The same glyph shoes three symbols in a rotation.
Nothing = standard operating mode.
Running man = tune dial at speed.
Key symbol = locked up dial. No move QRG by accident.
Back to start (nothing).
It's all in the instructions. These can be downloaded from Yaesu for free. I have one copy on the home PC and one on the cell phone (you need the powerful specs for the cell phone or zoom in). The cell phone is useful when portable.
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Thanks!? Also found on Page 22 - how to change the lock setting.
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It's in the manual, page 41.
It represents a key in a keyhole and it means you have some level of panel locking enabled.
Read the last sentence.
73, Kent K9ZTV
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On Jul 20, 2022, at 9:30 AM, AB9NN - Jon Kreski <jkreski@...> wrote:
?I have a small symbol in the bottom riight hand corner of my display.? It looks like a tiny box with an F on top of it.? Does anyone know what this is?? I thought perhaps it was the running man but it's not.? Thanks!
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Jon, Key Lock "ON" see Yaesu operating manual page 31 73 Alex OK4AS/OK1VOF Dne st 20. 7. 2022 16:30 u?ivatel AB9NN - Jon Kreski < jkreski@...> napsal:
I have a small symbol in the bottom riight hand corner of my display.? It looks like a tiny box with an F on top of it.? Does anyone know what this is?? I thought perhaps it was the running man but it's not.? Thanks!
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I have a small symbol in the bottom riight hand corner of my display.? It looks like a tiny box with an F on top of it.? Does anyone know what this is?? I thought perhaps it was the running man but it's not.? Thanks!
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Oh, yes, I did. I forgot to mention that. It didn't change anything regarding the performance.
Zack W9SZ
On Wed, Jul 20, 2022 at 1:32 AM Tom Sneden < tsneden@...> wrote: This might be a stupid idea but have you tried the factory reset? ? Well, I'm completely stymied by it now. I make a living repairing electronic equipment, some of it rather exotic and with no service manuals or schematics. But I can't figure out what's wrong with this radio. So far, I have not found any bad components, including the finals. All the voltage regulators are putting out the correct voltages.? All the voltages I can measure are correct. I just measured the HF TX, V/U TX, VTX, UTX voltages this evening and they are all correct for the correct band and mode. Whatever was smoking over the weekend just before it stopped putting out RF power on any band did not leave much of an odor. I can't detect a smell anywhere on the board. There is RF drive of the appropriate frequency going to the appropriate finals. It has all appearance of transmitting, but there is no power coming out on any band.
I sent a message to Yaesu asking if they could repair it.
73, Zack W9SZ
That's reassuring. I can't find anything wrong with that part of the circuit. And I did have the Tuner/ATAS (menu item 85) set to OFF.
I want to check the HF TX, V/U TX, VTX, UTX and 50M AMP lines next to see if they are getting activated. And the PIN diodes in the transmit chains. Hopefully something shows itself as a problem.
73, Zack W9SZ
On Tue, Jul 19, 2022 at 1:39 AM Eric van de Weyer < groups.io@...> wrote: Hi Zack, ? I believe that the circuit is actually protected against shorts as Q3013 and R3045 work as a current limit to prevent it putting too much current into the antenna. ? I think that Q3008 and Q3009 are used to select the actual voltage to put on the ANT line so one puts about 12V onto the line and the other puts a reduced voltage of around 8V onto it. My guess is that the ANCV line controls the voltage and the ANNG is feedback as to what voltage is being fed to the antenna. ? Also, if you have the antenna selection on anything except ATAS in the menu, then I think the above circuit would be inhibited as it doesn¡¯t require any voltage on the antenna cable unless ATAS is selected. ? I use a mag loop antenna on my FT897 regularly, which has a primary loop connected directly across the coax, and have no problem with it and its circuitry is basically the same as the 857. Hence I don¡¯t think the matching section on your 6 m antenna has been the cause of the problem and I think I would start looking elsewhere. ? Maybe you can literally ¡°sniff out¡± where the smoke escaped from or find the burnt component to get an idea where the problem is ? Good luck with it. ? 73¡.Eric VK2VE. ? ? That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged. I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output. ? On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
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Hi Zack, ? As you have said that you lost both 6m and 2m, which come out of different PAs (Q3022 & Q 3023 for HF/6 and Q3024 for 2/70cm) the only thing common to both of those is the 13.8V supply to them. ? If I am not mistaken, there should be a fusible link between TP3025 and TP3026 which constitute TP-E. It would normally be removed to test the output stage current during alignment. Check that the link is intact and that there is 13.8V (or whatever your supply is set to) on it. I would be looking at that link and the several inductors around it especially L3018, L 3019 & L3020, although the last two are only on the V/U side, especially L3018. Check for 13.8v on both ends of it. ? I would also check the capacitors around the same area for a possible short, especially C3119. ? ? You¡¯ve also said that you can see the correct frequencies entering the PA board (I assume at JP3001) where it then gets split into 3 by the triplexer having outputs on HF/6, 2 & 70 with HF/6 going to the HF PA and 2 & 70 going to the V/U PA. ? All this is about ? way up just to the left of centre left to right. ? Good luck. I hope you find the culprit. ? Please let me know how you go. ? ?
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From: [email protected] <[email protected]> On Behalf Of Tom Sneden
Sent: Wednesday, 20 July 2022 16:32
To: [email protected]
Subject: Re: [FT-857] CQWW VHF? This might be a stupid idea but have you tried the factory reset? ? Well, I'm completely stymied by it now. I make a living repairing electronic equipment, some of it rather exotic and with no service manuals or schematics. But I can't figure out what's wrong with this radio. So far, I have not found any bad components, including the finals. All the voltage regulators are putting out the correct voltages.? All the voltages I can measure are correct. I just measured the HF TX, V/U TX, VTX, UTX voltages this evening and they are all correct for the correct band and mode. Whatever was smoking over the weekend just before it stopped putting out RF power on any band did not leave much of an odor. I can't detect a smell anywhere on the board. There is RF drive of the appropriate frequency going to the appropriate finals. It has all appearance of transmitting, but there is no power coming out on any band. I sent a message to Yaesu asking if they could repair it. ? That's reassuring. I can't find anything wrong with that part of the circuit. And I did have the Tuner/ATAS (menu item 85) set to OFF. I want to check the HF TX, V/U TX, VTX, UTX and 50M AMP lines next to see if they are getting activated. And the PIN diodes in the transmit chains. Hopefully something shows itself as a problem. ? On Tue, Jul 19, 2022 at 1:39 AM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? I believe that the circuit is actually protected against shorts as Q3013 and R3045 work as a current limit to prevent it putting too much current into the antenna. ? I think that Q3008 and Q3009 are used to select the actual voltage to put on the ANT line so one puts about 12V onto the line and the other puts a reduced voltage of around 8V onto it. My guess is that the ANCV line controls the voltage and the ANNG is feedback as to what voltage is being fed to the antenna. ? Also, if you have the antenna selection on anything except ATAS in the menu, then I think the above circuit would be inhibited as it doesn¡¯t require any voltage on the antenna cable unless ATAS is selected. ? I use a mag loop antenna on my FT897 regularly, which has a primary loop connected directly across the coax, and have no problem with it and its circuitry is basically the same as the 857. Hence I don¡¯t think the matching section on your 6 m antenna has been the cause of the problem and I think I would start looking elsewhere. ? Maybe you can literally ¡°sniff out¡± where the smoke escaped from or find the burnt component to get an idea where the problem is ? Good luck with it. ? 73¡.Eric VK2VE. ? ? That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged. I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output. ? On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
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Hello,
I don't think Yaesu is repairing the 857D any longer. WD8BWW has been mentioned here as "the man" for display replacements. I visited him near Kansas City when he replaced my display. It turns out that he does deeper repairs, too. He had someone's huge Yaesu with lightning damage and was going through it bit by bit. Look him up on QRZ and give him a shout.
Good Luck,
Scott, KE4WMF.com
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I recently had a similar issue with another non-857 radio. Everything looked OK voltage wise, but no power out. I put together a simple RF probe and was able to follow the signal to where it quit, which turned out to be an interstage level setting pot that had opened. An RF probe is a simple way to track signals.
=Vic=
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This might be a stupid idea but have you tried the factory reset?
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On Jul 19, 2022, at 8:41 PM, Zack Widup <w9sz.zack@...> wrote:
? Well, I'm completely stymied by it now. I make a living repairing electronic equipment, some of it rather exotic and with no service manuals or schematics. But I can't figure out what's wrong with this radio. So far, I have not found any bad components, including the finals. All the voltage regulators are putting out the correct voltages.? All the voltages I can measure are correct. I just measured the HF TX, V/U TX, VTX, UTX voltages this evening and they are all correct for the correct band and mode. Whatever was smoking over the weekend just before it stopped putting out RF power on any band did not leave much of an odor. I can't detect a smell anywhere on the board. There is RF drive of the appropriate frequency going to the appropriate finals. It has all appearance of transmitting, but there is no power coming out on any band.
I sent a message to Yaesu asking if they could repair it.
73, Zack W9SZ
That's reassuring. I can't find anything wrong with that part of the circuit. And I did have the Tuner/ATAS (menu item 85) set to OFF.
I want to check the HF TX, V/U TX, VTX, UTX and 50M AMP lines next to see if they are getting activated. And the PIN diodes in the transmit chains. Hopefully something shows itself as a problem.
73, Zack W9SZ
On Tue, Jul 19, 2022 at 1:39 AM Eric van de Weyer < groups.io@...> wrote: Hi Zack, ? I believe that the circuit is actually protected against shorts as Q3013 and R3045 work as a current limit to prevent it putting too much current into the antenna. ? I think that Q3008 and Q3009 are used to select the actual voltage to put on the ANT line so one puts about 12V onto the line and the other puts a reduced voltage of around 8V onto it. My guess is that the ANCV line controls the voltage and the ANNG is feedback as to what voltage is being fed to the antenna. ? Also, if you have the antenna selection on anything except ATAS in the menu, then I think the above circuit would be inhibited as it doesn¡¯t require any voltage on the antenna cable unless ATAS is selected. ? I use a mag loop antenna on my FT897 regularly, which has a primary loop connected directly across the coax, and have no problem with it and its circuitry is basically the same as the 857. Hence I don¡¯t think the matching section on your 6 m antenna has been the cause of the problem and I think I would start looking elsewhere. ? Maybe you can literally ¡°sniff out¡± where the smoke escaped from or find the burnt component to get an idea where the problem is ? Good luck with it. ? 73¡.Eric VK2VE. ? ? That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged. I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output. ? On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
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Well, I'm completely stymied by it now. I make a living repairing electronic equipment, some of it rather exotic and with no service manuals or schematics. But I can't figure out what's wrong with this radio. So far, I have not found any bad components, including the finals. All the voltage regulators are putting out the correct voltages.? All the voltages I can measure are correct. I just measured the HF TX, V/U TX, VTX, UTX voltages this evening and they are all correct for the correct band and mode. Whatever was smoking over the weekend just before it stopped putting out RF power on any band did not leave much of an odor. I can't detect a smell anywhere on the board. There is RF drive of the appropriate frequency going to the appropriate finals. It has all appearance of transmitting, but there is no power coming out on any band.
I sent a message to Yaesu asking if they could repair it.
73, Zack W9SZ
That's reassuring. I can't find anything wrong with that part of the circuit. And I did have the Tuner/ATAS (menu item 85) set to OFF.
I want to check the HF TX, V/U TX, VTX, UTX and 50M AMP lines next to see if they are getting activated. And the PIN diodes in the transmit chains. Hopefully something shows itself as a problem.
73, Zack W9SZ
On Tue, Jul 19, 2022 at 1:39 AM Eric van de Weyer < groups.io@...> wrote: Hi Zack, ? I believe that the circuit is actually protected against shorts as Q3013 and R3045 work as a current limit to prevent it putting too much current into the antenna. ? I think that Q3008 and Q3009 are used to select the actual voltage to put on the ANT line so one puts about 12V onto the line and the other puts a reduced voltage of around 8V onto it. My guess is that the ANCV line controls the voltage and the ANNG is feedback as to what voltage is being fed to the antenna. ? Also, if you have the antenna selection on anything except ATAS in the menu, then I think the above circuit would be inhibited as it doesn¡¯t require any voltage on the antenna cable unless ATAS is selected. ? I use a mag loop antenna on my FT897 regularly, which has a primary loop connected directly across the coax, and have no problem with it and its circuitry is basically the same as the 857. Hence I don¡¯t think the matching section on your 6 m antenna has been the cause of the problem and I think I would start looking elsewhere. ? Maybe you can literally ¡°sniff out¡± where the smoke escaped from or find the burnt component to get an idea where the problem is ? Good luck with it. ? 73¡.Eric VK2VE. ? ? That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged. I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output. ? On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
|
That's reassuring. I can't find anything wrong with that part of the circuit. And I did have the Tuner/ATAS (menu item 85) set to OFF.
I want to check the HF TX, V/U TX, VTX, UTX and 50M AMP lines next to see if they are getting activated. And the PIN diodes in the transmit chains. Hopefully something shows itself as a problem.
73, Zack W9SZ
On Tue, Jul 19, 2022 at 1:39 AM Eric van de Weyer < groups.io@...> wrote: Hi Zack, ? I believe that the circuit is actually protected against shorts as Q3013 and R3045 work as a current limit to prevent it putting too much current into the antenna. ? I think that Q3008 and Q3009 are used to select the actual voltage to put on the ANT line so one puts about 12V onto the line and the other puts a reduced voltage of around 8V onto it. My guess is that the ANCV line controls the voltage and the ANNG is feedback as to what voltage is being fed to the antenna. ? Also, if you have the antenna selection on anything except ATAS in the menu, then I think the above circuit would be inhibited as it doesn¡¯t require any voltage on the antenna cable unless ATAS is selected. ? I use a mag loop antenna on my FT897 regularly, which has a primary loop connected directly across the coax, and have no problem with it and its circuitry is basically the same as the 857. Hence I don¡¯t think the matching section on your 6 m antenna has been the cause of the problem and I think I would start looking elsewhere. ? Maybe you can literally ¡°sniff out¡± where the smoke escaped from or find the burnt component to get an idea where the problem is ? Good luck with it. ? 73¡.Eric VK2VE. ? ? That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged. I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output. ? On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
|
Hi Zack, ? I believe that the circuit is actually protected against shorts as Q3013 and R3045 work as a current limit to prevent it putting too much current into the antenna. ? I think that Q3008 and Q3009 are used to select the actual voltage to put on the ANT line so one puts about 12V onto the line and the other puts a reduced voltage of around 8V onto it. My guess is that the ANCV line controls the voltage and the ANNG is feedback as to what voltage is being fed to the antenna. ? Also, if you have the antenna selection on anything except ATAS in the menu, then I think the above circuit would be inhibited as it doesn¡¯t require any voltage on the antenna cable unless ATAS is selected. ? I use a mag loop antenna on my FT897 regularly, which has a primary loop connected directly across the coax, and have no problem with it and its circuitry is basically the same as the 857. Hence I don¡¯t think the matching section on your 6 m antenna has been the cause of the problem and I think I would start looking elsewhere. ? Maybe you can literally ¡°sniff out¡± where the smoke escaped from or find the burnt component to get an idea where the problem is ? Good luck with it. ? 73¡.Eric VK2VE. ?
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From: [email protected] <[email protected]> On Behalf Of Zack Widup
Sent: Tuesday, 19 July 2022 13:27
To: [email protected]
Subject: Re: [FT-857] CQWW VHF? That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged. I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output. ? On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer <groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
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That could be. I did come to realize something. My 6 meter Yagi has a hairpin match across the input - and the coax. At DC, that would look like a short to whatever the coax is connected to. If the radio was trying to put 12 volts on the 6 meter antenna line, it would've been shorted. I can't figure out what was damaged, though. Q3006 is good. The inductors between the Q3006 collector and the HF antenna connector are OK. When I try to transmit now, there is 12 volts on the emitter of Q3006, but it doesn't turn on 12 volts to the ANT line. If it was doing that before, something was damaged.
I did verify that all the the final output transistors are OK and that there is RF drive at the correct frequencies from the MAIN board to the PA board.? The? final output transistors have 12 volts on their collectors and, on transmit, have the correct bias voltages on the base terminals. I can't figure out yet why there's no output.
73, Zack W9SZ
On Mon, Jul 18, 2022 at 8:09 PM Eric van de Weyer < groups.io@...> wrote: Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ? ? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
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Hi Zack, ? Looks to me like it¡¯s the circuit which supplies the two voltages to the HF antenna socket to drive the ATAS antenna up and down. The line labelled ANT ends up at the antenna connection on the far right and is DC coupled to it. ? 73¡.Eric VK2VE. ?
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From: [email protected] <[email protected]> On Behalf Of Zack Widup
Sent: Tuesday, 19 July 2022 02:51
To: [email protected]
Subject: Re: [FT-857] CQWW VHF? I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do? ? On Sat, Jul 16, 2022 at 6:57 PM Zack Widup <w9sz.zack@...> wrote: I went to my favorite hilltop in EN50rl for CQWW VHF, managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG), hooked everything up and it seemed to be doing fine. Antennas were working and SWR was good. I called several people over about a half an hour on 6 meters with my FT857D. None of them seemed to hear me. I was only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke come out of the rig and then no power came out. It still received OK. I checked both 50 and 144 MHz and had no power output on either band. So I took everything down and went home (a 45 minute drive). The rig did quite well up till now. I used it in the June VHF contest. I don't feel like digging into it right now to see what went bad. I'm sure I can repair it if I can get the parts. I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
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I have been looking at the service manual for the FT-857D and I may see a potential problem. I am not at home now, so I can't check things out. But on page 8 of the service manual, under the PA Unit block diagram, there is a little section labeled "Q3006, etc. 2SB1134 2SA812 2SC4154 ANT DRIVE" with an input labeled ANCV and an output labeled ANNG. The circuitry for this shows up on the schematic on page 55 close to the left side of the page, a little above the center. WHAT exactly does this part of the circuit do?
73, Zack W9SZ
On Sat, Jul 16, 2022 at 6:57 PM Zack Widup < w9sz.zack@...> wrote:
I went to my favorite hilltop in EN50rl for CQWW VHF,
managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG),
hooked everything up and it seemed to be doing fine. Antennas were
working and SWR was good. I called several people over about a half an
hour on 6 meters with my FT857D. None of them seemed to hear me. I was
only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke
come out of the rig and then no power came out. It still received OK. I
checked both 50 and 144 MHz and had no power output on either band. So I
took everything down and went home (a 45 minute drive).
The
rig did quite well up till now. I used it in the June VHF contest. I
don't feel like digging into it right now to see what went bad. I'm sure
I can repair it if I can get the parts.
I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
73, Zack W9SZ
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I have all homemade beans. They have been optimized with Yagi Optimizer. I built them so they can be transported in a car disassembled and then rapidly assembled on site. I have been using them for about 15 years.
Man, that's really a bummer.? When the magic smoke comes out it never feels (or smells) good.? Please share the failure with pictures when you get it figured out.??
Were you using some homemade beams or commercial?
Joshua
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Man, that's really a bummer.? When the magic smoke comes out it never feels (or smells) good.? Please share the failure with pictures when you get it figured out.??
Were you using some homemade beams or commercial?
Joshua
|
I went to my favorite hilltop in EN50rl for CQWW VHF,
managed to get the 6 and 2 meter Yagi antennas set up in the hot sun (the 6 meter Yagi is BIG),
hooked everything up and it seemed to be doing fine. Antennas were
working and SWR was good. I called several people over about a half an
hour on 6 meters with my FT857D. None of them seemed to hear me. I was
only running 10 watts as a QRP Portable Hilltopper. Then I saw smoke
come out of the rig and then no power came out. It still received OK. I
checked both 50 and 144 MHz and had no power output on either band. So I
took everything down and went home (a 45 minute drive).
The
rig did quite well up till now. I used it in the June VHF contest. I
don't feel like digging into it right now to see what went bad. I'm sure
I can repair it if I can get the parts.
I only had today from about 1 to 6 pm CDT to participate. I can't be on tomorrow. But I'm sad that I didn't make even one QSO.
73, Zack W9SZ
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Sorry ONLY test dont answer. Tnx & 73 Alex OK4AS
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G4IJL
AB9NN - Jon Kreski
Vic WA4THR