Date   

Re: DUO-ART SWR tripout #duo-art

Kevin Larcombe
 

Does it happen at all power levels?

For example, if you select 5dB of attenuation on the ART120 does it still do it?


From: EladSDR@groups.io <EladSDR@groups.io> on behalf of Bob W0EG <morrisnc7@...>
Sent: 28 June 2021 14:47
To: EladSDR@groups.io <EladSDR@groups.io>
Subject: Re: [EladSDR] DUO-ART SWR tripout #duo-art
 
Attached is a plot of my 20m antenna.  VSWR could not be better.


Re: DUO-ART SWR tripout #duo-art

Kevin Larcombe
 

I would be tempted to try a line isolator, or at least a number of clip-on ferrites near the amplifier. I do appreciate you described that it's all grounded well.


From: EladSDR@groups.io <EladSDR@groups.io> on behalf of Bob W0EG <morrisnc7@...>
Sent: 28 June 2021 14:47
To: EladSDR@groups.io <EladSDR@groups.io>
Subject: Re: [EladSDR] DUO-ART SWR tripout #duo-art
 
Attached is a plot of my 20m antenna.  VSWR could not be better.


Re: DUO-ART SWR tripout #duo-art

Bob W0EG
 

Attached is a plot of my 20m antenna.  VSWR could not be better.


Re: DUO-ART SWR tripout #duo-art

Bob W0EG
 

Well, this is all very discouraging.  I would not accept this from a major company like ICOM or Kenwood.  However, because Elad is a small and innovative firm, I am willing to work with them if they say this performance can be corrected by new firmware or even hardware mods. For now, I am only concerned with he HI SWR error and will defer the remote operation until later as I also have an IC-7300 for remote. 

I did just open a support ticket so I'[ll see what response I get. 


Re: DUO-ART SWR tripout #duo-art

Kevin Larcombe
 

Unfortunately, It's nothing that can be fixed. it's all down to the design.

The remote functionality appears to be an afterthought, which involves swapping the three USB cables to a different configuration and changing a couple of parameters in the menu when switching from remote to local. I even thought about having some sort of USB switch to enable me to reconfigure without unplugging cables. I tried a couple of USB hubs, and it all seemed a bit flaky. Even if I was to control that remotely I would still have to change the menu settings on the front of the ART120 locally.

Leaving it permanently in remote configuration was not an option for me, as it meant the loss of a lot of functionality that was available locally in SW2. I actually never got the remote software to work, I tried it on two PCs and both were the same. I was going to try it with Linux but gave up on it in the end.

The developer of the remote software was extremely helpful, he offered lots of advice. I followed his advice and provided him screen shots, he couldn't offer me a fix but did offer to log in remotely and look at it for me. By this time, due to the limitations with using the remote software as a permanent solution and the reconfiguring if I wanted to alternate, I went out and bought an IC-7300 to use for remote.

I had intended putting the FDM-DUO and the ART120 in my 19" rack which is on the other side of the room, but due to the lack of proper integration with SW2 that isn't possible. Instead, they have to sit on the desk in front of you. The main things that stopped my plan for fitting them in the rack was:
  • ART120 alarms such as "High SWR" only displayed on the front of the ART and not in SW2.
  • Alarms cannot be reset from SW2, it has to be done on the ART120 front panel.
  • No status monitoring in SW2 of the ART120 at all.
  • Profiles cannot be switched in SW2.
  • Antennas cannot be switched in SW2.
  • Tuner cannot be controlled in SW2.
  • Power setting cannot be controlled in SW2.
  • Parameters such as Mic gain, Compression etc cannot be changed in SW2, only for the advanced TX window.
It looks like the developers got so far with a very promising set of products, then ran out of money to finish it off. I'm not sure how much of this could be achieved, but I understand the ART120 doesn't support CAT commands.

Kevin GW0PUH




From: EladSDR@groups.io <EladSDR@groups.io> on behalf of la1rq via groups.io <la1rq@...>
Sent: 28 June 2021 05:23
To: EladSDR@groups.io <EladSDR@groups.io>
Subject: Re: [EladSDR] DUO-ART SWR tripout #duo-art
 

Have you ever tried to raise a support ticket @ http://eladit.com/en/support.php ?

I have good experience with remote service on the Duo-art 120.


LA1RQ 


Re: DUO-ART SWR tripout #duo-art

la1rq@...
 

Have you ever tried to raise a support ticket @ http://eladit.com/en/support.php ?

I have good experience with remote service on the Duo-art 120.


LA1RQ 


Re: DUO-ART SWR tripout #duo-art

Kevin Larcombe
 

I could never fix my intermittent SWR alarm problem with my OCF dipole, I sent a lot of time looking at the grounding and adding line isolators at both ends of the coax. My other radios worked without any problem, I ended up replacing the dipole.

I can't use the Elad on my inverted L with my remote ATU, the 5w from the FDM-DUO on its own is not enough to drive the remote tuner. Any attempt to use the ART120 amplifier (with internal tuner off) driving it as low as possible results in an immediate SWR failure alarm. The only way I have got it to work is by using my big 6dB attenuator inline to fool the ART120 into thinking it has a reasonable SWR, whilst giving enough level for the tuner to operate.

If I want to use the inverted L with the Elad-DUO/ART120 set-up, I have to switch to the IC-7300 to tune it, and again each time I move on the band. The Elad certainly has some annoying niggles, but most seem to be integration issues!

I'm very impressed with the performance, and it's the radio I use most in the shack, but it certainly has its flaws. 
  • The sensitive SWR alarm issue meaning I can't use it with my remote tuner.
  • The poor implementation of the remote facility. Swapping 3 USB cables around and changes in the menu to change between local/remote usage, means you have to make sure you plan before you leave the house, that's not a workable solution. (The Elad worked out to be very expensive for me. Remote operation was my main reason for purchasing it, but I then had to go and buy an IC-7300 for remote use)

  • The poor integration of transmit functionality into SW2. Most of the TX functions can only be accessed on the FDM-DUO itself which makes it look like TX functionality was a Friday afternoon add-on, and it had to be released on Monday. 

  • I have never really had any real success with the advanced TX window, I have never been able to totally get rid of the squeal when activating the PTT.
With hindsight, I would have chosen another solution.

Kevin GW0PUH


From: EladSDR@groups.io <EladSDR@groups.io> on behalf of gcoxuk@... via groups.io <gcoxuk@...>
Sent: 27 June 2021 22:50
To: EladSDR@groups.io <EladSDR@groups.io>
Subject: Re: [EladSDR] DUO-ART SWR tripout #duo-art
 
Hi Bob,
I too have this problem. I have not come to a conclusion nor any more information.
This and some other problems are driving me away from the unit…
Maybe someone can help?

Kr
Geoff
M7COX 


On 27 Jun 2021, at 18:41, Bob W0EG <morrisnc7@...> wrote:

New DUO-ART (used with FDM-DUO) is giving me  the "HI SWR error" on a good antenna.  Antenna is 1.13:1 or better across 20m.  Tuner function appears to work and end up below 1.13:1, but I still get the HI SWR error with tuner engaged.  I have and ICOM IC-7300 and a Kenwood TS-590S that both work well with this antenna with or without internal tuners.  All radios are grounded to a copper bus and antenna coax shield is grounded outside through a Polyphaser attached to a deep ground rod just before the cable enters the house. 

Anyone else having a issue like this?  Wondering if I have a defective unit.

Bob 
W0EG



Re: My new utility, satellite tracking (dde driver) with FDM-SW2 and Orbitron

a190003@...
 

Where can I download the utility? The links are not valid.


Re: DUO-ART SWR tripout #duo-art

Bob W0EG
 

Thanks for the reply and for letting me know that I am not the only one.  I am waiting for a reply from Paul at Elad support.  Could be that the SWR monitor was set way too sensitive.  When connected to my Bird dummy load, the ART will transmit through its tuner but not with any antenna.  


Re: DUO-ART SWR tripout #duo-art

gcoxuk@googlemail.com
 

Hi Bob,
I too have this problem. I have not come to a conclusion nor any more information.
This and some other problems are driving me away from the unit…
Maybe someone can help?

Kr
Geoff
M7COX 


On 27 Jun 2021, at 18:41, Bob W0EG <morrisnc7@...> wrote:

New DUO-ART (used with FDM-DUO) is giving me  the "HI SWR error" on a good antenna.  Antenna is 1.13:1 or better across 20m.  Tuner function appears to work and end up below 1.13:1, but I still get the HI SWR error with tuner engaged.  I have and ICOM IC-7300 and a Kenwood TS-590S that both work well with this antenna with or without internal tuners.  All radios are grounded to a copper bus and antenna coax shield is grounded outside through a Polyphaser attached to a deep ground rod just before the cable enters the house. 

Anyone else having a issue like this?  Wondering if I have a defective unit.

Bob 
W0EG



DUO-ART SWR tripout #duo-art

Bob W0EG
 

New DUO-ART (used with FDM-DUO) is giving me  the "HI SWR error" on a good antenna.  Antenna is 1.13:1 or better across 20m.  Tuner function appears to work and end up below 1.13:1, but I still get the HI SWR error with tuner engaged.  I have and ICOM IC-7300 and a Kenwood TS-590S that both work well with this antenna with or without internal tuners.  All radios are grounded to a copper bus and antenna coax shield is grounded outside through a Polyphaser attached to a deep ground rod just before the cable enters the house. 

Anyone else having a issue like this?  Wondering if I have a defective unit.

Bob 
W0EG



Re: Elad FDM Duo

Neil Smith G4DBN
 

Hi Ian, did you use the full install version of SW2? Have you tried the drivers in http://sdr.eladit.com/FDM-DUO/Drivers/USB_CAT_PORT/index.php?lang=EN

A quick search of the message archive shows a fair number of messages about USB CAT drivers.  It should be an FTDI USB Serial converter, and create a COM port once the driver is recognised. Do you see any unknown or erroring devices?

Visitors arriving here, so tied up now, I'm sure others can help.

Best to include the firmware versions and SW2 version when asking for help, you can get the versions from menu 84 on the DUO.

Neil

On 26/05/2021 22:48, ian Hatton (via Dropbox) via groups.io wrote:
Hi Guys
I have just purchased a 2nd hand Elad FDM Duo I have it up and running with FDM-sw2 software but cannot get the CAT to work once I plug the usb lead into the cat port it makes the bleep sound but does not search or install any drivers ??? I have tried different usb ports leads everything ?? just cant figure this one out no commport showing in device mangaer any help much appreciated
rgds Ian
_.


Re: Elad FDM Duo

Antony Watts
 

To use FDM-SW2 you only need one USB connection, to the RX port. This carries spectrum info to your PC display and CAT commands (tune, band etc) back to your DUO.

You can use the other two USB connections TX (digital audio in/out) and CAT (internal USB <-> TTL logic) separately from, for example, WSJT program to control the DUO.


Re: FDM-DUO rear panel

Paul Andrews
 

Andy,

Thanks so much.

73 - Paul - W2HRO

On Fri, Jun 25, 2021 at 10:09 AM Andy G4JNT <andy.g4jnt@...> wrote:
It works at 70MHz Tx on the 0dBm output perfectly well.   On Rx  a) don't forget to switch out the LP filter, and b) you need to filter out the alias response at 50.88MHz
See  http://www.g4jnt.com/FDM-DUO_at_VHF.pdf   for more about using this radio at 70 and 144MHz

More on the FDM-Duo generally at http://www.g4jnt.com/FDM-DUO_Notes.htm



On Fri, 25 Jun 2021 at 15:03, Paul Andrews <pandrews@...> wrote:
I plan to use my FDM-DUO at 70 MHz as an IF for a transverter.

In Europe will the FDM-DUO operate in the 70 MHz band?  Or is 50 MHz the hardware limit?

73 - Paul - W2HRO




On Fri, Jun 25, 2021 at 3:18 AM Tony EI8JK <ei8jk@...> wrote:
Hi Pierre
Yes the 0dB output works on all frequencies and is modulated by whatever mode you have selected. Very useful for connecting a transverter.
Tony, EI8JK

On 25/06/2021 04:26, Pierre FK8IH wrote:
Page 9 of user manual : 3 - RF Output Connector SMA 50 Ohm connector. 0dBm transmission signal.
Can I understand that a 0dBm transmission signal can always be taken from that SMA connector, even when the transceiver cannot transmit, for exemple when it is tuned out of a Ham Band?
73 - Pierre - FK8IH



--
Paul Andrews
SVP - Sales & Marketing
TelVue Corporation
1-800-885-8886 x102



--
Paul Andrews
SVP - Sales & Marketing
TelVue Corporation
1-800-885-8886 x102


Re: FDM-DUO rear panel

Andy G4JNT
 

It works at 70MHz Tx on the 0dBm output perfectly well.   On Rx  a) don't forget to switch out the LP filter, and b) you need to filter out the alias response at 50.88MHz
See  http://www.g4jnt.com/FDM-DUO_at_VHF.pdf   for more about using this radio at 70 and 144MHz

More on the FDM-Duo generally at http://www.g4jnt.com/FDM-DUO_Notes.htm



On Fri, 25 Jun 2021 at 15:03, Paul Andrews <pandrews@...> wrote:
I plan to use my FDM-DUO at 70 MHz as an IF for a transverter.

In Europe will the FDM-DUO operate in the 70 MHz band?  Or is 50 MHz the hardware limit?

73 - Paul - W2HRO




On Fri, Jun 25, 2021 at 3:18 AM Tony EI8JK <ei8jk@...> wrote:
Hi Pierre
Yes the 0dB output works on all frequencies and is modulated by whatever mode you have selected. Very useful for connecting a transverter.
Tony, EI8JK

On 25/06/2021 04:26, Pierre FK8IH wrote:
Page 9 of user manual : 3 - RF Output Connector SMA 50 Ohm connector. 0dBm transmission signal.
Can I understand that a 0dBm transmission signal can always be taken from that SMA connector, even when the transceiver cannot transmit, for exemple when it is tuned out of a Ham Band?
73 - Pierre - FK8IH



--
Paul Andrews
SVP - Sales & Marketing
TelVue Corporation
1-800-885-8886 x102


Re: FDM-DUO rear panel

Paul Andrews
 

I plan to use my FDM-DUO at 70 MHz as an IF for a transverter.

In Europe will the FDM-DUO operate in the 70 MHz band?  Or is 50 MHz the hardware limit?

73 - Paul - W2HRO




On Fri, Jun 25, 2021 at 3:18 AM Tony EI8JK <ei8jk@...> wrote:
Hi Pierre
Yes the 0dB output works on all frequencies and is modulated by whatever mode you have selected. Very useful for connecting a transverter.
Tony, EI8JK

On 25/06/2021 04:26, Pierre FK8IH wrote:
Page 9 of user manual : 3 - RF Output Connector SMA 50 Ohm connector. 0dBm transmission signal.
Can I understand that a 0dBm transmission signal can always be taken from that SMA connector, even when the transceiver cannot transmit, for exemple when it is tuned out of a Ham Band?
73 - Pierre - FK8IH



--
Paul Andrews
SVP - Sales & Marketing
TelVue Corporation
1-800-885-8886 x102


Re: FDM-DUO - 1 or 2 antenna connectors

Neil Smith G4DBN
 

Hi Pierre, when Antennas 1 is selected, the RX is connected to the TX/RX connector in receive mode. When Antennas 2 is selected, the RX is connected to the RX only connector in receive mode.

See the diagram in this message:

https://groups.io/g/EladSDR/message/17200

Neil G4DBN

On 6/25/21 4:38 AM, Pierre FK8IH wrote:

[Edited Message Follows]

Things are clear in my mind when in Menu 33 Antennas 1 antenna is chosen : the antenna is fed by the transmitter or it feeds the receiver.
But when 2 antennas are chosen, for exemple a wide band antenna for the receiver and a finely tuned antenna for the transmitter, what happens? Are both antennas connected in the same time to the transmitter and the receiver? Is the receiver still working when the transmitter is tranmitting or some part of the circuit has cut its electrical supply to mute it?
73 - Pierre - FK8IH


Re: FDM-DUO rear panel

Klaus Brosche, DK3QN
 

As Tony has already written, the 0 dBm output has no band limits.

However, you need to set menu 33 (TXOUT) accordingly to make the 0 dBm port active.

Menu 31 is "number of antennas used".

73, Klaus, DK3QN


Am 25.06.2021 um 05:26 schrieb Pierre FK8IH:

Page 9 of user manual : 3 - RF Output Connector SMA 50 Ohm connector. 0dBm transmission signal.
Can I understand that a 0dBm transmission signal can always be taken from that SMA connector, even when the transceiver cannot transmit, for exemple when it is tuned out of a Ham Band?
73 - Pierre - FK8IH



Re: FDM-DUO - 1 or 2 antenna connectors

GLENN NUTSEY <glennnutsey@...>
 

Hi,

I use a Wellbrook Loop exactly for this purpose with my Duo. I can then switch between the two antennas via the SW. 

ENJOY 


On 25 Jun 2021, at 08:25, Tony EI8JK <ei8jk@...> wrote:

 The receive antenna works the same as all other tranceivers with an RX antenna socket. The RX socket is as you would expect, that is it is not connected when you TX and never gets any transmitted RF output. So you can safely connect an amplified receive antenna  without any worries.
Tony, EI8JK.

On 25/06/2021 04:38, Pierre FK8IH wrote:
Things are clear in my mind when in Menu 33 Antennas 1 antenna is chosen : the antenna is fed by the transmitter or it feeds the receiver.
But when 2 antennas are chosen, for exemple a wide band antenna for the receiver and a finely tuned antenna for the transmitter, what happens? Are both antennas connected in the same time to the transmitter and the receiver? Does the receiver is still working when the transmitter is tranmitting or some part of the circuit has cut its electrical supply to mut it?
73 - Pierre - FK8IH


Re: FDM-DUO - 1 or 2 antenna connectors

Tony EI8JK
 

The receive antenna works the same as all other tranceivers with an RX antenna socket. The RX socket is as you would expect, that is it is not connected when you TX and never gets any transmitted RF output. So you can safely connect an amplified receive antenna  without any worries.
Tony, EI8JK.

On 25/06/2021 04:38, Pierre FK8IH wrote:
Things are clear in my mind when in Menu 33 Antennas 1 antenna is chosen : the antenna is fed by the transmitter or it feeds the receiver.
But when 2 antennas are chosen, for exemple a wide band antenna for the receiver and a finely tuned antenna for the transmitter, what happens? Are both antennas connected in the same time to the transmitter and the receiver? Does the receiver is still working when the transmitter is tranmitting or some part of the circuit has cut its electrical supply to mut it?
73 - Pierre - FK8IH

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