Yaesu FT290R evaluation of four 2M sets
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- Опубликовано: 30 май 2021
- No, we don't service amateur radio gear, nor SSB equipment, so what on earth am I doing evaluating four Yaesu FT290R multimode transportables?
Well, my amateur radio friend Stewart asked me to see what was happening with these four sets that a local Radio Amateur was offering on the basis that none worked properly. In fact, I actually reset the frequency. It's not s quick task as there are 6 steps & three adjustment to monitor & make. I ended up doing this in all four sets even though the first one looked OK on the test set. Anyway, they are all doing 2.5W with full deviation & all receiving better than 0.5uV.
On the air test to follow
Recorded 31st May 2021
Richard, G0OJF
Lincolnshire, UK 
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This, not so 'well documented' test, of the different radios, helps me a lot, to aglin my FT-290R so much better, that everything is now 'allright'! My Nr.:1-Type is now 100% in spec.! Have now to look for a service-manual for my "Yaesu FT-290R II" !
(I have a 'bunch' of this little radios, ... ! Also for micro-wave frequencies, ... !
1x FT-290R, 1x FT-290RII, 1x FT-790R, 1x FT817 and 1x Standard C-58, all the same "form-factor", very small (vhf/uhf/sw)-allmode TRX, with abt. 1 to 5W output. Very '/portable', ... !)
Sorry for my bad English, it's not my native tounge! - Hpe 2 cu on sw or shf 1 day, ... ! -
73 de Markus - db9pz (JN39fq ; 3miles/5km east of LX)
The service manual is part of the user manual, not a seperate publication.
Richard, G0OJF, UK
Thanks Richard, Watched it all.
They were good sets but the last one was a transportable version and would have a leather case and a lead acid battery and were not that rare but most just over 2.5 watts ver y sort after in their day Tony G7BJO
Hello Richard I'm Intrigued As To Why They Have Such Low Power Output ? Lovely Little Radio's Though
I've Got A Plastic Lunch Box FT 747 Still Working Perfectly I Think That Does 0 - 30 mhz Outputting 100 Watts
I Look Forward To Seeing The On Air Test For These
Bless Up Fella
Because they're a portable radio and run on batteries.
hi Richard i know you don't like ssb radio's but they were well built in the 70 s and 80 s ... well Done . in fixing them ......
The BNC one looks like someone has done the 70cms antenna conversion,
the 790 had BNC so i suspect the 290 had been converted the same way to use BNC instead of the telescopic.
Where did you download the service manual from ??
Myself! rshireby@yahoo.co.uk
@@ukfmcbradioservicingTango21 4-10 Breaker.
The 2 metre band is 12.5Khz channel spacing and has been since about 2000. Your friend will be splattering with the deviation set at 5Khz. I'd set it at 2.5Khz if there going to use it on FM.
Hi,
A very good point. Currently I am looking for a guide how I can modify the Ft290 to 2.5kHz deviation... Any advice, please.
Many thanks
Piotr
👍
I like richards vidios
Repairing radios
From paul
The best one might have a Mutek front end.
It didn't.
Richard
How much would you charge to program a Maxon PM150 to four meters? I did email you but haven't had any reply.
Nothing received, please try again rshireby@yahoo.co.uk
@@ukfmcbradioservicingTango21 Thats the one I sent it too. It might be going to your spam or junk folder. I'll send the email again.
I have seen Peter Parker (VK3YE) using one of these.
This is only for the people who have successfully taken and passed the Foundation,Intermediate and Full examinations or in the USA the Foundation,General,Technician,Advanced and Extra Examinations and got their licence and callsign.
Yes, this is nothing to do with CB radio whatsoever.
Richard, G0OJF, UK
Lot of work involver with those radios.
They hold their value because there's so little to replace them with if you want a 2M ssb/fm portable?.
They are deaf because of the stupid telescopic whip and So239 matching system they copied
from the Kenwood TR2200, which almost works on the Kenwood but not on the Yaesu.
When the telescopic in depressed it slides into the tube along inside the radio, causing a
high impedance mismatch so the so239 is somewhere near 50ohm, the telescopic must be fitted
or neither front or back work. Yaesu didnt try to make a 70cm version work, on the FT790
they simply fitted a BNC on the front connected to the PA 50ohm o/p and RX in, and rubber bung
plugged where the so239 went
Which is the best mod to do on the FT290, that last one you had with the BNC on the front
got it right, but completely wrong leaving a BNC or SO 239 connected on the back,
two connected BNCs cant match 50ohm. AFAIK all Yaesu of that era had FCC plates
on the back, they are easy to swap from 5/10k to 12.5k/25k, with 4 wire jumpers that also
offer different band limits, the widest US ham and MARS use is 143.5 to 148.5MHz 5/10k.
widest 12.5/25k is 144 to 148, default for UK is 12.5k /25k, 144 to 146
Thanks for sharing Phil. Forewarned is forearmed as they say if I see one at a rally.
XIEGU Transceivers are also available on the same frequencies but are SDR transceivers based on the Broadcom ARM chips.
Ehehehehehe. I have this radio, too.
What is the point of this post? Most manipulations are out of shot. No explanations of how or why the measurements are being made. I can only assume that this was done under sufference ".. we don't do amateur radio..."
Quite right. I've put a total stop to amateur radio stuff & the odd one in the future will be my own only, which will either be ex business radio or built by me from scratch.
That said, the adjustments made in this video are all as shown in the service manual, so no explaination is necessary as those manuals are easily downloadable for free.
It doesn't matter how hard I try, I just cannot get interested in Kenwood/Icom/Yaesu commercially made amateur radio gear. Just looking at the SRBP PCB's in these products tells me they are not expected to last any longer than a TV set. Coming from a commercial 2-way business radio background where the products were on fibreglass boards I'm not exactly impressed. Hopefully these manufacturers are now on fibreglass boards. It's not like these sets were cheap, because they weren't.
Richard, G0OJF, UK