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  1. YaesuFT847
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Date
Re: To TX on SSB any Frequency FM works fine

 

开云体育

Yes thanks for that I have found the fault it was the 2nd TX I.F. Mixer out of lock! And there are all sorts of little mods everywhere and not on the circuit diagram

?

73

?

Andrew

?

From: [email protected] [mailto:[email protected]] On Behalf Of Nils Ostman
Sent: 07 March 2022 07:19
To: [email protected]
Subject: Re: [YaesuFT847] To TX on SSB any Frequency FM works fine

?

Hi Andrew,
Have you checked the reverse side of the AF-board? i ,had an "impossible" problem with full power on FM/SSB but only 100 mW in CW. There was a sloppy "factory mod" under Q1081.
/Nils?

Re: To TX on SSB any Frequency FM works fine

 

Hi Andrew,
Have you checked the reverse side of the AF-board? i ,had an "impossible" problem with full power on FM/SSB but only 100 mW in CW. There was a sloppy "factory mod" under Q1081.
/Nils?
Re: To TX on SSB any Frequency FM works fine

 

开云体育

Hi Nils,

?

Thank you very much this compares to my readings, it is odd not to see the AF output on pin2, but it is there further up the food chain on the input to the balanced modulator

?

73

?

Andrew

?

From: [email protected] [mailto:[email protected]] On Behalf Of Nils Ostman
Sent: 06 March 2022 13:54
To: [email protected]
Subject: Re: [YaesuFT847] To TX on SSB any Frequency FM works fine

?

Hi,
I did a brief check on a working 847:
Q 1053
Pin 1? ?3.8
Pin 2? ?1.9
Pin 3? ?3 - 5 depending on mic gain
Pin 4? ?3.9
Pin 5? ?gnd
Pin 6? ?nc
Pin 7? 3.8
Pin 8? ?4.2
Pin 9? 3.7
Pin 10 7.6
Measured? with a Fluke.
The LF level on pin2 (out) and pin4 (in) are about the same with the mic gain i middle position.
/Nils
SM7DVO

Re: To TX on SSB any Frequency FM works fine

 

Hi,
I did a brief check on a working 847:
Q 1053
Pin 1? ?3.8
Pin 2? ?1.9
Pin 3? ?3 - 5 depending on mic gain
Pin 4? ?3.9
Pin 5? ?gnd
Pin 6? ?nc
Pin 7? 3.8
Pin 8? ?4.2
Pin 9? 3.7
Pin 10 7.6
Measured? with a Fluke.
The LF level on pin2 (out) and pin4 (in) are about the same with the mic gain i middle position.
/Nils
SM7DVO
Re: To TX on SSB any Frequency FM works fine

 

Adding circuit tat was cut off I

have also added some voltage for Q1063: Pin 1, Pin 3.8V 2, 1.8 Volt, Pin 3, 3.6-4.8V (mic gain control range) Pin4 3.7V Pin 5 earth, Pin6 NC, Pin7 3.7V, Pin 8 4.2V Pin 9 3.6V Pin 10 7.4V?

Pin 2 seems low which is the audio out on the current mirror circuit, but nothing is coming out!

73

Andrew


image_2022-03-05_174259.png

To TX on SSB any Frequency FM works fine

 
Edited

My basic problem is I seem to have lost Mic audio after Q1053 there is nothing coming out of Pin 4. Pin 4 travels half way around the radio and ends up at Q1038 Pin 6. Q1053 is an electronic attenuator controlled by Pin 3, this does move up and down with the mic gain control.

?

If I switch the monitor on I hear my Mic audio coming out the speaker, so this obviously takes another path. Not sure where. There are no voltages or waveforms on the technical supplement, so I have no of knowing what is normal.

?

?

The output of IC Q1063 ends up on Pin 12 on IC 1C1081 (switch) ?which in accessible on the top side of the AF board. The Voltage levels on Q1053 would also be useful, if you can get there and measure them.

?

Is there any way anyone could scope a working model and let me know if audio is getting through and roughly the levels? This way I know roughly where my fault lies?

73 Andrew G8UUG


?

image_2022-03-05_140227.png
FT 847 AF1 Board.png

Re: new, hello

 

开云体育

Updating batter for battery!

?

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Carl KO4SSA via groups.io
Sent: 05 March 2022 12:53
To: [email protected]
Subject: Re: [YaesuFT847] new, hello

?

No, does not have 4 meter mod.

?

The resistors on the board don’t seem to be 0 ohm, they’re 1 ohm. ?Have others found this? ?All documentation I can find says it doesn’t matter.?



On Feb 26, 2022, at 10:01 AM, Andrew Lenton <a@...> wrote:

?

I have enclosed a pic of mine TX ?1.8 to 70 140 to 174 420 to 470 MHz I removed the battery for better pic

?

?

Avoid Transmitting 30 to 40 MHz as the HF low pass filter will heat up and burn at 100 Watts

?

Does your Japan Model have the 4M UK Mod or not?

?

73

?

Andrew

?

?

From:?[email protected]?<[email protected]>?On Behalf Of?Andy Bosworth
Sent:?26 February 2022 00:01
To:?[email protected]
Subject:?Re: [YaesuFT847] new, hello

?

Also try 111010.?
It seems there are different configurations , and possibly conflicting evidence.?
I doubt if Yaesu would make a custom IC, just for JA market

?

?

Virus-free.?

?

On Fri, 25 Feb 2022 at 21:36, Carl KO4SSA via??<cbeaudette99=[email protected]> wrote:

nope, still get “error”

?

(after setting jumpers:

press FAST and LOCK, and power up,

menu 39 ALL INIT, press MCK/W,

Try TX on 144 MHz ?—> ?works

Try TX on 147 MHz —> “error"




On Feb 25, 2022, at 2:47 PM, Andy Bosworth <sidthepop@...> wrote:

?

On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450

?

On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via??<cbeaudette99=[email protected]> wrote:

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.??

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl




?

?

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?
Re: new, hello

 

开云体育

1 OHM is fine, a link and 1 Ohm in this instance is the same thing, probably work fine up to 470 ohm?

?

73

?

Andrew

?

From: [email protected] [mailto:[email protected]] On Behalf Of Carl KO4SSA via groups.io
Sent: 05 March 2022 12:53
To: [email protected]
Subject: Re: [YaesuFT847] new, hello

?

No, does not have 4 meter mod.

?

The resistors on the board don’t seem to be 0 ohm, they’re 1 ohm. ?Have others found this? ?All documentation I can find says it doesn’t matter.?



On Feb 26, 2022, at 10:01 AM, Andrew Lenton <a@...> wrote:

?

I have enclosed a pic of mine TX ?1.8 to 70 140 to 174 420 to 470 MHz I removed the batter for better pic

?

?

Avoid Transmitting 30 to 40 MHz as the HF low pass filter will heat up and burn at 100 Watts

?

Does your Japan Model have the 4M UK Mod or not?

?

73

?

Andrew

?

?

From:?[email protected]?<[email protected]>?On Behalf Of?Andy Bosworth
Sent:?26 February 2022 00:01
To:?[email protected]
Subject:?Re: [YaesuFT847] new, hello

?

Also try 111010.?
It seems there are different configurations , and possibly conflicting evidence.?
I doubt if Yaesu would make a custom IC, just for JA market

?

?

Virus-free.?

?

On Fri, 25 Feb 2022 at 21:36, Carl KO4SSA via??<cbeaudette99=[email protected]> wrote:

nope, still get “error”

?

(after setting jumpers:

press FAST and LOCK, and power up,

menu 39 ALL INIT, press MCK/W,

Try TX on 144 MHz ?—> ?works

Try TX on 147 MHz —> “error"




On Feb 25, 2022, at 2:47 PM, Andy Bosworth <sidthepop@...> wrote:

?

On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450

?

On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via??<cbeaudette99=[email protected]> wrote:

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.??

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl




?

?

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?
Re: new, hello

 

开云体育

No, does not have 4 meter mod.

The resistors on the board don’t seem to be 0 ohm, they’re 1 ohm. ?Have others found this? ?All documentation I can find says it doesn’t matter.?

On Feb 26, 2022, at 10:01 AM, Andrew Lenton <a@...> wrote:

I have enclosed a pic of mine TX ?1.8 to 70 140 to 174 420 to 470 MHz I removed the batter for better pic
?
?
Avoid Transmitting 30 to 40 MHz as the HF low pass filter will heat up and burn at 100 Watts
?
Does your Japan Model have the 4M UK Mod or not?
?
73
?
Andrew
?
?
From:?[email protected]?<[email protected]>?On Behalf Of?Andy Bosworth
Sent:?26 February 2022 00:01
To:?[email protected]
Subject:?Re: [YaesuFT847] new, hello
?
Also try 111010.?
It seems there are different configurations , and possibly conflicting evidence.?
I doubt if Yaesu would make a custom IC, just for JA market
?
?
Virus-free.?
?
On Fri, 25 Feb 2022 at 21:36, Carl KO4SSA via??<cbeaudette99=[email protected]> wrote:
nope, still get “error”
?
(after setting jumpers:
press FAST and LOCK, and power up,
menu 39 ALL INIT, press MCK/W,
Try TX on 144 MHz ?—> ?works
Try TX on 147 MHz —> “error"


On Feb 25, 2022, at 2:47 PM, Andy Bosworth <sidthepop@...> wrote:
?
On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450
?
On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via??<cbeaudette99=[email protected]> wrote:

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.??

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl



?


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Yaesu FC-20 repair

 

Dear Owners, took delivery of the parts on Saturday and took some time out to fit them today and can report after gutting all the burnt carbon and working the board. New components are in and following Andrews advice set TC1001 to null while checking the other test points.

SWR is 1.02:1 on nearly all bands into a Comet H422 at 3 meters (my test antenna). Working well.

Thanks to everyone who participated and hope I can return the favour in the future.
See the repair which was challenging and used non conductive glue to stick down the core and prevent it moving.


Before



After



I know the board still looks burned but it’s back to good FR4 I assure you. The photo doesn’t do it justice.


73 and hope to catch you all in my log soon.

De Spence M0STO

Sent while portable! please excuse typos.

image2.jpeg
image1.jpeg

Re: new, hello

 

开云体育

I have enclosed a pic of mine TX ?1.8 to 70 140 to 174 420 to 470 MHz I removed the batter for better pic

?

?

Avoid Transmitting 30 to 40 MHz as the HF low pass filter will heat up and burn at 100 Watts

?

Does your Japan Model have the 4M UK Mod or not?

?

73

?

Andrew

?

?

From: [email protected] <[email protected]> On Behalf Of Andy Bosworth
Sent: 26 February 2022 00:01
To: [email protected]
Subject: Re: [YaesuFT847] new, hello

?

Also try 111010.?
It seems there are different configurations , and possibly conflicting evidence.?
I doubt if Yaesu would make a custom IC, just for JA market

?

?

Virus-free.

?

On Fri, 25 Feb 2022 at 21:36, Carl KO4SSA via <cbeaudette99=[email protected]> wrote:

nope, still get “error”

?

(after setting jumpers:

press FAST and LOCK, and power up,

menu 39 ALL INIT, press MCK/W,

Try TX on 144 MHz ?—> ?works

Try TX on 147 MHz —> “error"



On Feb 25, 2022, at 2:47 PM, Andy Bosworth <sidthepop@...> wrote:

?

On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450

?

On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via <cbeaudette99=[email protected]> wrote:

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.?

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl



?


This email has been scanned by BullGuard antivirus protection.
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20220226_145618.jpg

Re: new, hello

 

Also try 111010.?
It seems there are different configurations , and possibly conflicting evidence.?
I doubt if Yaesu would make a custom IC, just for JA market


Virus-free.


On Fri, 25 Feb 2022 at 21:36, Carl KO4SSA via <cbeaudette99=[email protected]> wrote:
nope, still get “error”

(after setting jumpers:
press FAST and LOCK, and power up,
menu 39 ALL INIT, press MCK/W,
Try TX on 144 MHz ?—> ?works
Try TX on 147 MHz —> “error"

On Feb 25, 2022, at 2:47 PM, Andy Bosworth <sidthepop@...> wrote:

On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450

On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via <cbeaudette99=[email protected]> wrote:
Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.?

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl
Re: new, hello

 

开云体育

nope, still get “error”

(after setting jumpers:
press FAST and LOCK, and power up,
menu 39 ALL INIT, press MCK/W,
Try TX on 144 MHz ?—> ?works
Try TX on 147 MHz —> “error"

On Feb 25, 2022, at 2:47 PM, Andy Bosworth <sidthepop@...> wrote:

On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450

On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via <cbeaudette99=[email protected]> wrote:
Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.?

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl
Re: new, hello

 

开云体育

tried 110001, no work. ?
Yaesu document says that jumpers 7-9 should be open. ?Where are these? I don’t see jumpers 7-9 labeled on the PCB.

( After setting jumpers:
fast-lock pressed, power on,?
menu 39 —> mock/w
try tx on 147.0 MHz ? )

On Feb 25, 2022, at 2:50 PM, Andrew Lenton <a@...> wrote:

Hi here you go

733
Andrew G8UUG <FT 847mod by Yeasu.pdf>
Re: new, hello

 

Hi here you go

733
Andrew G8UUG

FT 847mod by Yeasu.pdf
FT 847mod by Yeasu.pdf

Re: new, hello

 

Here you go

73 Andrew

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Carl KO4SSA via groups.io
Sent: 25 February 2022 19:10
To: [email protected]
Subject: [YaesuFT847] new, hello

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan. I’m wondering how to modify for US bands. As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!! Haven’t heard back.

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up. Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!! (into dummy load of course) I point out as evidence that changing the solder jumpers did do SOMETHING. Also, initially the cross-band repeater item was not available on the menu and now it appeared. More evidence that changing the jumpers did something.

Thanks Carl





This email has been scanned by BullGuard antivirus protection.
For more info visit www.bullguard.com

FT 847mod by Yeasu.pdf
FT 847mod by Yeasu.pdf

Re: new, hello

 

On the jumpers try 101011 by jumper number, do? reset after.?
Should give HF coverage, 144-148 and 430 -450


On Fri, 25 Feb 2022 at 19:32, Carl KO4SSA via <cbeaudette99=[email protected]> wrote:
Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan.? I’m wondering how to modify for US bands.? As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!!? Haven’t heard back.?

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up.? Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!!? (into dummy load of course)? I point out as evidence that changing the solder jumpers did do SOMETHING.? Also, initially the cross-band repeater item was not available on the menu and now it appeared.? More evidence that changing the jumpers did something.

Thanks Carl
Re: new, hello

 

Hi this is very straight forward let me dig out the info for

73

Andrew

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Carl KO4SSA via groups.io
Sent: 25 February 2022 19:10
To: [email protected]
Subject: [YaesuFT847] new, hello

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan. I’m wondering how to modify for US bands. As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!! Haven’t heard back.

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up. Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!! (into dummy load of course) I point out as evidence that changing the solder jumpers did do SOMETHING. Also, initially the cross-band repeater item was not available on the menu and now it appeared. More evidence that changing the jumpers did something.

Thanks Carl





This email has been scanned by BullGuard antivirus protection.
For more info visit www.bullguard.com
new, hello

 

Hi FT-847 fans!!

This is Carl, KO4SSA.
I just purchased a used 847 on eBay, from Japan. I’m wondering how to modify for US bands. As delivered only TX 144-146 and 430-440.
I’ve searched high and low on the the web, including Colin, G1IVG’s page, and emailed him!! Haven’t heard back.

I’ve tried several solder joint configurations and will not TX on 146.52 or 445000. About to give up. Is the Japan stuff transmit range burned into EPROM or something????

Colin lists several HF coverage configurations and I am able to transmit on 14.550!! (into dummy load of course) I point out as evidence that changing the solder jumpers did do SOMETHING. Also, initially the cross-band repeater item was not available on the menu and now it appeared. More evidence that changing the jumpers did something.

Thanks Carl
Re: Yaesu FC20

 

开云体育

Nice one!

?

From: [email protected] [mailto:[email protected]] On Behalf Of Nils Ostman
Sent: 23 February 2022 16:12
To: [email protected]
Subject: Re: [YaesuFT847] Yaesu FC20

?

[Edited Message Follows]

If yoy need some close up photos of a not toasted FC-20. Let med know.
Nils
SM7DVO

721 - 740 of 1110