Re: S9 noise on HF with or without antenna
Hi Bill and thanks for the reply. I had a little nose inside and injected a smallish signal and found that there was stray RF on the IF from the G4HUP PAT board I fitted many years ago.? ? I feel a bit silly now as the PAT board has worked flawlessly but for some reason I was getting some IMD and broadcast FM from the 3m band. I really love my FT847 and I have a spare (A2 US Import and C2 UK specifications) and I really don’t want to see them damaged. So I’ve taken out both PAT board (IF tap and 2nd receiver) and they are now in the trash. The main problem is the IF was being overloaded even though I was using the 2nd receiver PAT board and not the IF tap for Panadapter.
? Thanks for the heads up but this is resolved and I doubt I will be re-visiting the PAN adapter anytime soon.
De Spence M0STO? Sent while portable! please excuse typos.
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On 5 Jan 2022, at 12:29, Bill < k2wh@...> wrote: Not sure of the FT847, but does it have a function or ability to turn off the AGC ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Spence M0STO via
Sent: Wednesday, January 05, 2022 3:56 AM
To: [email protected]
Subject: [YaesuFT847] S9 noise on HF with or without antenna ? Dear Group, I have a bit of a strange question. My FT847 has nothing but S9 of noise on HF (I work mostly satellite these days so only just noticed it). I tried all bands but seem to be blighted with an S9 signal with or without the antenna connected. The other issue is when I tune to a strong AM station in the lower broadcast band 2.2mhz seemed to be the strongest +50db on AM but the audio is dreadful and sounds splattered, clipped and inaudiable. I have been using a passive loop on HF and I’m fearing DC or a strong signal has landed in the front end and done damage.?
Before I tear my radio apart to resolve this I wondered if anyone had pointers. I know the FT897 used to suffer with S9 all the time due to the 455khz ceramic filters going bad but don’t think the FT847 uses them.
? Any help would be really appreciated.
thanks in advanced,
de Spence M0STO?
see below the test gear on hand to resolve this.
test gear:
Marconi 2955 radio test set
Marconi 2022 Signal Generator
Rigol DSA1030A spectrum analyser
Phillips 3833 60mhz Scope
AF generator?
VVM
logic probe etc.
GDO
-- Bill, K2WH
|
Re: S9 noise on HF with or without antenna
Not sure of the FT847, but does it have a function or ability to turn off the AGC ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Spence M0STO via groups.io
Sent: Wednesday, January 05, 2022 3:56 AM
To: [email protected]
Subject: [YaesuFT847] S9 noise on HF with or without antenna ? Dear Group, I have a bit of a strange question. My FT847 has nothing but S9 of noise on HF (I work mostly satellite these days so only just noticed it). I tried all bands but seem to be blighted with an S9 signal with or without the antenna connected. The other issue is when I tune to a strong AM station in the lower broadcast band 2.2mhz seemed to be the strongest +50db on AM but the audio is dreadful and sounds splattered, clipped and inaudiable. I have been using a passive loop on HF and I’m fearing DC or a strong signal has landed in the front end and done damage.?
Before I tear my radio apart to resolve this I wondered if anyone had pointers. I know the FT897 used to suffer with S9 all the time due to the 455khz ceramic filters going bad but don’t think the FT847 uses them.
? Any help would be really appreciated.
thanks in advanced,
de Spence M0STO?
see below the test gear on hand to resolve this.
test gear:
Marconi 2955 radio test set
Marconi 2022 Signal Generator
Rigol DSA1030A spectrum analyser
Phillips 3833 60mhz Scope
AF generator?
VVM
logic probe etc.
GDO
-- Bill, K2WH
|
S9 noise on HF with or without antenna
Dear Group, I have a bit of a strange question. My FT847 has nothing but S9 of noise on HF (I work mostly satellite these days so only just noticed it). I tried all bands but seem to be blighted with an S9 signal with or without the antenna connected. The other issue is when I tune to a strong AM station in the lower broadcast band 2.2mhz seemed to be the strongest +50db on AM but the audio is dreadful and sounds splattered, clipped and inaudiable. I have been using a passive loop on HF and I’m fearing DC or a strong signal has landed in the front end and done damage.?
Before I tear my radio apart to resolve this I wondered if anyone had pointers. I know the FT897 used to suffer with S9 all the time due to the 455khz ceramic filters going bad but don’t think the FT847 uses them.
? Any help would be really appreciated.
thanks in advanced,
de Spence M0STO?
see below the test gear on hand to resolve this.
test gear:
Marconi 2955 radio test set
Marconi 2022 Signal Generator
Rigol DSA1030A spectrum analyser
Phillips 3833 60mhz Scope
AF generator?
VVM
logic probe etc.
GDO
|
Howdo Rob.? Spraying cleaner at it will do absolutely nothing. It is a crimped together unit, and no chance of getting any spray on to the contacts. I have new ones in stock, but usually clean the old ones. This involves the front off, knobs off, encoder out and put back together. I have done quite a few.? Regards old chap Andy~ G4XNG
On Tue, 4 Jan 2022 at 20:09, Omni < selcor@...> wrote: Mechanical encoders get dirty just like Pots do.? There is no problem with using a good quality cleaner that is intended for the purposes.? I would pick one that has some lubricating quality to it.? That will minimize the contact wear.? Caig Laboratories makes great products.? I use various concentrations of their Deoxit cleaner depending on what needs to be cleaned and how dirty it is.? I also use GC Electronics DE-OX-ID, which does a good job and is much less expensive than the Caig cleaners.? I have been using both types for years with great results.? Just remember to use them sparingly.? You can always add more if needed.? Spray a little and work the encoder to see where you are.? It may take a little time and a couple of small squirts to get the results you want. ? From: [email protected] [mailto:[email protected]] On Behalf Of Rob
Sent: Tuesday, January 04, 2022 2:18 PM
To: [email protected]
Subject: [YaesuFT847] Dodgy Rotary switch ? Hi All,
I have one little problem with my 847.the MEM/VFO CH rotary seems dirty.... i.e. it jumps around in frequency sometimes when I turn it.
Would it be safe to start spraying switch cleaner at it?
TIA
Rob G4UJS
|
Mechanical encoders get dirty just like Pots do. ?There is no problem with using a good quality cleaner that is intended for the purposes.? I would pick one that has some lubricating quality to it.? That will minimize the contact wear.? Caig Laboratories makes great products.? I use various concentrations of their Deoxit cleaner depending on what needs to be cleaned and how dirty it is.? I also use GC Electronics DE-OX-ID, which does a good job and is much less expensive than the Caig cleaners. ?I have been using both types for years with great results.? Just remember to use them sparingly.? You can always add more if needed.? Spray a little and work the encoder to see where you are.? It may take a little time and a couple of small squirts to get the results you want. ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Rob
Sent: Tuesday, January 04, 2022 2:18 PM
To: [email protected]
Subject: [YaesuFT847] Dodgy Rotary switch ? Hi All,
I have one little problem with my 847.the MEM/VFO CH rotary seems dirty.... i.e. it jumps around in frequency sometimes when I turn it.
Would it be safe to start spraying switch cleaner at it?
TIA
Rob G4UJS
|
Hi All,
I have one little problem with my 847.the MEM/VFO CH rotary seems dirty.... i.e. it jumps around in frequency sometimes when I turn it.
Would it be safe to start spraying switch cleaner at it?
TIA
Rob G4UJS
|
Re: Replacement parts needed.
I repaired one of the shafts successfully by printing a D-shaped insert (the whole shaft is hollow) and gluing it in place. Perfect repair.
Thanks for the help guys!
Brad, N7IVV
|
Re: Replacement parts needed.
They make parts that will not stick to epoxy because most people do not usually try. I would have drilled the inner out and used a bit of wire or a tiny diameter screwthread as a dowel before trying to glue, to give a better mechanical bond.
On Tue, 28 Dec 2021 at 02:05, Bradley RIsk < riskbr@...> wrote:
The repair failed. What do they make those shafts out of that won’t stick to epoxy, CA, or fuse with solvent??? Sheesh.
?
So I need both parts.
?
Brad
?
?
I have the MEM/VFO encoder in stock.?
Which is the one that you think you can repair?
?
On Mon, 27 Dec 2021 at 20:18, John Hopkinson via <hopkinsonj=[email protected]> wrote:
Hi try searching for Q9000704, I bought one from eBay last year for ?10 uk
?
On 27 Dec 2021, at 09:18, Bradley RIsk <riskbr@...> wrote:
?Greetings.
I need to replace the components (encoders?) for the SUB-TUNE and MEM/VFO CH controls on my rig. It got dropped and the shafts broke off. I MIGHT be able to glue/epoxy one of the shafts together, but the other is irreparable. The PC board IDs are S6531 and
S6538, but that's the best I can do for identification.
Any hints on what parts I might search on at DigiKey or Mouser or whatever would be appreciated.
73
Brad, N7IVV
|
Re: Replacement parts needed.
The repair failed. What do they make those shafts out of that won’t stick to epoxy, CA, or fuse with solvent??? Sheesh.
?
So I need both parts.
?
Brad
?
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From: [email protected] < [email protected]>
On Behalf Of Andy Bosworth
Sent: Monday, December 27, 2021 3:33 PM
To: [email protected]
Subject: Re: [YaesuFT847] Replacement parts needed.
?
I have the MEM/VFO encoder in stock.?
Which is the one that you think you can repair?
?
On Mon, 27 Dec 2021 at 20:18, John Hopkinson via <hopkinsonj=[email protected]> wrote:
Hi try searching for Q9000704, I bought one from eBay last year for ?10 uk
?
On 27 Dec 2021, at 09:18, Bradley RIsk <riskbr@...> wrote:
?Greetings.
I need to replace the components (encoders?) for the SUB-TUNE and MEM/VFO CH controls on my rig. It got dropped and the shafts broke off. I MIGHT be able to glue/epoxy one of the shafts together, but the other is irreparable. The PC board IDs are S6531 and
S6538, but that's the best I can do for identification.
Any hints on what parts I might search on at DigiKey or Mouser or whatever would be appreciated.
73
Brad, N7IVV
|
Re: Replacement parts needed.
I have the MEM/VFO encoder in stock.? Which is the one that you think you can repair?
On Mon, 27 Dec 2021 at 20:18, John Hopkinson via <hopkinsonj= [email protected]> wrote: Hi try searching for Q9000704, I bought one from eBay last year for ?10 uk On 27 Dec 2021, at 09:18, Bradley RIsk <riskbr@...> wrote:
?Greetings.
I need to replace the components (encoders?) for the SUB-TUNE and MEM/VFO CH controls on my rig. It got dropped and the shafts broke off. I MIGHT be able to glue/epoxy one of the shafts together, but the other is irreparable. The PC board IDs are S6531 and S6538, but that's the best I can do for identification.
Any hints on what parts I might search on at DigiKey or Mouser or whatever would be appreciated.
73
Brad, N7IVV
|
Re: Replacement parts needed.
Hi try searching for Q9000704, I bought one from eBay last year for ?10 uk
toggle quoted message
Show quoted text
On 27 Dec 2021, at 09:18, Bradley RIsk <riskbr@...> wrote:
?Greetings.
I need to replace the components (encoders?) for the SUB-TUNE and MEM/VFO CH controls on my rig. It got dropped and the shafts broke off. I MIGHT be able to glue/epoxy one of the shafts together, but the other is irreparable. The PC board IDs are S6531 and S6538, but that's the best I can do for identification.
Any hints on what parts I might search on at DigiKey or Mouser or whatever would be appreciated.
73
Brad, N7IVV
|
Re: Replacement parts needed.
Thanks for the info!!
?
73
Brad, N7IVV
?
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From: [email protected] < [email protected]>
On Behalf Of Nils Ostman
Sent: Monday, December 27, 2021 5:23 AM
To: [email protected]
Subject: Re: [YaesuFT847] Replacement parts needed.
?
Hi,
Sub-Tune S6538 Yaseu # Q9000706, Panasonic EVQVEJF0324B
Mem/Vfo S6531? Yaseu # Q9000704, Panasonic EVQVEMF0324B
Check with Yaesu, I bought from the UK branch in 2021.
73
Nils SM7DVO
|
Re: Replacement parts needed.
Hi,
Sub-Tune S6538 Yaseu # Q9000706, Panasonic EVQVEJF0324B
Mem/Vfo S6531? Yaseu # Q9000704, Panasonic EVQVEMF0324B
Check with Yaesu, I bought from the UK branch in 2021.
73
Nils SM7DVO
|
Replacement parts needed.
Greetings.
I need to replace the components (encoders?) for the SUB-TUNE and MEM/VFO CH controls on my rig. It got dropped and the shafts broke off. I MIGHT be able to glue/epoxy one of the shafts together, but the other is irreparable. The PC board IDs are S6531 and S6538, but that's the best I can do for identification.
Any hints on what parts I might search on at DigiKey or Mouser or whatever would be appreciated.
73
Brad, N7IVV
|
Re: Need Guide to Use FT-847 For Digital Modes
Hi Mike I use a ZLP electronics digimaster pro as an interface between my FT847 and pc. It works seamlessly with HRD & Fldigi using PSK, Olivia etc, and although I am not in favour of FT 8 and other similar modes it works and allows full alc control from the front.?
Hope this helps
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On 22 Dec 2021, at 00:42, Micky Corrow <opus@...> wrote:
?Greetings.
I know it probably has been discussed an unknown number of times previously, but I want to start using my 847 in the digital modes, both on HF as well as 6M + VHF/UHF. I want the members here to create the Ultimate FT-847 Digital Guide.
Let me take a moment to describe my setup - I have separate antennas and amplifiers for each output on the 847. Each amp is hard-keyed by the 847, via a special breakout cable I obtained on ebay. It works great. I don't want to use the mic input on the front of the radio for data, I have a mic connected there and I don't want to be switching cables for different bands.
I have a laptop running JTDX and FLDigi, I would like to use CAT control to manage frequencies, but it is not cast in stone. I know how to push buttons and spin the dial... I use Log4OM v.2 for logging, and I use JTAlert for needed entities alerts. I have all three (minus FLDigi) apps integrated with each other to work seamlessly. The big unknown is the FT-847.?
I would like suggestions on how to integrate the computer with the radio so that I can feed it from the ports on the back and manage the drive and the ALC from the front. The laptop has an internal sound card that I feed some speakers with to hear the alerts, and an inexpensive USB sound card to feed the radio. If at all possible I would like to use CAT control to switch frequencies and modes, but so far that has been problematic for me, so suggestions there wouldn't hurt.
In the end I would like to compile all the suggestions and guides into one document and upload it to the Files section so that others don't need to reinvent the wheel each time they dig into digital with the FT-847.
Thanks in advance.
Micky K1XH?
|
Re: Need Guide to Use FT-847 For Digital Modes
Sure, but how do you use the rig with a microphone?
I don't want to continually move cables around when switching uses.
That just leads to breaking things, or forgetting to change something
and being frustrated when it doesn't work.
Greg KO6TH
Dirk Esterline wrote:
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My 847 worked well with a RigBlaster Nomic connected to the mic input
on the front of the rig.
|
Re: Need Guide to Use FT-847 For Digital Modes
Hi Bruno,
Sorry, I did not mean to insult the radio or their designers.? It is
by far my favorite all-mode / all band / satellite rig that I've
owned.? Just some of the decisions made when they designed the user
interface leave me a bit baffled.? It appears to me that they
defined a set of use cases and focused the design on them, but they
took the cases as separate things instead of what has evolved to
wanting to do ALL of them without moving any cables.? My other
radios have a single jack in the back for all the modes.? (And,
apologies for conflating Mode with Band.? Yes, the DIN is for the FM
modes, with the TRS for the others.)
I understand that predicting the future is difficult, but it seems
they tried too hard to make things easy, and in my opinion made it
harder instead.? It's an all too common problem in user interface
design.? There's a "law of things" related to this, which I have
found true:? "The structure of a product matches the structure of
the organization that created it" (aka "Conway's Law").? It would
not surprise me if there were separate teams working on the
"digital" and FM sections and their respective interfaces.? Each
optimized their design for their use case in isolation, all the way
out to the back panel plug.? Anyone who doesn't align with those
specific use cases ends up having more work to do, which as things
tend to evolve quickly, is pretty common.?
Contrast this with the FT-817/818, which has a single DIN connector
that feeds any of the modes depending on the radio's setting, with
that mode being settable via CAT as well.? I have one configured
with a Raspberry Pi running Direwolf, FLDigi, WSJT-X, JS8Call,
QSSTV, and probably a few others yet to come, depending on what I
want to do at the time.? No moving of cables, no external switching,
no secondary (and costly!) interface boxes, perfectly
forward-compatible.? Just a few wires and a PTT level shifter for
the software that isn't CAT-aware.? Simple.? Done.
A clarification.? My use of the term "overload" was from the
engineering lingo, meaning that one interface serves multiple
different functions.? In this case, as you note, the TRS input
combines both PTT and Audio - two separate functions - on one pin.?
It has nothing to do with having too much voltage or power, and is a
very common interface, universally used with HTs for example.? I did
not mean to imply it was a problem; just stating how it worked as
different from the DIN port which has them separate.? My point was
that either method is probably fine, but pick one.
After all that, a question:? Your comment about the audio source
chosen when keying the rig from CAT has me puzzled.? If not from the
front (Mike ) input, where is the audio selected from?
Thanks for the feedback,
Greg? KO6TH
on6ab wrote:
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Hi Greg,
?
With all respect,
a healthy approach on these kind of problems should be “what am
I doing wrong” instead of blaming the FT847 to fail, to be dumb
or to pretend it wants to be smart.
In most cases, the people designing a transceiver like the
FT-847 are smarter than you and me.
If you can't "fathom" why they would use a hand mike's audio for
a rig keyed by a computer, that's normal - because they don't.
The purposes of
the PKT and? DATA IN/OUT connectors are explained in the manual
on pages 16 (AFSK) and 17 (FM packet).
The PKT connector
is for FM ( not to be confused with VHF/UHF).
The DATA IN/OUT
jack is for AFSK ( not to be confused with HF).
All digital AFSK software – no matter the frequency - ?goes via
the DATA IN/OUT jack.
?
Also, the
required resistor and the DC blocking capacitor are NOT there
because of overload problems. They’re there in order to add PTT
functionality via the same jack.
The easiest
solution to solve all your DATA and PTT problems is to aquire a
Yaesu SCU-17 interface.
All computer
connectivity go via a single USB connector and the connections
to the FT-847 go via a supplied RS232 DB9 cable (CAT) and a
supplied 3 pin jack cable (audio and PTT).
Good luck,
Bruno ON6AB
|
Re: Need Guide to Use FT-847 For Digital Modes
Hi Bruno,
May the in/out of both connectors be put together or should this be separated with a switch?
Now I alternately plug these depending on SSB or FM use Sometimes that is forgotten...
thanks
Dirk - ON4AEE
|
Re: Need Guide to Use FT-847 For Digital Modes
My 847 worked well with a RigBlaster Nomic connected to the mic input on the front of the rig.?
Hi Greg,
?
With all respect, a healthy approach on these kind of problems should be “what am I doing wrong” instead of blaming the FT847 to fail, to be dumb or to pretend it wants to be smart.
In most cases, the people designing a transceiver like the FT-847 are smarter than you and me.
If you can't "fathom" why they would use a hand mike's audio for a rig keyed by a computer, that's normal - because they don't.
The purposes of the PKT and? DATA IN/OUT connectors are explained in the manual on pages 16 (AFSK) and 17 (FM packet).
The PKT connector is for FM ( not to be confused with VHF/UHF).
The DATA IN/OUT jack is for AFSK ( not to be confused with HF).
All digital AFSK software – no matter the frequency - ?goes via the DATA IN/OUT jack.
?
Also, the required resistor and the DC blocking capacitor are NOT there because of overload problems. They’re there in order to add PTT functionality via the same jack.
The easiest solution to solve all your DATA and PTT problems is to aquire a Yaesu SCU-17 interface.
All computer connectivity go via a single USB connector and the connections to the FT-847 go via a supplied RS232 DB9 cable (CAT) and a supplied 3 pin jack cable (audio and PTT).
Good luck,
Bruno ON6AB
-- Dirk Esterline PHS Spanish
|
Re: Need Guide to Use FT-847 For Digital Modes
Bruno, I have an early model 847 and never found out about the update the Yaesu had, so I never got the upgrade or update board. Do you know if the SCU-17 will allow me to do the digital modes? If I could find that board, I would get one and install it, my 847 is like new with bot a lot of use. Gerry Klotz
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On Dec 22, 2021, at 6:21 AM, on6ab <bruno.beckers@...> wrote:
? Hi Greg,
?
With all respect, a healthy approach on these kind of problems should be “what am I doing wrong” instead of blaming the FT847 to fail, to be dumb or to pretend it wants to be smart.
In most cases, the people designing a transceiver like the FT-847 are smarter than you and me.
If you can't "fathom" why they would use a hand mike's audio for a rig keyed by a computer, that's normal - because they don't.
The purposes of the PKT and? DATA IN/OUT connectors are explained in the manual on pages 16 (AFSK) and 17 (FM packet).
The PKT connector is for FM ( not to be confused with VHF/UHF).
The DATA IN/OUT jack is for AFSK ( not to be confused with HF).
All digital AFSK software – no matter the frequency - ?goes via the DATA IN/OUT jack.
?
Also, the required resistor and the DC blocking capacitor are NOT there because of overload problems. They’re there in order to add PTT functionality via the same jack.
The easiest solution to solve all your DATA and PTT problems is to aquire a Yaesu SCU-17 interface.
All computer connectivity go via a single USB connector and the connections to the FT-847 go via a supplied RS232 DB9 cable (CAT) and a supplied 3 pin jack cable (audio and PTT).
Good luck,
Bruno ON6AB
|
Spence G5STO
Bill
Andy Bosworth
Nils Ostman