One of my buddies is selling his 847, but it's one of the unidirectional models. Will I still be able to take advantage of doppler tracking and digital modes with it? Or do either of these require bi-directional CAT control? I'm not too pressed about seeing the frequency on the screen, just about it actually controlling the radio. Needless to say I've been spoiled with USB CAT control with my 7300 for some time now.

On 18 Feb 2025, at 16:42, Spence G5STO via groups.io <unavailable.equal@...> wrote:

?

The FT847 has the same 8 pin connections for other tuners. FC10, FC20, FC30 and others. This is important for band switching.

I have all three tuners and tested them all and they all work well. ?

? Other tuners don’t have band switching or inhibit so effectively transmitting into a high SWR while the servos do their thing unless it’s a purely relay ATU (CG3000, SGC SG230 and some LDG tuners). When it comes to the FC20 the steppers initially tune variable capacitors and switch in inductance. ?The FC10 is similar but the FC30 is more relay based. I like to think the FC20 as hybrid.?

? When you switch bands with the FC20 you see “wait” come up on the LCD while the capacitors tune. Again FC10 but from memory the “wait” only appears for a few seconds of at all on the FC30. These tuners are generally aesthetically similar to the radio they are designed for eg: shape, size etc.

? I’m not sure about the FC40 as I never owned one but if it’s got a 8 pin tuner socket then I’m sure it would work.

? If you consider the FC10, FC20 and FC30 all tune on the SWR and all receive the tune start and stop sequence in cooperation with the radio. They inhibit the transmit. The only difference between the FT847 and FT897 is the label is “sense” and the other label is “Band C” meaning change.

? This is just my observations and the fact I’ve owned or own the equipment.

? Hope it helps,

De Spence G5STO

??

Sent while portable! please excuse typos.

On 18 Feb 2025, at 15:42, Jeff M0UHF via groups.io <jeff.elliott45@...> wrote:

? Cheers thanks for your reply. I expected this anyway I thought it should work but it’s just that for some reason most of these units do not list the 847 yet it has the same connection as the other AC radios which I thought was bizarre strange?

Sent from Jeff M0UHF?

On 18 Feb 2025, at 15:40, Sandor Wetsel via groups.io <kg4fet@...> wrote:

?

EVERY Auto AT with a semi automatic mode will work with any radio. Just send a carrier and they will tune.?
Sandor KG4FET

On Tue, Feb 18, 2025, 8:20?AM vstockma@... via <vstockma=[email protected]> wrote:

There are 2 tuners that work with this radio. The FC-20 and the YT847. The YT847 is better in that it allows a PC connection for CAT control AND tuner funtionality. If you install the FC20, you will loose the ability to control the radio via CAT. Wither of these appear on or ebail, but you have to be patient.

I see that one is currently listed on Swap.

Thanks

Victor?

W4VAS

On 18 Feb 2025, at 16:42, Spence G5STO via groups.io <unavailable.equal@...> wrote:

?

The FT847 has the same 8 pin connections for other tuners. FC10, FC20, FC30 and others. This is important for band switching.

I have all three tuners and tested them all and they all work well. ?

? Other tuners don’t have band switching or inhibit so effectively transmitting into a high SWR while the servos do their thing unless it’s a purely relay ATU (CG3000, SGC SG230 and some LDG tuners). When it comes to the FC20 the steppers initially tune variable capacitors and switch in inductance. ?The FC10 is similar but the FC30 is more relay based. I like to think the FC20 as hybrid.?

? When you switch bands with the FC20 you see “wait” come up on the LCD while the capacitors tune. Again FC10 but from memory the “wait” only appears for a few seconds of at all on the FC30. These tuners are generally aesthetically similar to the radio they are designed for eg: shape, size etc.

? I’m not sure about the FC40 as I never owned one but if it’s got a 8 pin tuner socket then I’m sure it would work.

? If you consider the FC10, FC20 and FC30 all tune on the SWR and all receive the tune start and stop sequence in cooperation with the radio. They inhibit the transmit. The only difference between the FT847 and FT897 is the label is “sense” and the other label is “Band C” meaning change.

? This is just my observations and the fact I’ve owned or own the equipment.

? Hope it helps,

De Spence G5STO

??

Sent while portable! please excuse typos.

On 18 Feb 2025, at 15:42, Jeff M0UHF via groups.io <jeff.elliott45@...> wrote:

? Cheers thanks for your reply. I expected this anyway I thought it should work but it’s just that for some reason most of these units do not list the 847 yet it has the same connection as the other AC radios which I thought was bizarre strange?

Sent from Jeff M0UHF?

On 18 Feb 2025, at 15:40, Sandor Wetsel via groups.io <kg4fet@...> wrote:

?

EVERY Auto AT with a semi automatic mode will work with any radio. Just send a carrier and they will tune.?
Sandor KG4FET

On Tue, Feb 18, 2025, 8:20?AM vstockma@... via <vstockma=[email protected]> wrote:

There are 2 tuners that work with this radio. The FC-20 and the YT847. The YT847 is better in that it allows a PC connection for CAT control AND tuner funtionality. If you install the FC20, you will loose the ability to control the radio via CAT. Wither of these appear on or ebail, but you have to be patient.

I see that one is currently listed on Swap.

Thanks

Victor?

W4VAS

On 18 Feb 2025, at 15:42, Jeff M0UHF via groups.io <jeff.elliott45@...> wrote:

? Cheers thanks for your reply. I expected this anyway I thought it should work but it’s just that for some reason most of these units do not list the 847 yet it has the same connection as the other AC radios which I thought was bizarre strange?

Sent from Jeff M0UHF?

On 18 Feb 2025, at 15:40, Sandor Wetsel via groups.io <kg4fet@...> wrote:

?

EVERY Auto AT with a semi automatic mode will work with any radio. Just send a carrier and they will tune.?
Sandor KG4FET

On Tue, Feb 18, 2025, 8:20?AM vstockma@... via <vstockma=[email protected]> wrote:

There are 2 tuners that work with this radio. The FC-20 and the YT847. The YT847 is better in that it allows a PC connection for CAT control AND tuner funtionality. If you install the FC20, you will loose the ability to control the radio via CAT. Wither of these appear on or ebail, but you have to be patient.

I see that one is currently listed on Swap.

Thanks

Victor?

W4VAS

On 18 Feb 2025, at 15:40, Sandor Wetsel via groups.io <kg4fet@...> wrote:

?

EVERY Auto AT with a semi automatic mode will work with any radio. Just send a carrier and they will tune.?
Sandor KG4FET

On Tue, Feb 18, 2025, 8:20?AM vstockma@... via <vstockma=[email protected]> wrote:

There are 2 tuners that work with this radio. The FC-20 and the YT847. The YT847 is better in that it allows a PC connection for CAT control AND tuner funtionality. If you install the FC20, you will loose the ability to control the radio via CAT. Wither of these appear on or ebail, but you have to be patient.

I see that one is currently listed on Swap.

Thanks

Victor?

W4VAS

I don't see why one needs a buffer to connect the PTT in the amp to a
FT-847. Per the amp manual the open circuit voltage is 12V and the
current
is 10ma max. The stby jack on the 847 is rated at 24V and 100ma.
Thus
the voltage rating is twice the needed voltage and the current
capability
is 10 times the needed current. I've used my 847 with several
different
solid state VHF amplifiers and never had a problem. Now if you were
connecting an old tube amplifier there likely would be a problem as the
amp
key line is often a negative voltage over 100 volts. Just read the amp
manual and check the max voltage and current rating required.

73,

Tom K6EU



On Sun, Jan 26, 2025 at 12:08?PM Spence G5STO via groups.io
<unavailable.equal@...> wrote:

?Hi,
Justin a quick question? What are your expectations? Band change?

Or

just TX and ALC?

I have both but there is no band change data from an FT847 but you

do

have standby for PTT. You cannot hook up the FT847’s PTT socket to

the

FL7000 without safely using a buffer. You just need a cheap

optoisolated

relay with short to ground. That goes to the STBY socket of the FT847

and

the buffered side to the FL7000. The ALC “from memory” is -9vdc but

might

be wrong. I use mine straight though but let me double check that the

-9vdc

is in the range for the FT847 as I also have the VL1000 and that

again has

no option for band change other than use the F button in sequence and

let

the radio auto sense band from the signal.

Other radios like the FT840 I have the band data but not the FT847.

De Spence G5STO


Sent while portable! please excuse typos.

On 26 Jan 2025, at 19:40, Mal Whitby via groups.io <vk2mw=
[email protected]> wrote:

?
Hi Guy's n Gals.

I recently purchased a FL-7000 & was wanting to interface it with my
FT-847.

Was wanting to know if anyone has interfaced their FT-847 with a

FL-7000 &

could let me know the pin-outs for a interface cable, or where I may

be

able to get one from.

Your help is greatly appreciated.


Best 73



Mal J Whitby VK2MW

?Hi,

? ? Justin a quick question? What are your expectations? Band change? Or just TX and ALC?

? I have both but there is no band change data from an FT847 but you do have standby for PTT. You cannot hook up the FT847’s PTT socket to the FL7000 without safely using a buffer. You just need a cheap optoisolated relay with short to ground. That goes to the STBY socket of the FT847 and the buffered side to the FL7000. The ALC “from memory” is -9vdc but might be wrong. I use mine straight though but let me double check that the -9vdc is in the range for the FT847 as I also have the VL1000 and that again has no option for band change other than use the F button in sequence and let the radio auto sense band from the signal.

? Other radios like the FT840 I have the band data but not the FT847.

De Spence G5STO?

??

Sent while portable! please excuse typos.

On 26 Jan 2025, at 19:40, Mal Whitby via <vk2mw=[email protected]> wrote:

?

Hi Guy's n Gals.?

I recently purchased a FL-7000 & was wanting to interface it with my FT-847.?

Was wanting to know if anyone has interfaced their FT-847 with a FL-7000 & could let me know the pin-outs for a interface cable, or where I may be able to get one from.

Your help is greatly appreciated.

Best 73

?

Mal J Whitby VK2MW

?

On 26 Jan 2025, at 19:40, Mal Whitby via groups.io <vk2mw@...> wrote:

?

Hi Guy's n Gals.?

I recently purchased a FL-7000 & was wanting to interface it with my FT-847.?

Was wanting to know if anyone has interfaced their FT-847 with a FL-7000 & could let me know the pin-outs for a interface cable, or where I may be able to get one from.

Your help is greatly appreciated.

Best 73

?

Mal J Whitby VK2MW

?

Hi Rob,

I've not found the need to have an isolation transformer, but yes, DC blocking is needed to keep the rig from going into transmit.? If you don't have a transformer the blocking is also needed by the TNC, as some (sound cards especially) don't like having a DC bias pushed into them.?

Attached is the circuit I've used.? Component values aren't critical, but if the capacitor is too small you won't get good audio through, and if it's too large the rig will go into transmit for a short time while it charges up.? This is the same circuit as was often used on older HTs.

Note that the PTT signal is assumed to be some sort of "open collector" drive.? If it's being driven by a modem line, you'll need to add that via an NPN transistor buffer.? 2N2222, 2.2k, 1N4001 for a bit of protection.? See the upper circuit in the diagram.

Hope this helps,

Greg? KO6TH

Rob MW0CQU via groups.io 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

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

On 5 Jan 2025, at 16:40, Spencer Tomlinson <unavailable.equal@...> wrote:

?I don’t see a 10uf capacitor in the FSK out lines?

De Spence G5STO

Sent while portable! please excuse typos.

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

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