On 5 Jan 2025, at 14:19, Rob MW0CQU via groups.io <mw0cqu@...> wrote:

?

Afternoon all ,?

Checking my understanding of a perceived challenge here with you all:
before buying the bits and prototyping a cable...?

It seems that plugging the 847's rear 3.5mm data jack into anything with audio isolation transformers
at the far end (thereby effectively dc grounding the tip of the 3.5mm plug) forces the rig into
constant TX irrespective of any remote PTT settings (correct?)?

And therefore, interfaces like the SCU-17 which feature such isolation, require something like a 10nF
blocking cap (depicted as C-BLOCK --||-- below) like (hope this scales) :

RIG END? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? PC INTERFACE END

? ? ? ? ? ?|----------------------------------------|
TIP |RING|EARTH|------------------|EARTH|RING|TIP|
?|----------------------||-----------------------------|
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?C-BLOCK

inline to stop this constant PTT (correct?)?

is there any other way (I cannot see one in the menu?) to disable that data port PTT without rig surgery ?

many thanks and 73 de

'CQU

Hi All,

A dumb question perhaps on the surface, but when transmitting AFSK data via the rear port of the 847
And not using CAT mode for PTT (as I gather CAT mode expects mic audio through the mic socket not?
the rear port) should I actually be seeing RF power going out on the wattmeter ? or just the?
[USB] [CAT] and [DATA] indicators please ?

set up is?

Xubuntu desktop---scu17---FT847
{Hamlib}

Tuner unplugged (tick in the box)?

* CAT function is working tuning the rig fine
* SCU-17 getting audio to the linux PC
* SCU-17 is pushing audio from linux to the 847 (verified with a double headphone adapter, and headphones
. Good levels (can nearly blow my ears off)? PC to radio.
* PTT is keying, [USB][DATA] indicators turns on,

but nothing deflecting the wattmeter even with the SCU-16 volume level at MAX , and no replies to my CQ's ;-)?

have I missed a setting perhaps?, a rig fault ? or some other overlooked factor ??

Many thanks in advance de

CQU

Hi Greg

Yes use CAT and the PTT test function in WSJT worked (red) and the
radio Tx's (ssb-data) My TX works its the lack of ANY rx that's the issue.

As I said in my mail, I have swapped the FT5000 onto the port I use on
the interface for VHF and all works fine, so my assumption is the PC >
Interface >Ft5000 is fine on either port of the interface, so the
problem is in the lead (which I have replaced with no luck) or the
data jack on the FT847,

There has been no hardware changes since day 1 set up of FT8 on 2m and all worked until recently.

I cant help thinking something has gone wrong on the data jack port, it all seems to point to that, anyone had similar problem?

Stumped!

73
Pete
G4RRM

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Greg D
via groups.io
Sent: 18 December 2024 18:07
To: [email protected]
Subject: Re: [YaesuFT847] FT847 Data Problem

Audio routing on the 847 is fixed, so a grayed-out config button is correct.? Receive audio goes to all the ports (Data, DIN, and the speaker), but transmit audio source is dependent on the mode and where PTT is triggered from.? SSB transmit audio comes from the Data jack; FM transmit audio comes from the DIN connector.? If you key the rig from CAT, the transmit audio comes from the mike connector on the front, which is probably the last place it would come from.

If your transmit audio went away I would suspect that you weren't in SSB mode, but that shouldn't affect receive.? Sounds to me like a problem on the PC side of things (audio mixer settings).

{shrug}

Greg? KO6TH


G4RRM Pete via groups.io wrote:

I looked in the settings of WSJT and see that Transmit Audio Source
is set to Front/Mic but is greyed out and unable to change to
Rear/Data which I would have expected the setting to be.

Hi Greg

Yes use CAT and the PTT test function in WSJT worked (red) and the radio Tx's (ssb-data)
My TX works its the lack of ANY rx that's the issue.

As I said in my mail, I have swapped the FT5000 onto the port I use on the interface for VHF and all works fine, so my assumption is the PC > Interface >Ft5000 is fine on either port of the interface, so the problem is in the lead (which I have replaced with no luck) or the data jack on the FT847,

There has been no hardware changes since day 1 set up of FT8 on 2m and all worked until recently.

I cant help thinking something has gone wrong on the data jack port, it all seems to point to that, anyone had similar problem?

Stumped!

73
Pete
G4RRM

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Greg D via groups.io
Sent: 18 December 2024 18:07
To: [email protected]
Subject: Re: [YaesuFT847] FT847 Data Problem

Audio routing on the 847 is fixed, so a grayed-out config button is correct.? Receive audio goes to all the ports (Data, DIN, and the speaker), but transmit audio source is dependent on the mode and where PTT is triggered from.? SSB transmit audio comes from the Data jack; FM transmit audio comes from the DIN connector.? If you key the rig from CAT, the transmit audio comes from the mike connector on the front, which is probably the last place it would come from.

If your transmit audio went away I would suspect that you weren't in SSB mode, but that shouldn't affect receive.? Sounds to me like a problem on the PC side of things (audio mixer settings).

{shrug}

Greg? KO6TH


G4RRM Pete via groups.io wrote:

I looked in the settings of WSJT and see that Transmit Audio Source is
set to Front/Mic but is greyed out and unable to change to Rear/Data
which I would have expected the setting to be.

I looked in the settings of WSJT and see that Transmit Audio Source is
set to Front/Mic but is greyed out and unable to change to Rear/Data
which I would have expected the setting to be.

I looked in the settings of WSJT and see that Transmit Audio Source is set to Front/Mic but is greyed out and unable to change to Rear/Data which I would have expected the setting to be.