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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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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
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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
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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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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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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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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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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
|
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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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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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 à 16:23:58 UTC+1, Jeff M0UHF <jeff.elliott45@...> a écrit :
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
|
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
|
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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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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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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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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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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Jeff M0UHF
Andy Bosworth
Spence G5STO
Andrew Lenton