How are you keying the rig?? If you key the rig with CAT, the audio
needs to come in from the mike plug in the front.? Key the rig via
the TRS jack, feeding audio in to the same, and it should work.?
Similarly, if you are doing VHF/UHF packet, key the rig and feed
audio into the DIN port.? For the TRS port, you'll need a resistor
and DC-blocking cap to merge the audio and PTT signals; it's the
same "interface" as is often used to interface to an HT.? The DIN
port has separate PTT and Audio pins, but it's for FM Packet.
For some unknown reason, keying the rig via CAT takes the audio from
the mike input, which is probably the least useful place to take it
from.
Greg? KO6TH
HI8RMQ via groups.io wrote:
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I have seen some 847 with the same problem, and there's a
common thing, they all where using some interface for FT8.
Maybe an excesive audio or impedance problems, I dont know,
fry something related to the modulation stage. There is a
carrier, algo works in 2m, but in HF is gone, so SSB obvioulsy
wont work. Have a tech friend with 3 847 with the same problem
and cant proceed properly because cant find a decent service
manual. Any help will be appreciated.
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I have seen some 847 with the same problem, and there's a common thing, they all where using some interface for FT8.
Maybe an excesive audio or impedance problems, I dont know, fry something related to the modulation stage. There is a carrier, algo works in 2m, but in HF is gone, so SSB obvioulsy wont work. Have a tech friend with 3 847 with the same problem and cant proceed properly because cant find a decent service manual. Any help will be appreciated.
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File /FT-847 Manuals/Corrections SM page 3-4.pdf uploaded
#file-notice
The following files and folders have been uploaded to the Files area of the [email protected] group.
By: Erik Rothuis <erothuis@...>
Description:
Correction and additional info on service manual page 3-4, about FM IF Adjustment and Carrier Frequency Adjustment
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Sounds like it is working
73
Andrrw
?Get BlueMail for Android ?
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On 10 Aug 2024, 20:36, at 20:36, Erik Rothuis <erothuis@...> wrote: I am repairing a FT847 from a fellow amateur. How is complaining on
broken-up audio, on more then 50 Watt HF. First we thought of RFI
coming back to the mic, but that was not the case, because it happend
on more antennas.
Now i have the transceiver here, in mij workshop. I found out that on
his power cord, he had 2 banana plugs, one cheep one, and a good one.
The cheep was very loose in the socket, and was not cooping with the
power, so there was a powerdrop of more than 3 volt. I changed the
banana plug and the transceiver is working fine now.
What i found was that the ALC meter never exceeded above the? max
limit, even with compressor on. Is that normal on a 847?
--
Greetings from Erik Rothuis (PA2ER), Terborg Netherlands.
|
I am repairing a FT847 from a fellow amateur. How is complaining on broken-up audio, on more then 50 Watt HF. First we thought of RFI coming back to the mic, but that was not the case, because it happend on more antennas.
Now i have the transceiver here, in mij workshop. I found out that on his power cord, he had 2 banana plugs, one cheep one, and a good one. The cheep was very loose in the socket, and was not cooping with the power, so there was a powerdrop of more than 3 volt. I changed the banana plug and the transceiver is working fine now.
?
What i found was that the ALC meter never exceeded above the? max limit, even with compressor on. Is that normal on a 847?
?
--
Greetings from Erik Rothuis (PA2ER), Terborg Netherlands.
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Re: Serial cable question
?Hi Ron, ? ? ? ? ? ? To turn off CAT you just need to send 0x00 0x00 0x00 0x00 0x80 and that should turn off the CAT.?
? I’m now starting to get a feeling about this and wondered if you have an FC20 or other tuner “Yaesu or LDG” connected? Unfortunately, Yaesu made a slight error in judgement and it meant CAT and tuner shared the same part of the communications BUS. I was looking at a schematic last night (terrible quality) and saw the 9 pin connection for the D Sub and it as I suspected, goes to what appears to be a MAX232. There are lines tied together internally as would be expected to DCD etc. to DTR and RTS won’t do anything EVER, as only 2 pins and ground tie into the MAX232 and CPU. Unfortunately, Yaesu used a FIFO (first in first out) which meant Tuner took priority over CAT and neither worked correctly when the other was plugged in. I just want to eliminate that.
? Secondly, I wonder if you had an early radio that just had directional comms? We can determine this by the next set of commands. I am also doing this on my radio so that I can be sure it’s A) working and B) I’ve tested the method and I’m not missing points.
? The thought here is “we’ve made big progress”. In determining if the radio does receive commands….. it does. The CAT Icom normally means “in my opinion” that command to turn off CAT are obstructed. I’ve had this hundreds of times with Ham Radio Deluxe wanting to connect as and when it likes. It’s normally down to either FIFO buffers, latency in the command or a setting issue.
? ?I think we can now safely assume that 4800baud is the next best setting. The reason? In my experience it’s more tolerant to latency and buffer problems. Faster rates I found are great to move data but poor as stability and that’s the difference between a command sent and received. You don’t see garbage on the screen! You just don’t communicate at all. So please, for now let’s quickly set 4800baud as I’ve only ever had minimal issues at this rate.
?Please don’t think I’m schooling you but I am a real PITA when it comes to remote support and I would not make a good agent on the phone. So accept my sincere apologies if that is how I’m conveying myself.
See the video and also observe the RX and TX lights blinking on RealTerm. If you only get TX then we can safely say you have either a half duplex version, the RX line is damaged in the cable or you have a Tuner connected?
de Spencer G5STO
What is the voltage at the serial port on the radio?? Measure
between pins 3 & 5.
Greg? KO6TH
Ron Liekens via wrote:
Spence,
?
I did all you proposed, and it did go well. Things reacted
the way you demonstrated. Still no luck with the other programs
like HamRadioDeluxe, FL-digi, FTBasicMMO, FTBCAT or WSJT-X. Just
like before, Rats847 will connect, but has no feedback from the
radio. Seems commands are understood by the radio and there is
no duplex communication. The display CAT icon is still on,
though.
?
73' Ron
ON2RON
|
Re: Serial cable question
What is the voltage at the serial port on the radio?? Measure
between pins 3 & 5.
Greg? KO6TH
Ron Liekens via groups.io wrote:
toggle quoted message
Show quoted text
Spence,
?
I did all you proposed, and it did go well. Things reacted
the way you demonstrated. Still no luck with the other programs
like HamRadioDeluxe, FL-digi, FTBasicMMO, FTBCAT or WSJT-X. Just
like before, Rats847 will connect, but has no feedback from the
radio. Seems commands are understood by the radio and there is
no duplex communication. The display CAT icon is still on,
though.
?
73' Ron
ON2RON
|
First thing to do is see if the parts are even in the radio.? You will frequently find parts not used.? If they are used it's frequently in a tuned circuit like a filter network.
?
What are you trying to diagnose/repair?? What is the problem your having?
|
Thanks for replay. But in the schematics that I downloaded here, the components are also marked with ***. If that meens that they are selected parts, how do you know what part to use? Because there are many parts in the schematic, with the value ***.
?--
Greetings from Erik Rothuis (PA2ER), Terborg Netherlands.
|
Re: Serial cable question
Spence,
?
I did all you proposed, and it did go well. Things reacted the way you demonstrated. Still no luck with the other programs like HamRadioDeluxe, FL-digi, FTBasicMMO, FTBCAT or WSJT-X. Just like before, Rats847 will connect, but has no feedback from the radio. Seems commands are understood by the radio and there is no duplex communication. The display CAT icon is still on, though.
?
73' Ron
ON2RON
|
Here.? Just click on the files tab.
|
I'd like to have the service manual, where can I find it?
|
Asterisk on a schematic usually indicate parts not used or that they are factory selected parts in a tuned circuit.?
|
Download the Service manual, also look for some good circuit diagrams they are on these forum.
73
Andrew away from my PC at home
?Get BlueMail for Android ?
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On 4 Aug 2024, 08:44, at 08:44, Erik Rothuis <erothuis@...> wrote: I am looking for a parts list of the hf pa unit, because in the diagram
a number of parts are marked with *** and no value. Such as R5030,
R5031, R5013, C5143, and R5038.
|
I am looking for a parts list of the hf pa unit, because in the diagram a number of parts are marked with *** and no value. Such as R5030, R5031, R5013, C5143, and R5038.
|
Re: Serial cable question
Awesome thanks.
? I just wanted to give it a try to be honest. Shame the author has gone underground as I can’t find a single live link to the program and the authors site is well and truly 404.
Kind regards,
De Spence G5STO Sent while portable! please excuse typos.
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On 3 Aug 2024, at 17:52, David Steele via groups.io <david_steele@...> wrote:
? [Edited Message Follows]
Hi , you can get a demo copy of RATS847 in the files section of this group. It works but has a "block" screen that pops up every 10 minutes or so for unregistered copies. I don't know of a way to register it anymore. WJ1I. Dave
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Re: Serial cable question
Hi , you can get a demo copy of RATS847 in the files section of this group. It works but has a "block" screen that pops up every 10 minutes or so for unregistered copies. I don't know of a way to register it anymore. WJ1I. Dave
|
Re: Serial cable question
? ? Hi Ron, ? ? ? ? ? ? It’s normal for CTS, DCD and DSR to go green so no worries there. Firstly we should try a test though and that’s a simple loop back test. You need to locate pins 2 and 3 on your cable. Please don’t think I’m trying to belittle you but I just want to get back to basics.
Bridging RX and TX will create a loop and when you type into the console both TX and RX should light up together. This also means if you type A on the screen you get AA. Or B and you get BB as the computer is simply sending back what you typed. This will eliminate cable problems, null cable for straight etc. it’s important to note that FT847 to RS232 is Null and TX and RX are crossed over in the cable….. I realise you know this but I just want to be super sure.
? The above step is only needed if your 100% certain the cable it null and you will need to enable echo of the port.
?Now we can send a simple command from the PC to the radio to turn on CAT. Without this command you won’t get the radio to do anything. In Terra Term after setting the correct baud rate and stop bits and then clicking “change”.
?Now we head across to “display” and change the character set to hex.
? Next we head over to “send” and in the top box you’re going to type this exactly as it’s written here.
0x00 0x00 0x00 0x00 0x00 - in the top send box 0x00 0x00 0x00 0x00 0x80 - in the bottom send box
?Once this has been done press “send numbers”.
This top command enables CAT and CAT should now be illuminated in the radio window above shift knob.
? If it isn’t illuminated then we can start to assume there is either a hardware problem or”mux or MAX232”
? If it does illuminate then change the writing in the upper and lower box to:
0x00 0x00 0x00 0x00 0x4E - this enables satellite 0x00 0x00 0x00 0x00 0x8E - this disables satellite.
See the images below on exactly what it should look like.
Depending on your outcome? You can now either connect up your favourite program on the assumption it’s a program setting. You should also be able to rule out a bad cable or a straight cable masquerading as a null modem cable.
? Please let me know if this helps ?
My programs BTW are; PSTRotstor - paid but brilliant software for satellite control. There’s nothing close in my opinion. FLrig, FLDigi JT65HF Ham Radio Deluxe (version 5 before it became paid for). WSJT-X etc FTcat and FTbasic (contact me for links, was paid but author retired and made all his software free). Gpredict? SatPC32 Look4Sat (Android) Log4OM
Probably others but nothing I use regularly.
Hope this helps..
Aaahhh…. If anyone knows how to obtain a copy of RATS847 as I do t think is available and software Informer just wants you to sign up for a link to when it becomes available.
?Good luck as let’s go back to basics and work from there.
Kind regards,
De Spence G5STO ??
Sent while portable! please excuse typos.
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On 3 Aug 2024, at 12:33, Ron Liekens via groups.io <r.e.liekens@...> wrote:
? Spence, with RealTerm 2.0.0.70 I see the CTS - DCD - and DSR go to green. When typing in the terminal window the TXD is flashing yellow. RXD is always blank.
?
Mind you, I do not know this program and am only guessing what to do.
?
David, seems that the pins are all ok.
?
73' Ron
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Re: Serial cable question
Spence, with RealTerm 2.0.0.70 I see the CTS - DCD - and DSR go to green. When typing in the terminal window the TXD is flashing yellow. RXD is always blank.
?
No frequency is shown on the terminal.
?
Mind you, I do not know this program and am only guessing what to do.
?
David, seems that the pins are all ok.
?
73' Ron
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Re: Serial cable question
+1 for this test.
If you have a volt meter, it might be instructive just to measure
what the radio is putting out on the serial out line.? It might
reveal a bad serial port driver on the radio, or a bad cable or
connectors.? Just sitting there, it should be something around -9
volts.? Measure between pins 3 & 5 on the radio, pin 5 being
ground, or pins 2 & 5 on the USB adapter end of the cable
(because of the null-modem swap).
Greg? KO6TH
Spence G5STO via groups.io wrote:
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?
Ok try this,
? ? ? ? ? ? ? ? ? ?Ensure the radio is set to 9600 baud.
Open Terra Term (free download). Select the right port and
open the terminal. Select satellite mode on the radio. If
you’re sure you have everything set correctly then you should
at least see some garbage come up on the screen.? Set the
switch on Terra Term HEX and you should see the frequency of
the radio and sub VFO in the HEX.
? I will make a YouTube private video and post it here if
I’m making a hash of explaining things.
? Let me know if any of the simulated LED’s on the side are
blinking, eg: RX? TX?.
? De Spence G5STO
Sent while portable! please excuse typos.
?
[Edited Message Follows]
I tried several FTDI chip serial converters with or
without null-modem cables. The coms are 9600, 8,n,2 with
or without dtr-rts activated. Seems there is no reply
from the radio when connected. RATS847 software can send
commands to the radio, like frequency changes, but when
I turn the Dial of the radio the frequency is not
changed in the program.
?
The serial number of the radio is: 9E180166.
?
I have read the manual thoroughly, and I'm fairly
used to this kind of problems with other devices. For
me, it seems that the RS-232 is not working as it
should. What can be done here? I'm thinking of a
Bluetooth interface connected to a data port of the
radio. Maybe Signal link can offer a solution with their
USB interface?
?
The intention is to use the radio for Satellite coms.
?
All suggestions are most welcome.
?
73' Ron, on2ron
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Andrew Lenton
Spence G5STO
Mike KC3OSD