FT-847 Won't Work in SAT Mode
Hello, ? I have an 847 that won't transmit while in SAT Mode.? The radio works fine in all modes, bands and powers at half-duplex and in split mode but when in SAT Mode, the radio won't transmit.? ? Any thoughts or ideas would be appreciated.? ? ? '73, ? John N2HMM ?
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Re: FT-847 Transmit Problem
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From: [email protected] [mailto:[email protected]] On Behalf Of Andy Bosworth
Sent: 15 January 2023 02:52
To: [email protected]
Subject: Re: [YaesuFT847] FT-847 Transmit Problem ? I would respectfully suggest that people are jumping to conclusions without logical thinking.
Perhaps if the original poster bothered to read answers, it may help.
I have asked what size PSU he is using, as did another, but no reply.
I asked if it did it on FM, no reply.
It is displaying symptoms of drawing too much current, hence my questions.?
If PSU is too low a capacity, it will cut out. FM being a full current mode, it will cut out. Ignore the FT8, go back to basics and fault find. Put the radio on a dummy load, connected to a known good PSU, and try it again.
You could even check the power lead for dirty fuses or connections, as that is known to cause problems. ? Yes, I agree, the power on switches are known as a fault on many radios and would cause this problem. Not that I¡¯ve ever had one fail on me like that. But if there was a problem with that, you would have an idea how it felt and behaved. ?I've seen that symptom sometimes on the 847's when the power switch is becoming intermittent.
They are a known failure item.
Doug
N7BFS
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Re: FT-847 Transmit Problem
Hi, I'm just picking up on this thread but I've had a similar problem before.... the two screw terminals that clamp down the incoming cable inside the FT847 are prone to working loose. Also inline fuses that are badly made off can offer a significant voltage drop.
thats my 2p worth.
de Spence M0STO
On Sun, Jan 15, 2023 at 2:52 AM Andy Bosworth < sidthepop@...> wrote: I would respectfully suggest that people are jumping to conclusions without logical thinking.
Perhaps if the original poster bothered to read answers, it may help.
I have asked what size PSU he is using, as did another, but no reply.
I asked if it did it on FM, no reply.
It is displaying symptoms of drawing too much current, hence my questions.?
If PSU is too low a capacity, it will cut out. FM being a full current mode, it will cut out. Ignore the FT8, go back to basics and fault find. Put the radio on a dummy load, connected to a known good PSU, and try it again.
You could even check the power lead for dirty fuses or connections, as that is known to cause problems.
Yes, I agree, the power on switches are known as a fault on many radios and would cause this problem. Not that I¡¯ve ever had one fail on me like that. But if there was a problem with that, you would have an idea how it felt and behaved.
Sent from Jeff M0UHF?
?I've seen that symptom sometimes on the 847's when the power switch is becoming intermittent.
They are a known failure item.
Doug
N7BFS
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Re: FT-847 Transmit Problem
I would respectfully suggest that people are jumping to conclusions without logical thinking.
Perhaps if the original poster bothered to read answers, it may help.
I have asked what size PSU he is using, as did another, but no reply.
I asked if it did it on FM, no reply.
It is displaying symptoms of drawing too much current, hence my questions.?
If PSU is too low a capacity, it will cut out. FM being a full current mode, it will cut out. Ignore the FT8, go back to basics and fault find. Put the radio on a dummy load, connected to a known good PSU, and try it again.
You could even check the power lead for dirty fuses or connections, as that is known to cause problems.
Yes, I agree, the power on switches are known as a fault on many radios and would cause this problem. Not that I¡¯ve ever had one fail on me like that. But if there was a problem with that, you would have an idea how it felt and behaved.
Sent from Jeff M0UHF?
?I've seen that symptom sometimes on the 847's when the power switch is becoming intermittent.
They are a known failure item.
Doug
N7BFS
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Re: FT-847 Transmit Problem
Yes, I agree, the power on switches are known as a fault on many radios and would cause this problem. Not that I¡¯ve ever had one fail on me like that. But if there was a problem with that, you would have an idea how it felt and behaved.
Sent from Jeff M0UHF?
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On 14 Jan 2023, at 17:50, Doug via groups.io <rinsewind79@...> wrote:
?I've seen that symptom sometimes on the 847's when the power switch is becoming intermittent.
They are a known failure item.
Doug
N7BFS
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Re: FT-847 Transmit Problem
I've seen that symptom sometimes on the 847's when the power switch is becoming intermittent.
They are a known failure item.
Doug
N7BFS
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Re: FT-847 Transmit Problem
That sounds like a power supply problem to me. Possibly only able to supply about 5A instead of 25-30A
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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
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Re: FT-847 Transmit Problem
Phil, I anticipated the problems, because at my old qth had bad swr and it was danger, that make me another problems.
Yvan HB9CSM
Le vendredi, 13 janvier 2023 ¨¤ 16:23:58 UTC+1, Jeff M0UHF <jeff.elliott45@...> a ¨¦crit :
Why would it matter what you have connected to it unless you are using a PC connection onto items as I said previously. The only other thing is RF getting back to the Radio, depending on your set up. This will shut your radio down, especially with something
like FT8 & fm which is full duty cycle. It might be better if you do a drawing and show your set up what you are actually using and how are you doing it. You will know if it¡¯s the internal battery, because if you change any settings you will lose them so you
can rule this out if it doesn¡¯t happen. ?
Sent from Jeff M0UHF?
On 13 Jan 2023, at 15:10, Andy Bosworth <sidthepop@...> wrote:
?
Does it have the same symptoms without all the FT8 stuff connected? Does it cut out on FM?
Also, I have had this radio cut out on me, when the 3v backup battery is failing or failed. And the only way I could make it work was by doing a full reset each time, and then everything works as it should, for a short time, it would read all
sorts of weird things and then it would finally give up the ghost & fail with error.?
Sent from Jeff M0UHF?
?Hello Phil,
you have perhaps enter HF to your 847, put the ferrit rods and some tours of cables on all enter cables, I use it from beginning and no problem.
73
--
Yvan
--
Yvan
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Re: FT-847 Transmit Problem
Why would it matter what you have connected to it unless you are using a PC connection onto items as I said previously. The only other thing is RF getting back to the Radio, depending on your set up. This will shut your radio down, especially with something
like FT8 & fm which is full duty cycle. It might be better if you do a drawing and show your set up what you are actually using and how are you doing it. You will know if it¡¯s the internal battery, because if you change any settings you will lose them so you
can rule this out if it doesn¡¯t happen. ?
Sent from Jeff M0UHF?
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Show quoted text
On 13 Jan 2023, at 15:10, Andy Bosworth <sidthepop@...> wrote:
?
Does it have the same symptoms without all the FT8 stuff connected? Does it cut out on FM?
Also, I have had this radio cut out on me, when the 3v backup battery is failing or failed. And the only way I could make it work was by doing a full reset each time, and then everything works as it should, for a short time, it would read all
sorts of weird things and then it would finally give up the ghost & fail with error.?
Sent from Jeff M0UHF?
?Hello Phil,
you have perhaps enter HF to your 847, put the ferrit rods and some tours of cables on all enter cables, I use it from beginning and no problem.
73
--
Yvan
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Re: FT-847 Transmit Problem
Does it have the same symptoms without all the FT8 stuff connected? Does it cut out on FM?
Also, I have had this radio cut out on me, when the 3v backup battery is failing or failed. And the only way I could make it work was by doing a full reset each time, and then everything works as it should, for a short time, it would read all sorts of weird
things and then it would finally give up the ghost & fail with error.?
Sent from Jeff M0UHF?
?Hello Phil,
you have perhaps enter HF to your 847, put the ferrit rods and some tours of cables on all enter cables, I use it from beginning and no problem.
73
--
Yvan
|
Re: FT-847 Transmit Problem
Also, I have had this radio cut out on me, when the 3v backup battery is failing or failed. And the only way I could make it work was by doing a full reset each time, and then everything works as it should, for a short time, it would read all sorts of weird
things and then it would finally give up the ghost & fail with error.?
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Show quoted text
On 13 Jan 2023, at 08:40, yvan skopek via groups.io <yvskop@...> wrote:
?Hello Phil,
you have perhaps enter HF to your 847, put the ferrit rods and some tours of cables on all enter cables, I use it from beginning and no problem.
73
--
Yvan
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Re: FT-847 Transmit Problem
Hello Phil,
you have perhaps enter HF to your 847, put the ferrit rods and some tours of cables on all enter cables, I use it from beginning and no problem.
73
--
Yvan
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Re: FT-847 Transmit Problem
What size psu are you using?
If you are using or sharing the same connection to the computer and the external tuner this could happen. You can buy a device which helps to share the data using that socket for the tuner.
Sent from Jeff M0UHF
> On 12 Jan 2023, at 18:30, Phil Stanley via <kd2xn=[email protected]> wrote:
>
> ?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
>
>
>
>
>
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Re: FT-847 Transmit Problem
If you are using or sharing the same connection to the computer and the external tuner this could happen. You can buy a device which helps to share the data using that socket for the tuner.
Sent from Jeff M0UHF
toggle quoted message
Show quoted text
On 12 Jan 2023, at 18:30, Phil Stanley via groups.io <kd2xn@...> wrote:
?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
|
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
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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:
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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.
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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
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.
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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.
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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
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Re: CatRadio - Radio Control Software
#software
Very useful Thanks
BR
Andrew
Get
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Andrew Lenton
Spence G5STO
Andy Bosworth
Jeff M0UHF
Jeff M0UHF
Andy Bosworth
gw3fsp
Andrew Lenton