• 5
  • Problem
  • Updated 11 months ago
  • Acknowledged

I am the NCS of the International DSTAR HF Testing Net that meets 5 times a week. I’ve been doing this for over 4 years. I have a ICOM 9100, two ICOM 7100’s and a FLEX 6500 with the DV3000 USB drive.

 I have 5-7 FLEX 6000 series radios on the nets out of 15-25 total

 I don’t know who did the hardware or software engineering for DSTAR on the FLEX. Nor the testing. But with about 2 weeks of real use, below are some of the quirks, issues that should be looked into.

 Compared to either ICOM DSTAR radio, the audio sounds low in strength/modulation. When someone tries to drive it higher, the audio starts “clipping”. A VERY obvious difference between ICOM and FLEX.

  1. Compared to either ICOM DSTAR radio, the audio sounds has more BASS, even with the tone controls set to flat.

  2. The set receive bandwidth of 9khz seems way to wide.

  3. The set bandwidth of 9khz cannot be narrowed easily.

  4. When you set a band for DSTAR. The software does not remember this, like other modes and it always reverts to SSB. When you turn off the radio, then back on, pick a band, it is on SSB, not a nice and quiet DSTAR mode.

  5. The receive decode success of the FLEX on DSTAR seems less than either ICOM DSTAR radio. WE all hoped for a much better decode rate with the FLEX/DV3000.

 Many of us with FLEX and 9100’s would like to sell our 9100’s, The FLEX DSTAR combo is not up to par yet.




International DSTAR HF Testing NetSUMMER Schedule

Use your ICOM 9100/7100, or STAR Boarded non ICOM DSTAR HF, or the FLEX 6000 SERIES SDR radios with a 3000 DSTAR USB adapter.

We routinely have two way communications coast to coast and North to South, South to Canada, Europe and Australia. We have had two way contacts to Japan. And have been heard in South Africa.

We are on each band only for 2-5 min. or so as to spend less time, if the band is dead we move on earlier. You can go back to a good freq after the net.
MONITOR REF030C to coordinate. WE may need to move early or if the freq is busy. We do not want to step on any AM or SSB activity.

We also use a web page to keep track of who and where we are at -     http://hf.dstar-relay.net/

You also can check-in to this web site anytime 24/7 to find a DSTAR HF Ham to talk to.

We will have a PRENET for 30 min. before the start of the scheduled time. This PRENET is for ‘FREE FORM” contacts. One should check the web site  http://hf.dstar-relay.net/  sign in and find a working freq to work on. When the net starts at the scheduled time, please join the net and follow the freqs.

We have a post-net (Hot Wash) at the end, on REF030C and report on our 1 way and 2 way contacts. This is done by the QUICK KEY method.


Sat PM 7:00 E (2300Z)

Sunday AM 10:00 E (1400Z Sunday)(Spend more time on each open band, and start on 80m)      Sunday PM 7:00 E (2300Z)

Tuesday and Thurs night at 8:30pm E (0030Z Wed and Fri)

Check USB/LSB on freq to make sure the freq is clear.
SUNDAY AM, we start with 80m and work towards 6 meters.

6 mtrs 51.180 DV for 2 mins

10 mtrs 29.480 DV for 2-5 mins

12 mtrs 24.938 DV for 2-5 mins

15 mtrs 21.380 DV for 2-5 mins

17 mtrs 18.148 DV for 2-5 mins

20 mtrs 14.325 DV for 2- 5 mins

40 mtrs 7.285(or another open freq) DV for 2- 5 mins

75 mtrs 3.880 DV for 5 mins Backup is around 3.725.

NCS will check the freq ahead of time to make sure we don’t step on anyone 3KC up and DOWN.

See how to do DSTAR HF with an ICOM at-   https://www.youtube.com/watch?v=oGF-qkdoid4

 "Digital voice is defined in the Commission’s rules as voice (i.e. phone), not data, per Section 97.3(c)(5) of the Rules." Check out the most recent comments by the ARRL:  http://apps.fcc.gov/ecfs/document/view?id=7521063715
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Kent Hufford

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Posted 4 years ago

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Tim - W4TME, Customer Experience Manager

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Official Response
I have entered this report into our bug tracker for further investigation.  Please report any additional information related to this specific issue in this community topic.