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My FT-847 won't transmit on 80m


Dave K?EKL
 

I have an 847 that I use almost exclusively for VHF/UHF week signal work and for satellites but it got pressed into service for our local club's Field Day this last weekend.

It performed perfectly on 10, 15, 20, and 40 but when trying to transmit on 80 meters the display reads "ERROR". This happens whether the radio is set for CW, SSB, AM or FM and it doesn't seem to matter is PTT is asserted via the DATA IN or PKT connectors, the footswitch connector, or the front panel mic connector. Again, only 80m is effected.?

I know from reviewing the manual that the radio will display ERROR if one tries to transmit out of band but I was testing on 3.850 MHz.?

Has anyone seen this before and if so what's the resolution?

Thanks de K?EKL


 

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Hi,
That suggests to me that it’s UK model… our ?80mtr band stops at 3.8Mhz...

73 de Frank, M0AEU


On 27 Jun 2022, at 21:00, Dave K?EKL <k0ekl@...> wrote:

I have an 847 that I use almost exclusively for VHF/UHF week signal work and for satellites but it got pressed into service for our local club's Field Day this last weekend.

It performed perfectly on 10, 15, 20, and 40 but when trying to transmit on 80 meters the display reads "ERROR". This happens whether the radio is set for CW, SSB, AM or FM and it doesn't seem to matter is PTT is asserted via the DATA IN or PKT connectors, the footswitch connector, or the front panel mic connector. Again, only 80m is effected.?

I know from reviewing the manual that the radio will display ERROR if one tries to transmit out of band but I was testing on 3.850 MHz.?

Has anyone seen this before and if so what's the resolution?

Thanks de K?EKL


 

Did you perform a memory clear all reset?





On Monday, June 27, 2022, 4:04 PM, Dave K?EKL <k0ekl@...> wrote:

I have an 847 that I use almost exclusively for VHF/UHF week signal work and for satellites but it got pressed into service for our local club's Field Day this last weekend.

It performed perfectly on 10, 15, 20, and 40 but when trying to transmit on 80 meters the display reads "ERROR". This happens whether the radio is set for CW, SSB, AM or FM and it doesn't seem to matter is PTT is asserted via the DATA IN or PKT connectors, the footswitch connector, or the front panel mic connector. Again, only 80m is effected.?

I know from reviewing the manual that the radio will display ERROR if one tries to transmit out of band but I was testing on 3.850 MHz.?

Has anyone seen this before and if so what's the resolution?

Thanks de K?EKL


 

Try it on 3.799


On Mon, 27 Jun 2022, 21:51 vstockma@..., <vstockma@...> wrote:
Did you perform a memory clear all reset?





On Monday, June 27, 2022, 4:04 PM, Dave K?EKL <k0ekl@...> wrote:

I have an 847 that I use almost exclusively for VHF/UHF week signal work and for satellites but it got pressed into service for our local club's Field Day this last weekend.

It performed perfectly on 10, 15, 20, and 40 but when trying to transmit on 80 meters the display reads "ERROR". This happens whether the radio is set for CW, SSB, AM or FM and it doesn't seem to matter is PTT is asserted via the DATA IN or PKT connectors, the footswitch connector, or the front panel mic connector. Again, only 80m is effected.?

I know from reviewing the manual that the radio will display ERROR if one tries to transmit out of band but I was testing on 3.850 MHz.?

Has anyone seen this before and if so what's the resolution?

Thanks de K?EKL


 

Field Day really brings out the problems. I have 2 FT-847's. One belongs to the Club which I cloned to be the same as mine. For the ISS V/v frequencies, both do the same thing. Main vfo shows 145.850, sub vfo shows 144.490. Press the PTT and the sub vfo shows error on both rigs. All the other sat pairs are fine. So this problem in on my list of troubleshooting jobs.? 73 de VE3XC


 

Try wide banding it then a reset, failing that? as these radios are rather old, so perform an alignment, this should sort it out.

BR

Andrew

If you can not perform this? then I can

Get


 

You can use the sub on the same band. You have to use split a/b vfo.?
Satpc32 help file explains what to do for ISS etc.?
Vic?




On Monday, June 27, 2022, 5:03 PM, Dennis Surek via groups.io <dsurek@...> wrote:

Field Day really brings out the problems. I have 2 FT-847's. One belongs to the Club which I cloned to be the same as mine. For the ISS V/v frequencies, both do the same thing. Main vfo shows 145.850, sub vfo shows 144.490. Press the PTT and the sub vfo shows error on both rigs. All the other sat pairs are fine. So this problem in on my list of troubleshooting jobs.? 73 de VE3XC


 

You can not I meant to say. ?
It is expecting to be full duplex and can’t if tx and rx is on the same band.?
Vic




On Monday, June 27, 2022, 5:13 PM, vstockma@... <vstockma@...> wrote:

You can use the sub on the same band. You have to use split a/b vfo.?
Satpc32 help file explains what to do for ISS etc.?
Vic?




On Monday, June 27, 2022, 5:03 PM, Dennis Surek via groups.io <dsurek@...> wrote:

Field Day really brings out the problems. I have 2 FT-847's. One belongs to the Club which I cloned to be the same as mine. For the ISS V/v frequencies, both do the same thing. Main vfo shows 145.850, sub vfo shows 144.490. Press the PTT and the sub vfo shows error on both rigs. All the other sat pairs are fine. So this problem in on my list of troubleshooting jobs.? 73 de VE3XC


 

True

Get


Dave K?EKL
 

Thanks for the replies. I have not yet fully unpacked the truck from Field Day. When I do bring the radio back into the shack I'll try a full reset, try transmitting on freqs across the 80m band and then perhaps try the out of band mod.


 

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Out of band mod?? I wasn't aware that there were any such mods for the radio (e.g. to get it to Tx on the WARC bands)...

Greg? KO6TH


Dave K?EKL wrote:

Thanks for the replies. I have not yet fully unpacked the truck from Field Day. When I do bring the radio back into the shack I'll try a full reset, try transmitting on freqs across the 80m band and then perhaps try the out of band mod.


 

Hi Greg, check the Group Files section, there is a folder there - FT847 Mods - in there you will find a Yeasu datasheet on frequency mods, it extends the range of the set. i uploaded it quite a while ago to the original Yahoo Group.
Leighton. GW3FSP.


 

Thanks Vic. Something in my head says I should have thought of that myself.?
Dennis VE3XC


 

Ha!? Thanks, didn't see that before.

Greg? KO6TH


gw3fsp via groups.io wrote:

Hi Greg, check the Group Files section, there is a folder there - FT847 Mods - in there you will find a Yeasu datasheet on frequency mods, it extends the range of the set. i uploaded it quite a while ago to the original Yahoo Group.
Leighton. GW3FSP.