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FT-847 Transmit Problem

Phil Stanley
 

Hello Group - Trying to troubleshoot a Transmit Problem - trying to set-up for FT8 HF.
As I adjust RF Power and MIC Gain while transmitting FT8 the -847 cuts out and Display flashes and I loose CAT connection. Note - this also occurs if I use a microphone. As I increase MIC Gain it cuts out. During FT8 HF - as I adjust MIC Gain I get to a little over 10-12W and the radio cuts out. I’ve tied all combinations of FT8 input levels to no avail. What am I doing wrong?? Or is there a problem with the radio??
Phil
KD2XN
Re: Squelch at FM mode works not correct

 

Thanks for your help, but if it were the potentiometer, why does
everything work fine on SSB? There must be something defective or
adjusted in the area Sqelch or AGC, or?

73, Tom

Am 21.12.2022 um 10:19 schrieb m1cxz m0cnl:

As a last ditch resort before replacing the pot, I have dismantled
them before and given them a clean. Generally the wiper either gets
corrosion on it or it's just general dirt buildup (use switch cleaner
or my preferred method of ipa). They are usually very easy to take
apart by bending a couple of clips that you can easily bend back
afterwards.
Good luck finding a replacement if you have to, as spare parts are now
very few and far between unless you buy used, which comes with its own
potential problems.
Re: Squelch at FM mode works not correct

 

As a last ditch resort before replacing the pot, I have dismantled them before and given them a clean. Generally the wiper either gets corrosion on it or it's just general dirt buildup (use switch cleaner or my preferred method of ipa). They are usually very easy to take apart by bending a couple of clips that you can easily bend back afterwards.
Good luck finding a replacement if you have to, as spare parts are now very few and far between unless you buy used, which comes with its own potential problems.

Good luck
M0CNL


On Mon, Dec 19, 2022 at 1:44 PM gw3fsp via <gw3fsp.ldavies=[email protected]> wrote:
I had that problem, try cleaning the track in the pot, dribble some cleaner (alcohol say) down the shaft with the set on it's back with the knob off, if that does not work it's a replacement pot usually.
Leighton.? ? ?GW3FSP.
Re: Squelch at FM mode works not correct

 

I had that problem, try cleaning the track in the pot, dribble some cleaner (alcohol say) down the shaft with the set on it's back with the knob off, if that does not work it's a replacement pot usually.
Leighton. GW3FSP.
Squelch at FM mode works not correct

 

Hi FT-847 users,

I have the problem with my FT-847 that with FM the squelch closes a
little, but when turning the knob further to the right, the squelch
opens again. If the squelch knob were a clock face and if there is no
signal on the VHF/UHF band: So if the knob starts at 7 o'clock and the
squelch closes at 8 o'clock, it opens again at about 11 o'clock and then
remains open until the right stop. With SSB everything works fine. I
would venture over with meters, oscilloscope etc if I knew where to
start. Is there a comparator or Schmitt trigger where I can start my
search? Circuit diagram is available.

Thanks for reading!

73, Tom, DJ6TB
Re: CatRadio - Radio Control Software #software

 

Very useful Thanks

BR

Andrew

Get

Re: CatRadio - Radio Control Software #software

 

CatRadio?1.3.0?is now available for download?

Main changes:
  • Radio info
  • Dark theme
  • MIC levels
  • NB2
  • Meter COMP, ID, VDD
  • Yaesu band stack
  • Hamlib 4.5
  • Bug fixes and various GUI and code improvements
Re: TX/RX same band in Satellite mode

 

I am having the same problem now that GREENCUBE is on my RADAR.? Tonight I figured out that I can operate regular, non SAT mode, and go SPLIT.? ?The PstRotator controls the receive doppler and I can manually adjust the TX with the SUB-TUNE.
Re: FT847 RA0070300 SHEET Satellite label

 

Hello Spence and Dave,
Yes it's the plastic decal for the Sat control.
Regards

Stuart Vk5ade

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Spence M0STO via groups.io
Sent: Tuesday, November 22, 2022 2:10 AM
To: [email protected]
Subject: Re: [YaesuFT847] FT847 RA0070300 SHEET Satellite label

I think it’s the stick on plastic decal about the Sat controls.?

De Spence M0STO

Sent while portable! please excuse typos.

On 21 Nov 2022, at 14:57, Dave Price via groups.io <jt2ma70@...> wrote:

Hi, Stuart,

I'm not sure what you are seeking recently.
I acquired an FT-847 and it came with copies of the Operating Manual and Technical Manual. Could you please explain what I should look for?

BTW, the radio has a lot of features and I sure would like to find a YouTube video about basic operating. If you know of one, please share.

73, Dave W4QDV




Capture.PNG

Re: FT847 RA0070300 SHEET Satellite label

 

I think it’s the stick on plastic decal about the Sat controls.?

De Spence M0STO

Sent while portable! please excuse typos.

On 21 Nov 2022, at 14:57, Dave Price via groups.io <jt2ma70@...> wrote:

Hi, Stuart,

Im not sure what you are seeking recently.
I acquired an FT-847 and it came with copies of the Operating Manual and Technical Manual. Could you please explain what I should look for?

BTW, the radio has a lot of features and I sure would like to find a YouTube video about basic operating. If you know of one, please share.

73, Dave W4QDV




Re: FT847 RA0070300 SHEET Satellite label

 

Hi, Stuart,

Im not sure what you are seeking recently.
I acquired an FT-847 and it came with copies of the Operating Manual and Technical Manual. Could you please explain what I should look for?

BTW, the radio has a lot of features and I sure would like to find a YouTube video about basic operating. If you know of one, please share.

73, Dave W4QDV
FT847 RA0070300 SHEET Satellite label

 

Hello Group,

I am new to this group.

I am trying to track down a FT847 RA0070300 SHEET this is the Satelite label.

I moved QTH some time ago and it came of in transit.

It is only a cosmetic issue but would still like to find one.

The Transceiver functions OK

I have tried some local dealers in VK but no help.

Can somebody please advise where I might find one.

Regards

Stuart Vk5ade
Re: TX/RX same band in Satellite mode

 

开云体育

To add to that, do not attempt to work the satellites until you can hear your own voice coming down from the satellite.

?

Bill

K2WH

?

From: [email protected] [mailto:[email protected]] On Behalf Of Joseph LaFerla
Sent: Sunday, November 20, 2022 8:00 AM
To: [email protected]
Subject: Re: [YaesuFT847] TX/RX same band in Satellite mode

?

I used to use an ft847 and the sat mode is a special mode designed to be used only when doing qso’s via satellite.? The mode provides automatic frequency tracking to track the satellites as they traverse the sky so you don’t have to do manual tracking.? It made tracking the satellites effortless.? Of course you still had to use satellite tracking software on your computer.? The full duplex meant that you could hear and talk to the satellite at the same time.? Check this out on the net.? There’s lots of information on it.

?

73

Joe VA3TV

?

?

?

?

Sent from for Windows

?

From: Frank
Sent: November 20, 2022 6:11
To: [email protected]
Subject: Re: [YaesuFT847] TX/RX same band in Satellite mode

?

HI Andy
Needless to put it in SAT if on the same band, at most use VFO A and B and not SAT mode.

?

Is there any option in SAT mode that you would miss in normal mode except full duplex which on the same band without various filters or notches (cavity filters) would be difficult to manage positively?

73

?


--
Bill, K2WH
Re: TX/RX same band in Satellite mode

 

开云体育

I used to use an ft847 and the sat mode is a special mode designed to be used only when doing qso’s via satellite.? The mode provides automatic frequency tracking to track the satellites as they traverse the sky so you don’t have to do manual tracking.? It made tracking the satellites effortless.? Of course you still had to use satellite tracking software on your computer.? The full duplex meant that you could hear and talk to the satellite at the same time.? Check this out on the net.? There’s lots of information on it.

?

73

Joe VA3TV

?

?

?

?

Sent from for Windows

?

From: Frank
Sent: November 20, 2022 6:11
To: [email protected]
Subject: Re: [YaesuFT847] TX/RX same band in Satellite mode

?

HI Andy
Needless to put it in SAT if on the same band, at most use VFO A and B and not SAT mode.

?

Is there any option in SAT mode that you would miss in normal mode except full duplex which on the same band without various filters or notches (cavity filters) would be difficult to manage positively?

73

?

CF439C19E89145F8B5B28EE4A5BDB40C.png

Re: TX/RX same band in Satellite mode

 

You'd have to run in split mode if you want tx/rx on the same band.
Re: TX/RX same band in Satellite mode

 

开云体育

On VHF the cavities are the size of beer barrels! And you would need 4-6 depending on split

?

From: [email protected] [mailto:[email protected]] On Behalf Of Frank
Sent: 20 November 2022 11:12
To: [email protected]
Subject: Re: [YaesuFT847] TX/RX same band in Satellite mode

?

HI Andy
Needless to put it in SAT if on the same band, at most use VFO A and B and not SAT mode.

?

Is there any option in SAT mode that you would miss in normal mode except full duplex which on the same band without various filters or notches (cavity filters) would be difficult to manage positively?

73
Re: TX/RX same band in Satellite mode

 

HI Andy
Needless to put it in SAT if on the same band, at most use VFO A and B and not SAT mode.
?
Is there any option in SAT mode that you would miss in normal mode except full duplex which on the same band without various filters or notches (cavity filters) would be difficult to manage positively?

73
Re: TX/RX same band in Satellite mode

 

开云体育

Not at the same time.


On 2022-11-19 07:28 PM, EI8KF wrote:

Is it possible to transmit and receive in the same band when in Satellite mode?

Thanks,
Andy

TX/RX same band in Satellite mode

 

Is it possible to transmit and receive in the same band when in Satellite mode?

Thanks,
Andy
Re: RX-only HF mod?

 

Thanks guys, sounds like it might not be worth the trouble. The idea is to use a secondary receiver with the 3000, not instead of it. Why? Might be handy in contests, but mostly just because it’s possible ?

It will probably be easier and safer to just use a dedicated receiver for this.?
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