I run 100 watts max, that’s all I have. ? It’s been a long time since I had an FT-857, I now use the IC-9700 which is 100 watts max. ? So, since its only 50 watts, I would run full power or lower power to drive an amp. ? Many confuse the description of FT8 as a weak signal mode and it is but the term weak signal mode, describes its ability to decode very weak signals but many misinterpret this and believe they need to use low power IE. use low power. ? FT8 is capable of copying very weak signals but that does not mean you should lower your power especially on 2 meters where high power is almost mandatory if you want to work the weak ones. ? I am currently building a kilowatt amp for 2. ? K2WH ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Alan via groups.io
Sent: Thursday, December 02, 2021 3:27 PM
To: [email protected]
Subject: Re: [YaesuFT847] Power out Ft8 2m ? Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running. -- Bill, K2WH
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If I recall, I think I was running around 30 watts on 2m, last time
I tried it there.? Not much by way of contacts (it was winter field
day, I think), but the 847 seemed ok with it.? I was feeding a 2x8
element CP yagi on the roof.
As has been noted, FT-8 is a weak signal mode, not necessarily a low
power mode.?
Greg? KO6TH
Alan via groups.io wrote:
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Bill the 847 will
only give a max of 50w on 2m. I thought it was clear what I wanted
to do with it, but let's try again. I want to run with no amp the
847 on 2m using FT8. If others are doing this between 0 and 50w
max what power are you running.
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Alan, I would suggest you stick with 50 watts or full power on FT8. I use mostly MSK144 as I'm in a remote location and rely on Meteors or Aircraft Scatter and I use 400 to 800 watts with an 18 element beam at 60 feet.
Have fun with FT8 on 2 meters.
W7FSI DN-24 IDAHO
Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.
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Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.
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Depends on what you want to do.? I think most are running anywhere from 30-50 watts if using and amplifier.
No amp, most I would think are running full power or 100 watts.
Just my opinion.
Bill, K2WH
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I've? just started using my 847 on 2m FT8. What's the maximum power everyones running with 2m FT8?
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The dotted lines representing the shield of a coax cable, with the
center conductor running up the middle.? The circles are the ends of
the cable.
Greg? KO6TH
EI8KF wrote:
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One other
question... what do the circles attached with dotted lines
represent in the diagram??
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Hi Mike,
Almost, and maybe.? I think.
The way I connected the Transmit Audio (externally) had the TRS
"upstream" from the DIN, with a second blocking cap in between (+ to
the TRS), and with original blocking cap upstream from there.? I had
it your way (DIN upstream), but had to swap it the other way for
some reason which escapes me right now.
But even so, I think you need to key the two jacks separately so
that the rig will route the audio to the appropriate modulator (SSB
vs FM).? I did that with an external SPDT "Packet vs FT-8" switch.?
I don't know what will happen if both interfaces are given PTT at
the same time.? Might be interesting, hopefully not exciting...
So along with the external switch, I made a patch cable between the
two jacks with the cap in-line.? The second cap is upstream from
there so the TRS's 5v PTT bias doesn't hit the audio port on the
computer (makes mine unhappy).?
I'm sure I could simplify things a bit, but with a pile of pulled
hair already littering the bench I decided to stop once I found
something that worked.? Part of the complexity was that I wanted to
do all of the modes (HF and Packet) from the variety of apps on the
Pi, and there's little consistency among them for keying the rig.?
Then I made things worse when I upgraded the Pi3B to a 4B, which is
missing the modem control signals on its internal serial port.?
Grrrr...
If you try keying both ports together, please let us know what
happens!? Where does the Transmit Audio go?
Good luck!
Greg? KO6TH
Mike - W1MI wrote:
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That gives me an
idea, Greg.? I wonder if I can add the blocking cap and resister
to my radio internally between the TRS and the mini-DIN and just
use the mini-DIN plug with my rigblaster plug-n-play?
73, Mike - W1MI
On Tue, Nov 16, 2021 at 07:25 PM, Greg D wrote:
I've not used the RigExpert, but have interfaced a
Raspberry Pi to the 847.? The diagram looks good, at least on
the 847 side.
The TRS jack is used for the HF (SSB) modes.? As shown in your
diagram, the PTT line from the TNC goes through the 2k resistor
to the TRS Tip, along with the transmit audio which is passed
through the 10uf DC blocking capacitor.? Receive audio from the
radio (TRS ring) is a direct connection to the TNC.? Ground /
Shield is common to both.
The trick is what is shown in the diagram to parallel the TRS
and mini-DIN connectors, giving access to the VHF FM modes as
well.? The 847 splits these out, and uses a different interface
scheme for the DIN connector, keeping PTT separate from the
audio circuit.?
Do note that you cannot use the CAT interface for keying the
radio.? The 847, for some bizarre reason, assumes the microphone
jack as the source when CAT is keying the rig, instead of either
of the rear jacks (TRS or DIN).? If you use CAT, you will find
you are able to key the rig, but have no audio transmitted.? I
had to use a separate USB-Serial dongle on my Raspberry Pi for
PTT, attaching one of its modem control lines (DTR / RTS)
through a buffer circuit.? I expect the RigExpert has this
built-in, so when configuring your software you need to make use
of the RigExpert's PTT feature and not the direct CAT interface.
Hope this helps,
Greg? KO6TH
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One other question... what do the circles attached with dotted lines represent in the diagram??
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Yes, You can. "+" sign means electrolytic
Alex LY4SA
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Thanks for the replies. I don't have much experience in tackling these kind of jobs but I do have a connector cable lying around that I used to use to connect a Timewave Navigator with a Kenwood TS-570 a few years ago. I'm going to use this as teh basis for the 847/Ti-3000 cable. Can I use an electrolytic capacitor as a blocking capacitor..??
Andy EI8KF
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That gives me an idea, Greg.? I wonder if I can add the blocking cap and resister to my radio internally between the TRS and the mini-DIN and just use the mini-DIN plug with my rigblaster plug-n-play?
73, Mike - W1MI
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On Tue, Nov 16, 2021 at 07:25 PM, Greg D wrote:
I've not used the RigExpert, but have interfaced a Raspberry Pi to the 847.? The diagram looks good, at least on the 847 side.
The TRS jack is used for the HF (SSB) modes.? As shown in your diagram, the PTT line from the TNC goes through the 2k resistor to the TRS Tip, along with the transmit audio which is passed through the 10uf DC blocking capacitor.? Receive audio from the radio (TRS ring) is a direct connection to the TNC.? Ground / Shield is common to both.
The trick is what is shown in the diagram to parallel the TRS and mini-DIN connectors, giving access to the VHF FM modes as well.? The 847 splits these out, and uses a different interface scheme for the DIN connector, keeping PTT separate from the audio circuit.?
Do note that you cannot use the CAT interface for keying the radio.? The 847, for some bizarre reason, assumes the microphone jack as the source when CAT is keying the rig, instead of either of the rear jacks (TRS or DIN).? If you use CAT, you will find you are able to key the rig, but have no audio transmitted.? I had to use a separate USB-Serial dongle on my Raspberry Pi for PTT, attaching one of its modem control lines (DTR / RTS) through a buffer circuit.? I expect the RigExpert has this built-in, so when configuring your software you need to make use of the RigExpert's PTT feature and not the direct CAT interface.
Hope this helps,
Greg? KO6TH
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Hi... The schematic diagram is 100% working. I have a RigExpert TI-5000 with a selfmade cable using it with my FT-847. I am not using PKT, but all other stuff works just as it should You can ask me if any help is needed or contact directly via e-mail?or messenger
Alex LY4SA
I've not used the RigExpert, but have interfaced a Raspberry Pi to
the 847.? The diagram looks good, at least on the 847 side.
The TRS jack is used for the HF (SSB) modes.? As shown in your
diagram, the PTT line from the TNC goes through the 2k resistor to
the TRS Tip, along with the transmit audio which is passed through
the 10uf DC blocking capacitor.? Receive audio from the radio (TRS
ring) is a direct connection to the TNC.? Ground / Shield is common
to both.
The trick is what is shown in the diagram to parallel the TRS and
mini-DIN connectors, giving access to the VHF FM modes as well.? The
847 splits these out, and uses a different interface scheme for the
DIN connector, keeping PTT separate from the audio circuit.?
Do note that you cannot use the CAT interface for keying the radio.?
The 847, for some bizarre reason, assumes the microphone jack as the
source when CAT is keying the rig, instead of either of the rear
jacks (TRS or DIN).? If you use CAT, you will find you are able to
key the rig, but have no audio transmitted.? I had to use a separate
USB-Serial dongle on my Raspberry Pi for PTT, attaching one of its
modem control lines (DTR / RTS) through a buffer circuit.? I expect
the RigExpert has this built-in, so when configuring your software
you need to make use of the RigExpert's PTT feature and not the
direct CAT interface.
Hope this helps,
Greg? KO6TH
EI8KF wrote:
I recently
bought a RigExpert Ti-3000 to use with my Icom IC-7000 but I'd
also like to use it with my 847. Unfortunately RigExpert don't
make a suitable cable for the 847, no idea why, but they have
given me a diagram explaining how to build one.
Has anyone any experience with building a cable and can explain
how to connect the 3.5mm jack?
|
I've not used the RigExpert, but have interfaced a Raspberry Pi to
the 847.? The diagram looks good, at least on the 847 side.
The TRS jack is used for the HF (SSB) modes.? As shown in your
diagram, the PTT line from the TNC goes through the 2k resistor to
the TRS Tip, along with the transmit audio which is passed through
the 10uf DC blocking capacitor.? Receive audio from the radio (TRS
ring) is a direct connection to the TNC.? Ground / Shield is common
to both.
The trick is what is shown in the diagram to parallel the TRS and
mini-DIN connectors, giving access to the VHF FM modes as well.? The
847 splits these out, and uses a different interface scheme for the
DIN connector, keeping PTT separate from the audio circuit.?
Do note that you cannot use the CAT interface for keying the radio.?
The 847, for some bizarre reason, assumes the microphone jack as the
source when CAT is keying the rig, instead of either of the rear
jacks (TRS or DIN).? If you use CAT, you will find you are able to
key the rig, but have no audio transmitted.? I had to use a separate
USB-Serial dongle on my Raspberry Pi for PTT, attaching one of its
modem control lines (DTR / RTS) through a buffer circuit.? I expect
the RigExpert has this built-in, so when configuring your software
you need to make use of the RigExpert's PTT feature and not the
direct CAT interface.
Hope this helps,
Greg? KO6TH
EI8KF wrote:
toggle quoted message
Show quoted text
I recently
bought a RigExpert Ti-3000 to use with my Icom IC-7000 but I'd
also like to use it with my 847. Unfortunately RigExpert don't
make a suitable cable for the 847, no idea why, but they have
given me a diagram explaining how to build one.
Has anyone any experience with building a cable and can explain
how to connect the 3.5mm jack?
|
I recently bought a RigExpert Ti-3000 to use with my Icom IC-7000 but I'd also like to use it with my 847. Unfortunately RigExpert don't make a suitable cable for the 847, no idea why, but they have given me a diagram explaining how to build one.
Has anyone any experience with building a cable and can explain how to connect the 3.5mm jack?
|
In message <CAKi7SJHkXAA4HSgMFXCaX9op62+t8uXsNkQdne1gbnc=S=O-5w@...>, Hal Dale <wb4aeg@...> writes Bought my 847 new in in the 90's I think.. I love it....It's a early
model....On air all most daily...Hal/WB4AEG
On Tue, Nov 2, 2021 at 10:14 AM Rob <g4ujs@...> wrote:
This list has 158 members....and super quiet, I guess 158 people
totally happy with their FT-847's
I am
73 de Rob G4UJS I got mine 2nd hand in the late 90s. I've just fired it up on 4m for a sked. I only really use it for 4m and 6m these days and as a 432 MHz IF for 13cm and 9cm. I do use it for general coverage receive on SW and VHF/UHF. Some day I'll get it back onto TopBand, which is the only SW band I'm interested in. The only faults I've had are the notorious on/off switch, the CW key socket coming loose off the board and a 21MHz fault due to a blown band switch diode. I did the high power capacitor mod for 4m while I was fixing that one. I also replaced the hard wired battery with a holder too. Brian GM4DIJ -- Brian Howie
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Re: International Space Station (ISS)
Hi Rob,
Good question! It’s a great rig but as you know it’s also older technology. Personally, I would start with the user’s manual. It has a pretty complete description of how to use the FT847 in satellite mode. I would print out the pages in the satellite chapter and probably also the chapter on memory operation if you haven’t used the memory functions so that you have the info in front of you as you set up the rig. If you don’t have a manual let me know via email (either call is good in QRZ) and I can send you a pdf. My mint condition 847 is retired and sitting on a shelf as a backup rig now that I have the 7300/9700 pair so once you get the basic set up going someone else who is actively using the rig may be in a better position to assist you with any tweaks that my be helpful specifically for the ISS. Good luck working the “birds” and cheers from an American ham of 58 years living in France.
Rob ?W2RSB | F4WCM
Rob Burke 137 bd de la République 92420 Vaucresson FRANCE Mobile: +33 (0)6 30 33 18 48 eMail: robinsburke@...
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Re: International Space Station (ISS)
On Thu, Nov 11, 2021 at 03:34 AM, Rob wrote:
Any guidance would be appreciated.
HI "Yes for all"... ;-) Check here for the pdf FT847 manual /g/YaesuFT847/files73
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International Space Station (ISS)
Hi
I've never used the satellite facility on the FT-847.
How does one set it up to work through the FM Repeater on the ISS. Is it possible to save the CTCSS Tone on the uplink?
Any guidance would be appreciated.
Regards
Rob G4UJS
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Bill
Brian Howie GM4DIJ
Frank