'wide band' setting if you cracked it.
I must have the card kicking around somewhere so when it turns up I will let you know Jed. I can remember it took quite a while to sort itself out after the key presses, I would imagine it arrived as a USA model and then was converted to Euro. I should have given it a try first....
Thanks, Graham.There are usually three versions USA, EU and SE Asia, I look forward to hearing from you when you locate that card, I will also check to see if the info is on Yeasu's web site, though I won't hold my breath on that:-)
Does this only work on a VFO? or can I select a memory channel prior to performing the button press?
Doesn't work on 991a :(
Perdonami JED, notizie sulla possibilità di tornare indietro alla vers. Europea dopo espansione da te illustrata? Grazie73
hello Jed I modified my 991A this morning and all went well, reloaded the memories etc. One slight problem was I had to turn off the power supply before the button sequence, the first time I tried it nothing happened so in my case the power had to be off completely.
Thanks again for a very useful tip.
Hi Graham, Pleased all went well. It has come to my notice that there are what appears to be different software upgrades, although results are generally the same there can be some minor variations.
Hello Jed, I have run into a problem with the latest Yaesu update which involves pressing the 14 mhz button for a few seconds to access the 5mhz band vfo. Well it seems that as the rig is now American after the mod, the 5mhz memories have now been programmed for American only so it would appear I can not use 5mhz Brit freqs any more. I was thinking that you must know the key combination to put the rig back to UK spec as you must have performed the mod more than once when you produced your video? If you recall there was a card in the box with my 991A instructing me on the key presses to make it Uk spec before using it for the first time. Well, I have looked everywhere for the card and it seems to be lost. I was wondering if you could share the key presses with me discretely please? My only other alternative would be to take the front panel off and do the full mars mod soldering the link which has been publicised.
Do you know how to reset the EU setting back?
no way to backup to eu version...:-(
Hi Jed. I have a 991 but this is does not seem to work on mine. Is this a problem with the firmware, or can this be done to transmit on the 446 without going in service mode
GD DR OMs. Will be this combination also run on European version FT991A?
Hi,thankyou for the great video again:) does this do the same thing for other bands too or just vhf?? (11 meters)?? Many thanks
Hi Andy, Performing this mod limits you to transmit and receive ONLY on144-148Mhz and 430-450Mhz, LF and HF receive is unaffected. Transmit on LF and HF bands conforms to USA allocations, plus a spot frequency in the memory channels for 5.1675Mhz which should be avoided as it is an emergency channel.
So American Amateur bands only. If you are authorised to use frequencies outside the Amateur allocations then you can TX anywhere between 1.800Mhz and 54Mhz using the radio in Service Mode, czcams.com/video/xNUnyZxu918/video.html. Note, If you perform this mod there is no going back to the previous settings without having to to return the transceiver to a dealer to reprogram.
Hope that's of help, 73.
@@oldcorvus
Hi, I had my 991 adjusted by the Mars Mod, then I master reset it to American, now it transmits/receives on all bands
including all the CB frequencies & PMR. Hope that helps
@@mrkellywilderspin Useful info thanks for sharing.
Does this mod affect the power output of the radio i.e does it still do 50w on 2m band, thanks and if you find the reverse method please post it.
Hi Matt, There is no change to the power output.
Bonjour pourriez vous me dire si il est possible de revenir a la version precedente
To Dragon Eyez the answer to your question is no. If you want to TX on 27 and 465 you need to operate in the service mode see FT991 Extended Transmit HF VHF UHF video.
thank you very much, I hope it also works on my 991A. when I reload my memories do you think it will change anything?
Hi Graham, It will work on the 991A. The one thing that will change is the Automatic Repeater Shift, you are configuring it for the American market, it is best to switch off this function in the Menu, then there is no risk of any accidental out of band transmissions. I put all the repeaters I use in memory so they have the correct shifts and tones etc. This video concerns just covering the USA VHF/UHF tx range, there is another video detailing wider tx operation of VHF/UHF and HF which does not involve making the rig American you may wish to see first on this link = czcams.com/video/xNUnyZxu918/video.html
73. Jed
Thanks Jed I have already viewed that one some time ago. Thanks for your quick reply, much appreciated. I will certainly have a go in the next couple of days. The repeater shift problem has been noted. 73
@@oldcorvus doesn't work for 991a!
@@paulkazjack Yaesu does not like this modification on later versions they have adjusted the software to stop this from working, so it depends on the software issue that you have.
and how do you get 137 to 164 and 420 to 470 mhz back on receive ?
i tried this and now its 144 to 148 and 430 to 450 mhz
receive / transmit
what is reset to get back my extended receive ?
Thanks for the video Jed, very helpful. How do you return it to standard UK tx?
Hi, Pleased you found the video helpful, I am sorry to say I have not researched turning the radio back to UK settings, I have no doubt there is a three button combination, as with the USA setting, to obtain not only the UK settings but the Taiwanese/Japanese settings also, Yaesu will not release the info, indeed they say it cannot be altered, which is obviously a lie. It is only after many hours of trial and error that the 'secret' key combinations are being found. I can only suggest at the moment that you ask the question on an FT991 forum for the latest info.
73, Jed.
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
So would it be able to transmit on both regular cb band (27mhz) and gmrs (462mhz)?
Asking the real questions, sorry to reply to an old ass comment, but did you figure out if the 991 works on GMRS/FRS?
Can you extend to 170.000
if you change to USA settings to transmit on 446mhz, how do you enable the repeater shift on 2m, do you have to do it through a memory. thanks
Yes, you have to do it in the memory as the auto repeater shift is set at American frequency spacings.
Has anyone attempted this recently and with what version firmware ? I bought an EU model FT-991A in october and had no success with that procedure. Ive tried with version 1.8 & 2.0 main.
just had a thought about returning the rig to European spec. When I unpacked my 991A there was a card in the box telling Euro users to press a combination of
keys before using the rig. I would imagine this sequence would work again, but there again why would you want to?
Why indeed, Graham, but the question of how to return to European settings has been asked by others, it is interesting that Yeasu have included this card, to date they have not been helpful in this respect, hopefully this is a change for the better, if you could make the info public it would be very useful to the knowledge pool. Cheers Jed.
Well Yaesu Tech support wont give the answer I emailed them describing the button presses , there reply was "No sure were you obtained that information. Yaesu does not modify its radio’s FCC Type accepted TX frequencies"
Hi Matt, not surprised you had that reaction from Yeasu. Yeasu and their agents have consistently refused the info or have said it is not possible to change the transmit range which is a lie.
another update.... Yaesu offered to take my radio back and align it for free and put it back to u.k spec LOL.........Dear Matthew, Thank you for your inquiry and patronage to YAESU products. For your FT-991, could you kindly send it to our UK office? They will check and align your radio to function as designated, free of charge. Yaesu UKwww.yaesu.co.uk I have copied Sam Ruddy in this email. For any details, you will hear from him soon. Thank you for your continued support to YAESU. We remain,
Very truly yours,
Customer Relations Department
Yaesu Musen Co., Ltd.
So they want you to return the rig so they can press the three buttons they don't want you to know about, utterly daft.
thank you...very good ...73
Hi Jed does this rig TX after MOD on PMR band 446MHz??
Yes.
@@oldcorvus thanks. What I will loose compare to EU version?
@@OM0ET Because the 991 is changed to American specifications you will on VHF and UHF lose 118--144, 148--164, 420--430, 450--470, none of these are Amateur allocations, you will gain TX on 146--148, 440--450.
@@oldcorvus thank you so much Jed. I am gonna try it on my 991A
@@oldcorvus I did try it but this combination of the buttons doesn't work on my 991A. I tryed it couple of times. I tryed to switch off the PSU also but still nothing. Radio will start normally.
It would be nice to monitor airband 122 mhz
It is possible to go back to the european version.
does this change not work on the ft-991A? why ?
Unfortunately a different issue of software.
You seem to also lose the ability to tune above/below the expanded 2 or 70, so beware if that's an issue.
Ian P mine tunes as normal nothing missing on mine.
Which version of the yaesu 991 firmware are you running please Matt.
Ian P latest version , I can press band select 144 and tune up and down from there all the way as before I did this mod same as if I press band then 430
Do you know how to reset the JP setting back?
Yaesu have never released that information.
How to know if 991 is EU or US version, tnx, 73
Check the TX frequency, for example, TX between 144 to 146Mhz is European, TX 144 to 148Mhz is USA.
Why would you want to wideband anyway?
It illegal and you’ll only work pirate stations.
Don’t see the point in messing up a fine rig.
In England transmission between 146 to 147 is allowed, so widebanding is required to transmit in this range. It is not therefore illegal.
genial! Thank You! mni73+
EXTENDED TRASMICION FT 991 TUCH FAST LOCK f .....