Re: FT-847 IN TX ALL TIMES
Nice circuit, but it's slightly cropped.? The two plugs on the
right...? The top one goes to the TRS Data I/O port; where does the
lower one go, and what is the rest of the "USE THIS F..." text??
Seems to be important...
Greg? KO6TH
Ian M via groups.io wrote:
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This is what have been using for the last 25
years with the FT-847 with various data modes in both SSB
& FM including FT-8
Credit goes to ( I think) Jim Barber N7CXI who
co-wrote W95SSTV which it was initially designed for.
Hope it helps
I've used my FT-847 on both 6 and 2M, no
problem.? Just used the sample interface circuit in the
manual.??
73,
Tom K6EU
MAN, you guys are good
!!!!..? Very obvious thing overlooked. HI.? All good
now.? I had schematics out last night trying to figure
out what components could be bad.? You made my day.? Any
of you using something for FT8?? I had it receiving FT8
through the DATA IN/OUT plug but was trying to get
transmit working.? I notice there was a claim that the
DATA IN/OUT only worked on HF and I wanted it for 6 M.
Probably have to go into mic jack for that and PTT.? Any
units on the market that do that?? Have not looked.? 73
Mike K4PI
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Re: FT-847 IN TX ALL TIMES
Quite agree this would be an improvement.? I used a 4N25 optocoupler on my FT-100 interface (that has a slightly different configuration) and still use it today with the FT817
Built several of these over?the years for myself and friends each one more nearer than the previous one.?
It works both for SSB and FM and doesn't affect the CAT interface if you are not using the matching FC-20 auto atu.?
On Thu, 6 Jun 2024, 15:53 Spence G5STO via , <unavailable.equal= [email protected]> wrote: Hi Ian, that’s a beautiful circuit and could only be improved by replacing the 2N2222 with a 4N33.
De Spence G5STO
Sent while portable! please excuse typos. ? This is what have been using for the last 25 years with the FT-847 with various data modes in both SSB & FM including FT-8
Credit goes to ( I think) Jim Barber N7CXI who co-wrote W95SSTV which it was initially designed for.
Hope it helps
I've used my FT-847 on both 6 and 2M, no problem.? Just used the sample interface circuit in the manual.??
73,
Tom K6EU
MAN, you guys are good !!!!..? Very obvious thing overlooked. HI.? All good now.? I had schematics out last night trying to figure out what components could be bad.? You made my day.? Any of you using something for FT8?? I had it receiving FT8 through the DATA IN/OUT plug but was trying to get transmit working.? I notice there was a claim that the DATA IN/OUT only worked on HF and I wanted it for 6 M. Probably have to go into mic jack for that and PTT.? Any units on the market that do that?? Have not looked.? 73 Mike K4PI
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Re: FT-847 IN TX ALL TIMES
Hi Ian, that’s a beautiful circuit and could only be improved by replacing the 2N2222 with a 4N33.
De Spence G5STO
Sent while portable! please excuse typos.
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Show quoted text
On 6 Jun 2024, at 15:42, Ian M via groups.io <nightflyian@...> wrote:
? This is what have been using for the last 25 years with the FT-847 with various data modes in both SSB & FM including FT-8
Credit goes to ( I think) Jim Barber N7CXI who co-wrote W95SSTV which it was initially designed for.
Hope it helps
I've used my FT-847 on both 6 and 2M, no problem.? Just used the sample interface circuit in the manual.??
73,
Tom K6EU
MAN, you guys are good !!!!..? Very obvious thing overlooked. HI.? All good now.? I had schematics out last night trying to figure out what components could be bad.? You made my day.? Any of you using something for FT8?? I had it receiving FT8 through the DATA IN/OUT plug but was trying to get transmit working.? I notice there was a claim that the DATA IN/OUT only worked on HF and I wanted it for 6 M. Probably have to go into mic jack for that and PTT.? Any units on the market that do that?? Have not looked.? 73 Mike K4PI
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Re: FT-847 IN TX ALL TIMES
This is what have been using for the last 25 years with the FT-847 with various data modes in both SSB & FM including FT-8
Credit goes to ( I think) Jim Barber N7CXI who co-wrote W95SSTV which it was initially designed for.
Hope it helps
I've used my FT-847 on both 6 and 2M, no problem.? Just used the sample interface circuit in the manual.??
73,
Tom K6EU
MAN, you guys are good !!!!..? Very obvious thing overlooked. HI.? All good now.? I had schematics out last night trying to figure out what components could be bad.? You made my day.? Any of you using something for FT8?? I had it receiving FT8 through the DATA IN/OUT plug but was trying to get transmit working.? I notice there was a claim that the DATA IN/OUT only worked on HF and I wanted it for 6 M. Probably have to go into mic jack for that and PTT.? Any units on the market that do that?? Have not looked.? 73 Mike K4PI
|
Re: FT-847 IN TX ALL TIMES
I've used my FT-847 on both 6 and 2M, no problem.? Just used the sample interface circuit in the manual.??
73,
Tom K6EU
MAN, you guys are good !!!!..? Very obvious thing overlooked. HI.? All good now.? I had schematics out last night trying to figure out what components could be bad.? You made my day.? Any of you using something for FT8?? I had it receiving FT8 through the DATA IN/OUT plug but was trying to get transmit working.? I notice there was a claim that the DATA IN/OUT only worked on HF and I wanted it for 6 M. Probably have to go into mic jack for that and PTT.? Any units on the market that do that?? Have not looked.? 73 Mike K4PI
|
Re: FT-847 IN TX ALL TIMES
MAN, you guys are good !!!!..? Very obvious thing overlooked. HI.? All good now.? I had schematics out last night trying to figure out what components could be bad.? You made my day.? Any of you using something for FT8?? I had it receiving FT8 through the DATA IN/OUT plug but was trying to get transmit working.? I notice there was a claim that the DATA IN/OUT only worked on HF and I wanted it for 6 M. Probably have to go into mic jack for that and PTT.? Any units on the market that do that?? Have not looked.? 73 Mike K4PI
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Re: FT-847 IN TX ALL TIMES
Check to insure the MOX?button is not pushed in.? ?The MOX button is right under the power switch, easy to push by mistake.
73,
Tom K6EU
You didn't by any chance bump the MOX switch on the front?
Greg? KO6TH
K4PI via wrote:
I have a 847 that had been
working fine until I started tinkering with the DATA IN/OUT
jack trying to interface a computer.? Now when I turn power on
it is in TX continually and cannot get it out? Nothing but DC
power and antenna connected.? Think something got blown on
that circuit.? Unable to make any changes. Anyone every
working in that area.? 73 Mike K4PI
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Re: FT-847 IN TX ALL TIMES
You didn't by any chance bump the MOX switch on the front?
Greg? KO6TH
K4PI via groups.io wrote:
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I have a 847 that had been
working fine until I started tinkering with the DATA IN/OUT
jack trying to interface a computer.? Now when I turn power on
it is in TX continually and cannot get it out? Nothing but DC
power and antenna connected.? Think something got blown on
that circuit.? Unable to make any changes. Anyone every
working in that area.? 73 Mike K4PI
|
I have a 847 that had been
working fine until I started tinkering with the DATA IN/OUT jack
trying to interface a computer.? Now when I turn power on it is
in TX continually and cannot get it out? Nothing but DC power
and antenna connected.? Think something got blown on that
circuit.? Unable to make any changes. Anyone every working in
that area.? 73 Mike K4PI
|
Dear Stanley, ? I good suction desoldering tool will help here to get as much solder off as possible, there are two ways, I find with a broad soldering tip and an iron of around 60-80 watts, flux the area and use a surgical scalpel to get under each leg and lift up, it gets easier the more legs you lift up, take it slow and steady, sometimes it helps to add a bit of fluxed fresh solder. ? If this does not work then there is insufficient heat from your iron, so stop, for example use a temp controlled iron like a Weller 1201A or WPS80, ? The second way is to cut the body of the transistor out then lift the legs, this depends on how much clearance you have? ? Make a note of any other component soldered close by, there are often base emitter and base collector caps to neutralise inductance. ? The 847 PA transistors are quite robust are you sure they are dead, ?check the bias set up procedure, the transistor bios pots have been known to fail, do you have 0.6 to 0.7V on the base of the PA transistors ? ? The previous stages are FET, so some 3-4Volts ? 73 ? Andrew G8UUG ?
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From: [email protected] <[email protected]> On Behalf Of Stanley Engel
Sent: 02 June 2024 16:05
To: [email protected]
Subject: [YaesuFT847] ftm100 PA? what is a good procedure for removing the PA from the FTM100 motherboard? I have used solder wick to remove most of the solder but of course it is still attached. I have no special tools for that. Any ideas?
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1)? At a bare minimum you need a hot air rework station.?
2)? Better is a hot air rework station and a PCB preheater.?
3)? Best is what I use which is a automated computer controlled rework station that runs through a stepped temperature PCB preheater cycle, stepped temperature reflow and automated suction pic of the part off the board.? Once set up it's a fully automated process.? After PCB cleaning it does basically the same but in reverse and after the new part has been reflowed onto the PCB goes through a stepped down cooling cycle.? It's the same machine I use for replacing BGA processor chips.
No matter what you use make sure you don't use more heat than needed or you risk damaging the PCB or thermally damaging the component.
Mikes Radio Repair
KC3OSD
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what is a good procedure for removing the PA from the FTM100 motherboard? I have used solder wick to remove most of the solder but of course it is still attached. I have no special tools for that. Any ideas?
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Re: C1200 on AF-CTRL board
Thank you very much for this info, A65BR Oleg.
You are rigth, the capacitor is C1280, see attached photo.
Thanks, OZ1BXM Lars?
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Re: C1200 on AF-CTRL board
Near Q1107 opposite pins 13,14 located C1280 0,0022 mkF 50V ?
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From: [email protected] < [email protected]> On Behalf Of oz1bxm_lars_petersen via groups.io Sent: Thursday, May 16, 2024 12:49 To: [email protected]Subject: [YaesuFT847] C1200 on AF-CTRL board ? Hello group,
I've replaced the chip Q1107 on the AF-CTRL board, but I lost C1200 (sits near Q1107), and I cannot find a parts list for FT-847.
Does anyone know the value of C1200 on the AF-CTRL board?
Thank you.
OZ1BXM Lars
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Re: C1200 on AF-CTRL board
Hi Lars I have Tech Supplement, C1200 on AF-CNTL Unit has 0,01 mkF 25V Tol B, Yaesu p/n K22144802 ? 73 Oleg A65BR ? ?
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From: [email protected] < [email protected]> On Behalf Of oz1bxm_lars_petersen via groups.io Sent: Thursday, May 16, 2024 12:49 To: [email protected]Subject: [YaesuFT847] C1200 on AF-CTRL board ? Hello group,
I've replaced the chip Q1107 on the AF-CTRL board, but I lost C1200 (sits near Q1107), and I cannot find a parts list for FT-847.
Does anyone know the value of C1200 on the AF-CTRL board?
Thank you.
OZ1BXM Lars
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Re: C1200 on AF-CTRL board
HI Lars ? I could find Q1107 on the schematic diagram, maybe you can find C1200 ? if I see C1200 is around pin 12/13/14 of Q1107 ? ? Good Luck ? Sjoerd PA3DOL ? 
?
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From: [email protected] <[email protected]> On Behalf Of oz1bxm_lars_petersen via groups.io
Sent: donderdag 16 mei 2024 10:49
To: [email protected]
Subject: [YaesuFT847] C1200 on AF-CTRL board ? Hello group,
I've replaced the chip Q1107 on the AF-CTRL board, but I lost C1200 (sits near Q1107), and I cannot find a parts list for FT-847.
Does anyone know the value of C1200 on the AF-CTRL board?
Thank you.
OZ1BXM Lars
|
Hello group,
I've replaced the chip Q1107 on the AF-CTRL board, but I lost C1200 (sits near Q1107), and I cannot find a parts list for FT-847.
Does anyone know the value of C1200 on the AF-CTRL board?
Thank you.
OZ1BXM Lars
|
Re: FT-847 use with transverter for 144 MHz from 28MHz
At this point, the transmit level needs to be 5 Watts (+37 dBm) for driving my current transverter(s).
So, just using the normal output, not any taps internal to the rig.
--
Cam, W4XXV
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Re: FT-847 use with transverter for 144 MHz from 28MHz
Was the plan to use 0db as the drive level, if so the lpf issue won't be a problem because your bypassing the PA
I should have added? "and other transverters".
I also want to make use of 222 MHz as well, requiring the use of 28-31 MHz transmit.
So, the question still stands.
--
Cam, W4XXV
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Re: FT-847 use with transverter for 144 MHz from 28MHz
I should have added? "and other transverters".
I also want to make use of 222 MHz as well, requiring the use of 28-31 MHz transmit.
So, the question still stands.
--
Cam, W4XXV
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Ian M
Spence G5STO
Andrew Lenton
Mike KC3OSD
oz1bxm_lars_petersen
