Hi Rolf,
I have the MFJ-939 wth my FT-847. It works well & no problems (upto now, anyway!).
73.....Mike.

Hi Nils and Joseph,

many thanks for the answers.

Actually I try to find an automatic tuner with interface cable.And yes, the FT847 is no longer in production.

73 Rolf, DC1ZZ

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Hi Rolf,
I must confess that I haven't read the manual for the 929 until today... The version seems to be 1006 and the age of the unit is unknown to me since I bought it second hand.
The only connections I have made to the 929 is RF in and out, no interface cable to the 847. I operate on all bands 160 to 28 and my multiband vertical isn't the best choice specially on the lower bands.
On some rare occations in the winter when there is heavy snow the 929 can have problem to tune the antenna on 160.
What I like the best about the 929 is the "install and forget" feature that works so well for me.
73
Nils?

Hi Nils,

thank you very much for the reply.

I used the MFJ 929 myself many years ago. At that time I had noticed that the firmware version in my device was a very old one and from the selection of transceivers to be connected was not identical to the firmware of the current series.
At that time it was about another transceiver, which was not to be set in the old MFJ 929, but in the new firmware version (other IC). Conversely, it could now also be that the old FT847 is no longer compatible with the newer/actual firmware.
Unfortunately I can't test this by myself because I sold the MFJ929 long time ago.

May I therefore ask which firmware version is in use in your MFJ 929 ?


Thanks for feedback

73 Rolf, DC1ZZ

Hi,
I use MFJ-929 on all bands 160 - 10 meters with a multiband vertikal Sandpiper 10.
Have worked abouit 3000 QSO so far. Works very well for me.
/Nils SM7DVO

Hello,

I am looking for an automatic tuner (no FC20) for a FT847, which works well with this transceiver. Do you have a recommendation for me ?

Many thanks in advance.

73 Rolf, DC1ZZ

not exactly the same question??
but I run the TRS connection as my only audio in/out and key line
for HF/VHF/UHF, lots of FT8 during the VHF/UHF contests?
I also run a USB serial thingy and let it trip a small relay which pulls down the PTT line via that 2k resistor or whatever is needed
I run a modded USB sound card (I removed the resistor that puts the DC on the mic line)
never had any trouble, even though it is not supposed to work for VHF/UHF ( I didnt know it wasnt supposed to work when I got my first 847)?
and my second one works the same way

am I confused ?

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Hi Steven,

Yeah, I'm not sure what the designers of the 847 were thinking when it came to digital operation.? It appears that they tried to have the transmit audio path follow the source of PTT (seems logical), so the two different connectors on the back (HF, VHF) need to be keyed on their respective jacks.? The audio from the other sources is severely muted.? The problem is that when the rig is keyed with CAT, both of the back jacks are muted.? I guess they figured (somehow) that CAT would be used with the hand mike?? Odd.

The back jacks also use different keying methods.? The HF TRS port overloads the Tx audio line (commonly used to key an HT), while the VHF DIN port has a separate PTT pin.

I was able to use CAT with the 847 a few years ago by using a high level audio source to override the muting, but that didn't seem to be a good idea long term.? The 847 does not have VOX, so your choices are to either use an interface box such as the Signalink, or configure things to use a serial port modem line.? Right now I'm using a Raspberry Pi, where, the easiest method is to use Direwolf TNC and a GPIO pin to drive a transistor buffer for PTT, but not all digital mode software understands the Pi's GPIO structure, and not all modes have Pi-compatible versions.

With that intro, here's what I do.? It should be adaptable to other platforms.? I have a cable rigged up to use a modem line (DTR) from an FTDI USB serial adapter board to drive the PTT line.? The module has TTL outputs, so can drive an old TTL inverter chip (7404) to get the logic sense correct, then to a 2N2222 (as an open collector buffer) through a resistor.? The transistor's collector then tugs on the PTT line.? For VHF I use Direwolf as the sound card TNC, , but anything that can be configured to use DTR for keying should work.

In order to enable the rig for both HF and VHF modes (i.e. both of the jacks on the back of the rig), I wired up a cable that connects the audio line on the HF (TRS) port, through an in-line capacitor to the VHF (DIN) port so that the VHF port doesn't key the HF port.? Switches either route the transistor's PTT output through a 2k resistor to the audio line (for HF), or to a separate wire to the VHF PTT line to the DIN port.? Very confusing to wire up, and prone to operator failure in use, but once the switches are set right it seems robust enough.? If you don't need the HF modes, you can skip the switches and DC-blocking cap, and go direct to the VHF DIN port.

Or just buy a Signalink interface...

Good luck!

Greg? KO6TH

Hello,
I am having a problem originating a message.
Before I waste anyone's I would like to ask the following question of the group before proceeding.

Is there anyone who has successfully installed and can run WinLink psp? and Gateway messages without using CAT using a Yaesu FT-847?

Thank You,
Steven/kc3dow

Hi everyone,

I am desperately searching for a replacement plastic knob for the Mic/RF control.? I am told that the Yaesu part no. is?RA0065300A.? I have enquired in loads of places, and everyone is out of stock.

I enclose a pic so you can see what is missing from my faithful FT-847.? I am also aware that people call these things different names around the world so a pic tells the story more accurately.

Please contact me direct at m0pdj@...

Has anyone used the Kenwood KPS-15 to power the FT-847?

Chew 9V1YP

>The Yaesu filter is the same as used in the FT1000MP

That's how I found mine.? While researching filter options for the FT847 I found several references saying the filters in the FT1000MP will fit.? I then found a guy who was parting out filters from an FT1000MP and he sent me pictures of the filter to confirm it is the correct one that will fit.? Up until then I had been watching the for-sale sites for a long time for FT847 filters and ignoring the FT1000MP listings.

A Yaesu filter list:?http://pages.cs.wisc.edu/~timc/e/filters.html

It looks like INRAD still has some of the 500hz crystal filters for the FT847 available:



The Yaesu filter is the same as used in the FT1000MP subreceiver, so there are probably plenty of them out there.

73 John AF5CC

And, if anybody here in NZ needs this switch, please note that Element14/Farnell has them 'until current stock is exhausted'. Their order code is 1435767. At the moment they are on 'back order'.....presumably pending arrival from overseas. Price is NZ$3-odd each,
HTH? somebody!
Mike.

Cw filter?

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Anyone have a cell filter for the 847??

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