Amateur Radio IC-705

IC-705 WLAN doppler with OmniRig PstRotator

I got the PstRotator to work with OmniRig and IC-705 over WLAN. I’m using ”Icom Remote Utility” on Windows to set up the virtual COM-port. And I’m setting up OmniRig like this:

I had several problem getting the OmniRig to communicate with IC-705 via WLAN, but after re-installing to the OmniRig supplied with PstRotator (v1.18) I got it working OK. It is also working from SDR-Console V3.

So now it is possible to do doppler control of the IC-705 without any cables for true portable operations! See short video below:

Amateur Radio

FT8 20 meter 2021-03-28

My signal heard on almost all continents. 8 watt with IC-705, antenna EFHW. Band: 20 meter, 2021-03-28 daytime UTC. IC-705 connected to PC/WSJT-X via Wifi.

Amateur Radio IC-705

AX.25 APRS with UISS and IC-705

This is a very fast guide to set up the IC-705 with UISS for sending AX.25 packets and APRS.

  1. Download and install UISS. During installation, install the Soundmodem software TNC.
  2. Download the file ptt-dll.zip from Soundmodem webpage. Unzip and copy the files to your UISS folder.
  3. Change the CI-V address on your IC-705 to 94h as we have to use the settings for IC-7300 in Soundmodem.
  4. Set the radio to FM-D (Data) and select the frq for APRS (in Sweden 144.800 MHz).
  5. Start UISS
  6. Setup UISS with your callsign and your location:

  7. In Soundmodem, set the Sound Card device to your IC-705 USB audio card.

  8. In Soundmodem, set the PTT Port to CAT and radio IC7300. The COM-port should be the one that IC-705 uses for CI-V.

  9. Now you should be able to see traffic

  10. Now send your first APRS Position. Use digipeater if you like.
    The IC-705 now sends your APRS location.

  11. If everything is OK you should be seen on aprs.fi
Amateur Radio

Rot2Prog powered with Dell 19.5V adapter

Important update!
When using automatic control from PC then both the elevation and azimut is controlled (moved) at the same time. It seems that the Dell power adapter can not handle the current amp spike and turns off (overload protection I guess).

I have now return to using my 13.5 volt power supply.

I have been powering my Rot2Prog rotor controller for my RAS rotor with 13.5 volt. This means that the rotor turns slow. My 13.5 volt power supply also has a very high idle consumption of 10 watts.

I changed the power supply to a standard Dell power adapter – LA130PM121 19.5V 6.7A PA-1131-28D1 130W. It can be found very cheap. I just cut off the power plug and connected the wires from the Dell adapter to the Rot2Prog controller wires.

Now the turning goes MUCH faster! The Dell adapter also has a very low idle consumption – under 0.5 watt. So it can be connected all the time. What I can see there is no interference from the adapter on VHF and UHF.

I highly recommend using the Rot2Prog controller with an old computer adapter. Below is a short video of how fast it is turning.


IC-705 operation and satellite memories

Please see the following posts at AMSAT-SM about IC-705 satellit operation and memory files/settings:


IC-705 Mic 3V or 8V?

In IC-705 it is possible to set the MIC output voltage to 8V instead of default 3V. I have done some tests and I do not hear any difference with the standard microphone HM-243. What do you think?





Amateur Radio


Tested new mode today, JS8CALL, and got first QSO with SM4INV:

Read more and download at http://js8call.com/