Wednesday, June 3, 2020

xHE-AAC decoder for DReaM

We have heard lots about how great xHE-AAC is, yet there have been significant hurdles to getting a version of DReaM to decode it. @zefie has solved many of those problem here. Be sure to read his caveats, but great work!

Monday, April 27, 2020

KTWR DRM schedule update and VOACAP plots

Schedule changes highlighted in yellow:

1026-1056 11995kHz GUAM 90 kW 315° CIRAF 45 Wed

1230-1245 7500kHz GUAM 90 kW 320°CIRAF 45 Thu [ends 3 May]

1026-1056 15200kHz GUAM 90 kW 285°CIRAF 41 Sun

1245-1315 UTC 7500 kHz   TWR GUAM 90 kW 320° CIRAC 45 (Sun) [begins 3 May]


VOACAP plots courtesy of Brother Zyg!

Thursday, April 16, 2020

DRM Broadcast Schedules Updated

From the DRM consortium:

"The new broadcast schedules, until October 24, 2020, are now available on the DRM website...  Please let the Project Office know of any changes as we rely on our members and supporters in making sure the schedules are accurate and updated.  Please send changes to: Our thanks to Jeff Cohen for compiling the data."

Friday, March 13, 2020

NASB 2020 Postponed

Just got this from Jeff White of WRMI:

IMPORTANT ANNOUNCEMENT:  The CEO of EWTN, owner of WEWN shortwave, announced on March 13 that they will not be able to host any meetings in the near future due to the COVID-19 coronavirus situation.  As of now, there is no way to know how long the virus is going to be around or how transmittable it may become, so we are trying to take appropriate measures.  NASB Board member Glen Tapley of WEWN said:  "As much as we are looking forward to hosting the meeting and getting together with everyone, we are going to have to hold off on hosting NASB.  Travel plans of attendees should not be finalized at this point.  We will stay in contact and keep an eye on the coming weeks and months and hopefully be able to host NASB later this year."  So please do not make airline or other travel reservations, at least until we are able to announce new plans later this year.  For those who have already made reservations, we hope that you will be able to cancel or change them due to the coronavirus circumstances.  We are sorry for this change of plans, but we hope that the situation will soon improve. 

Wednesday, February 5, 2020


Updates to the Radio Marti DRM broadcasting test:

Frequency is 7345 kHz from 1700-0200 UTC.

Reception reports today came in from Georgia, Florida, Washington, Dominican Republic, and Colombia.

Current testing has it in 64 QAM with Radio Marti on one audio service and VOA on another audio service. The bit rate for VOA is really low.

Depending on reception reports, they may drop to 16 QAM and only run one audio service. Using the xHE-AAC codec means some people cannot decode the audio, but it saves lots of bits! The Gospell and Avion receivers currently available should have no problem with audio decoding.

Brother Zyg also reports:

1. I am receiving the DRM transmission on 7345 kHz here in the Atlanta area even though my shortwave antenna was blown down very recently and is lying on the ground in several pieces!  The Screen ID shows two separate audio streams, Radio Marti and Voice of America.

2. I cannot decode the audio because it is using the latest xHE mode and the Dream software does not have that capability.

3. The KiwiSDR web receivers do have the xHE decoders (DRM extension) and I have listened to the audio on several KiwiSDR receivers in the SE USA.   

Here are Zyg's hour by hour VOACAP plots:

[Gospell display photo from @SWWINB]