Does anyone have one of those rigs? I cant get it to works on 60m and 27Mhz. Have tried the options found searching and nothing. It was purchased in Japan.
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I have tried 111010, nothing.
I have a japanese model, I'd like to use 11m band. Gives me error. Any help?
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Re: If low at O/P then trace back D2016 switching?
That does not make sense, unless the UHF is banded 410 to 439 and 440 to 470 ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Max Donoghue
Sent: 23 July 2022 14:55
To: Andrew Lenton
Cc: [email protected]
Subject: Re: [YaesuFT847] If low at O/P then trace back D2016 switching? ? On Sat, Jul 23, 2022 at 6:03 AM Andrew Lenton <a@...> wrote: Hi the SAT button on and off a few times!
? Hitting the SAT button lights up all the buttons for sat operation. Do hear anything click, but not sure if I am supposed to. ? Check Q2017 is switching as this will kill off the UHF RX and TX LO this should be working as RX is working can you confirm this, tx on a hand held or signal generator
RX is working, confirmed by handheld ? D2017 the anodes of the diodes are switched separately for TX and RX, confirm the LO is on cathode of D2016, then follow the LO through the circuit path to the TX LO O/P via Q2039 ?
?
? OK TP 4 to TP 7, is the supply to the VCO, pulled on by a PNP transistor in Q2015 to 18. ? OK we have VHF 1 + 2 and UHF 1 + 2, and 4 VCO, I suspect two are for TX and the other two for the RX VCO as they will probably be different frequencies! Or slit frequency operation (not sure here) or when TX and RX are used simultaneously in SAT mode? ?
73 ? Andrew ? From: Max Donoghue [mailto:ve3tmt@...]
Sent: 22 July 2022 19:34
To: Andrew
Subject: Re: If low at O/P then trace back D2016 switching? ? Went digging into the PLL board. I'm getting 3.66V at TP2003 in TX D2019 is switching as expected, one line high for HF, one for VHF and one for UHF. All three lines tested fine.On the underside of the PLL board, I am getting 7.9V on TP2006, but not TP2007 which leads to Q2018. On UHF I'm getting 7.9V on pin 2 of Q2017 but nothing on pin 2 of Q2018 check if there is something there on RX On VHF I'm getting 7.9V on pin 2 of Q2016 but nothing on pin 2 of Q2015 check if there is something there on RX ? On Fri, Jul 22, 2022 at 1:29 PM Max Donoghue <ve3tmt@...> wrote: Correction to my earlier results, TX IF signal is present on all bands.? TX LO signal is present on all bands except 440. No output there. ? On Fri, Jul 22, 2022 at 7:55 AM Max Donoghue <ve3tmt@...> wrote: No worries I appreciate all the help. ? On Fri, Jul 22, 2022, 7:51 AM Andrew <a@...> wrote: Interesting? ok I am away from home in Torquay, I have limited access to circuits? however? we are nearly there.
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Re: If low at O/P then trace back D2016 switching?
GO on pin 3 or the collector of Q2014, there should be a healthy signal there on RX as it is working! And on TX the seam level but a different frequency ? 73 ? Andrew ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Max Donoghue
Sent: 24 July 2022 01:25
To: [email protected]
Subject: Re: [YaesuFT847] If low at O/P then trace back D2016 switching? ? Am I making the correct measurements? ? On Sat, Jul 23, 2022, 6:48 PM Andrew Lenton <a@...> wrote: Seems odd the voltages are good on the VF0 control voltage pin! There is not much to go wrong on a VCO I will see if I can find one!
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Re: If low at O/P then trace back D2016 switching?
Dear Max, ? Take a look below: ? The UHF path to the LO output is slightly different to VHF so from D2018 it is the same, Q2022 is unique for UHF ? Bottom line: ? there is switched power on MD2003 or MD2004 Pin 4 ?there should be and o/p on Pin 3, I cannot believe both are dead! One may be. Recheck pin 3 go on the pins ? R2042 and R2047 33R check those resistors ? In our first comms, I thought you said you hand held could pick the UHF signal when on TX, is this correct, this implies all is well apart from the TX PA chain? So a bit confused here, has a plug pulled out somewhere ? VTB is the switching to D2017 ? ? 
? 
?
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From: [email protected] [mailto:[email protected]] On Behalf Of Max Donoghue
Sent: 23 July 2022 14:55
To: Andrew Lenton
Cc: [email protected]
Subject: Re: [YaesuFT847] If low at O/P then trace back D2016 switching? ? On Sat, Jul 23, 2022 at 6:03 AM Andrew Lenton <a@...> wrote: Hi the SAT button on and off a few times!
? Hitting the SAT button lights up all the buttons for sat operation. Do hear anything click, but not sure if I am supposed to. ? Check Q2017 is switching as this will kill off the UHF RX and TX LO this should be working as RX is working can you confirm this, tx on a hand held or signal generator
RX is working, confirmed by handheld ? D2017 the anodes of the diodes are switched separately for TX and RX, confirm the LO is on cathode of D2016, then follow the LO through the circuit path to the TX LO O/P via Q2039 ?
?
? OK TP 4 to TP 7, is the supply to the VCO, pulled on by a PNP transistor in Q2015 to 18. ? OK we have VHF 1 + 2 and UHF 1 + 2, and 4 VCO, I suspect two are for TX and the other two for the RX VCO as they will probably be different frequencies! Or slit frequency operation (not sure here) or when TX and RX are used simultaneously in SAT mode? ?
73 ? Andrew ? From: Max Donoghue [mailto:ve3tmt@...]
Sent: 22 July 2022 19:34
To: Andrew
Subject: Re: If low at O/P then trace back D2016 switching? ? Went digging into the PLL board. I'm getting 3.66V at TP2003 in TX D2019 is switching as expected, one line high for HF, one for VHF and one for UHF. All three lines tested fine.On the underside of the PLL board, I am getting 7.9V on TP2006, but not TP2007 which leads to Q2018. On UHF I'm getting 7.9V on pin 2 of Q2017 but nothing on pin 2 of Q2018 check if there is something there on RX On VHF I'm getting 7.9V on pin 2 of Q2016 but nothing on pin 2 of Q2015 check if there is something there on RX ? On Fri, Jul 22, 2022 at 1:29 PM Max Donoghue <ve3tmt@...> wrote: Correction to my earlier results, TX IF signal is present on all bands.? TX LO signal is present on all bands except 440. No output there. ? On Fri, Jul 22, 2022 at 7:55 AM Max Donoghue <ve3tmt@...> wrote: No worries I appreciate all the help. ? On Fri, Jul 22, 2022, 7:51 AM Andrew <a@...> wrote: Interesting? ok I am away from home in Torquay, I have limited access to circuits? however? we are nearly there.
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Re: If low at O/P then trace back D2016 switching?
I do not believe in two faults, the VCO assuming it is a VCO, might me fixed frequency and the if moves to change frequency.
Check 8 V on both VCO, tx rx, the check the o/p, tx and rx share a path, this is the likely area for a fault, however, the two UHF VCO also share a reference, and if this is missing or out of lock, an inhibit will come into play. Let me study further
73
Andrew
Get
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Re: If low at O/P then trace back D2016 switching?
Am I making the correct measurements?
On Sat, Jul 23, 2022, 6:48 PM Andrew Lenton < a@...> wrote: Seems odd the voltages are good on the VF0 control voltage pin!
There is not much to go wrong on a VCO I will see if I can find one!
Get
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Re: If low at O/P then trace back D2016 switching?
Seems odd the voltages are good on the VF0 control voltage pin!
There is not much to go wrong on a VCO I will see if I can find one!
Get
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Re: If low at O/P then trace back D2016 switching?
I'll button it up for now so I can get back to using it and look for a PLL board to replace. Would probably be the easiest remedy.
On Sat, Jul 23, 2022, 6:13 PM Andrew Lenton < a@...> wrote:
Sorry did not spot the attachments check directly on the the UHF TX VCO
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Does UHF RX work, judging by your measurements, I would say no.
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VHF frequency of 190 Mhz was unsepected, so the LO is high
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Looks like the UHF VCO has died!
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Re: If low at O/P then trace back D2016 switching?
Sorry did not spot the attachments check directly on the the UHF TX VCO
Does UHF RX work, judging by your measurements, I would say no.
VHF frequency of 190 Mhz was unsepected, so the LO is high
Looks like the UHF VCO has died!
Get
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Re: If low at O/P then trace back D2016 switching?
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Re: If low at O/P then trace back D2016 switching?
On Sat, Jul 23, 2022 at 6:03 AM Andrew Lenton < a@...> wrote:
Hi the SAT button on and off a few times!
?
Hitting the SAT button lights up all the buttons for sat operation. Do hear anything click, but not sure if I am supposed to.
? Check Q2017 is switching as this will kill off the UHF RX and TX LO this should be working as RX is working can you confirm this, tx on a hand held or signal generator
RX is working, confirmed by handheld
Measurements taken:
? D2017 the anodes of the diodes are switched separately for TX and RX, confirm the LO is on cathode of D2016, then follow the LO through the circuit path to the TX LO O/P via Q2039 ?
 ?
? OK TP 4 to TP 7, is the supply to the VCO, pulled on by a PNP transistor in Q2015 to 18. ? OK we have VHF 1 + 2 and UHF 1 + 2, and 4 VCO, I suspect two are for TX and the other two for the RX VCO as they will probably be different frequencies! Or slit frequency operation (not sure here) or when TX and RX are used simultaneously in SAT mode? ?
?
73 ? Andrew ? From: Max Donoghue [mailto:ve3tmt@...]
Sent: 22 July 2022 19:34
To: Andrew
Subject: Re: If low at O/P then trace back D2016 switching? ? Went digging into the PLL board. I'm getting 3.66V at TP2003 in TX D2019 is switching as expected, one line high for HF, one for VHF and one for UHF. All three lines tested fine.On the underside of the PLL board, I am getting 7.9V on TP2006, but not TP2007 which leads to Q2018. On UHF I'm getting 7.9V on pin 2 of Q2017 but nothing on pin 2 of Q2018 check if there is something there on RX On VHF I'm getting 7.9V on pin 2 of Q2016 but nothing on pin 2 of Q2015 check if there is something there on RX ? On Fri, Jul 22, 2022 at 1:29 PM Max Donoghue <ve3tmt@...> wrote: Correction to my earlier results, TX IF signal is present on all bands.? TX LO signal is present on all bands except 440. No output there. ? On Fri, Jul 22, 2022 at 7:55 AM Max Donoghue <ve3tmt@...> wrote: No worries I appreciate all the help. ? On Fri, Jul 22, 2022, 7:51 AM Andrew <a@...> wrote: Interesting? ok I am away from home in Torquay, I have limited access to circuits? however? we are nearly there.
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Re: If low at O/P then trace back D2016 switching?
Hi the SAT button on and off a few times! ? Check Q2017 is switching as this will kill off the UHF RX and TX LO this should be working as RX is working can you confirm this, tx on a hand held or signal generator ? D2017 the anodes of the diodes are switched separately for TX and RX, confirm the LO is on cathode of D2016, then follow the LO through the circuit path to the TX LO O/P via Q2039 ? 
? OK TP 4 to TP 7, is the supply to the VCO, pulled on by a PNP transistor in Q2015 to 18. ? OK we have VHF 1 + 2 and UHF 1 + 2, and 4 VCO, I suspect two are for TX and the other two for the RX VCO as they will probably be different frequencies! Or slit frequency operation (not sure here) or when TX and RX are used simultaneously in SAT mode? ? 73 ? Andrew ?
toggle quoted message
Show quoted text
From: Max Donoghue [mailto:ve3tmt@...]
Sent: 22 July 2022 19:34
To: Andrew
Subject: Re: If low at O/P then trace back D2016 switching? ? Went digging into the PLL board. I'm getting 3.66V at TP2003 in TX D2019 is switching as expected, one line high for HF, one for VHF and one for UHF. All three lines tested fine.On the underside of the PLL board, I am getting 7.9V on TP2006, but not TP2007 which leads to Q2018. On UHF I'm getting 7.9V on pin 2 of Q2017 but nothing on pin 2 of Q2018 check if there is something there on RX On VHF I'm getting 7.9V on pin 2 of Q2016 but nothing on pin 2 of Q2015 check if there is something there on RX ? On Fri, Jul 22, 2022 at 1:29 PM Max Donoghue <ve3tmt@...> wrote: Correction to my earlier results, TX IF signal is present on all bands.? TX LO signal is present on all bands except 440. No output there. ? On Fri, Jul 22, 2022 at 7:55 AM Max Donoghue <ve3tmt@...> wrote: No worries I appreciate all the help. ? On Fri, Jul 22, 2022, 7:51 AM Andrew <a@...> wrote: Interesting? ok I am away from home in Torquay, I have limited access to circuits? however? we are nearly there.
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Indeed we are, I will track the fault down over the weekend? by studying the circuits
73
Andrew
Get
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For those who were following this thread...
I received my Tiny SA signal analyzer yesterday and started checking signals.
https://www.tinysa.org/wiki/
The TX local oscillator signal is present on all bands. The TX IF signal is present on all bands except 440.
Andrew and I are now trying to find out why.
Max
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Hi Max, ? OK you need to check J3006 TX I.F., and J3007 TX LO, they are common to VHF and UHF, The LO is the bit that changes frequency, check it does and the level is the same on VHF and UHF, if all good then Q3002 is looking suspect. ? Not sure of the actual frequencies, or if the LO is higher than the IF or lower, The IF can be 1.8 to 30MHZ, no idea what frequency is used for VHF and UHF say 15MHz, then then the LO would be 425 MHz for 440 MHz ? 73 ? Andrew ? 
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J3008 - TX IF ~ 600mV
Checked D3035 and D3036? both 0.762V one way, nothing the other
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Voltage readings:
J3015 pin 7 (UT8)? 7.83V
J3016 pin 3 (UT8)?? 7.83V
J3011 pin 1 (UHF T8)?? 7.83V
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Hi Everyone, I received the below in my email today.? I hope somene can help the gentilman. :)? I'll give the group first dibs on this, then it'll be going up for grabs on QRZ.com.? Do NOT contact? me unless you have no luck with him.??
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?
F M (Dan) Daniels?<w5kkq@...>
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to?N4MAV@...,?kubotadan@...
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Russ,
?
This is W5KKQ , Dan Daniels
I am ok in QRZ
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I saw the Ft847 groups I/O page.? I have an FT847es for sale.
I have Wet?Age-Related?Macular?Degeneration in both eyes.
My right eye is almost blind.I?cannot?read the dials on the?
FT847es. So I had switch to a Flex 5000a so I have a 32" screen.
?
I bought it from a neighbor, KT5U, he bought it new. I have the?original?box,
and packing that came with it. The push button mike that came with it, and?
the 12VDC?power cable that came with it. I have a programing cable that goes with it.
?
It is clean and the box is still?in great?shape. I am asking $750.00. If you will?allow m
to post on the FT847 Groups I/O page or if you post it for me. This is a special radio.
I live near Dallas and looking for some hams interested in AMSAT.
?
Thanks, Russ?for reading this email.
If you think any of the FT847 community will be?interested in this radio
I will send you pictures and the serial number.
kubotadan@...
Best 73's
Dan Daniels
W5KKQ
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Andrew Lenton
