RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Amateur Radio > Making Contacts / On the Air


Making Contacts / On the Air - Have a question about getting on the air or how to make a contact? Just want to brag about your latest DX contact or contest score? This is the forum for you.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 07-24-2018, 11:55 PM
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
 
Join Date: Aug 2007
Location: New Knoxville, Ohio
Posts: 14
Default Strange sounds from an Icom R75

I do hope I am posting this in the right section.

Heard this around 12:30 to 1am on Monday morning July 23 using Ham Radio Deluxe (free) software. 7.074khz, 3.573khz, (all LSB) and a few other frequencies. In the comment section of the software was "FT8 sent:+02 Rcvd: -05." Near the end of the clip you can hear me change from LSB to USB then to CW, etc. but not necessarily in that order. Can someone tell me what I am hearing? Can this be decoded?
Here is a link to the audio via Youtube. (I hope that is acceptable) I am of the opinion that I didn't have my radio tuned to the exact frequency or I may have been in the wrong mode. But I heard it on 160 meters, 80 meters, and 40 meters on several different frequencies.

https://www.youtube.com/watch?v=PvFh2qwxGVM


Thanks
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 07-25-2018, 1:03 AM
krokus's Avatar
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Jun 2006
Location: Southeastern Michigan
Posts: 3,351
Default

Quote:
Originally Posted by sheldonk View Post
I do hope I am posting this in the right section.

Heard this around 12:30 to 1am on Monday morning July 23 using Ham Radio Deluxe (free) software. 7.074khz, 3.573khz, (all LSB) and a few other frequencies. In the comment section of the software was "FT8 sent:+02 Rcvd: -05." Near the end of the clip you can hear me change from LSB to USB then to CW, etc. but not necessarily in that order. Can someone tell me what I am hearing? Can this be decoded?
Here is a link to the audio via Youtube. (I hope that is acceptable) I am of the opinion that I didn't have my radio tuned to the exact frequency or I may have been in the wrong mode. But I heard it on 160 meters, 80 meters, and 40 meters on several different frequencies.

https://www.youtube.com/watch?v=PvFh2qwxGVM


Thanks
Sounds like PSK31, but with a bit of multipath, or even auroral, propagation.

Sent using Tapatalk
__________________
Generic radio geek, in southeast Michigan.
PSR-500, TM-742, TM-V71,TH-78, HTX-420, IC-2AT, IC-2E (clone), Pro-39, BC-235XLT, TK-290, XTS-5000
Reply With Quote
  #3 (permalink)  
Old 07-25-2018, 6:01 AM
dragonball's Avatar
Member
   
Join Date: Jun 2004
Posts: 50
Default Strange sounds from an Icom R75

https://sourceforge.net/projects/fldigi/files/fldigi/
download that
Reply With Quote
  #4 (permalink)  
Old 07-25-2018, 10:05 PM
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
 
Join Date: Aug 2007
Location: New Knoxville, Ohio
Posts: 14
Default

Thanks for the replies. I've spent about an hour listening to sound clips on various sites and came up with nothing. Thanks for the software suggestion. I'll give it a try.
Reply With Quote
  #5 (permalink)  
Old 07-25-2018, 11:19 PM
mm mm is offline
Member
   
Join Date: Dec 2002
Posts: 576
Default

FLDIGI will not decode because that is FT8, transmitted with either wsjt-x or jtdx software.

You can use 2 software programs either WSJT-X or JTDX to decode it with your R75 set to USB, UPPER SIDEBAND mode only.

see wsjt-x, FT8 SUBMODE below.
WSJT-X User Guide

software
https://www.jtdx.tech/en/
or
https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

You will also need an interface such as the SIGNALINK or similar modem.
SignaLink USB Interface

and a NTP clock program.
https://www.meinbergglobal.com/engli...htm#ntp_stable



Some of the exact FT8 HF feq's in MHz all in usb mode are 1.840, 3.573, 7.074, 10.136, 14.074, 18.100, 21.074, 24.915, 28.074, 50.313,

FT8, 2-way contacts are really basic 15 second transmissions with the 15 seconds containing either CQ'S with callsigns or both callsigns and signal strengths along with maiden head grid locators.

Successful contacts are boring and very basic consisting of both station callsigns with a received signal strength report similar to W1JT W1AA R-12, and CONTACTS ending with both stations callsigns an a 73 but there are no real conversation messages transmitted only these fast quick qso messages.
Reply With Quote
Sponsored links
  #6 (permalink)  
Old 07-27-2018, 8:11 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Jan 2003
Location: NC, USA
Posts: 196
Default

Then add GridTracker to the mix of software and sit back and watch the magic!

https://tagloomis.com/grid-tracker/

It is really awesome watching the transmissions going back and forth around the world!
Reply With Quote
  #7 (permalink)  
Old 07-28-2018, 7:30 AM
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
 
Join Date: Aug 2007
Location: New Knoxville, Ohio
Posts: 14
Default

Quote:
Originally Posted by mm View Post
FLDIGI will not decode because that is FT8, transmitted with either wsjt-x or jtdx software.

You can use 2 software programs either WSJT-X or JTDX to decode it with your R75 set to USB, UPPER SIDEBAND mode only.

see wsjt-x, FT8 SUBMODE below.
WSJT-X User Guide

software
https://www.jtdx.tech/en/
or
https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

You will also need an interface such as the SIGNALINK or similar modem.
SignaLink USB Interface

and a NTP clock program.
https://www.meinbergglobal.com/engli...htm#ntp_stable



Some of the exact FT8 HF feq's in MHz all in usb mode are 1.840, 3.573, 7.074, 10.136, 14.074, 18.100, 21.074, 24.915, 28.074, 50.313,

FT8, 2-way contacts are really basic 15 second transmissions with the 15 seconds containing either CQ'S with callsigns or both callsigns and signal strengths along with maiden head grid locators.

Successful contacts are boring and very basic consisting of both station callsigns with a received signal strength report similar to W1JT W1AA R-12, and CONTACTS ending with both stations callsigns an a 73 but there are no real conversation messages transmitted only these fast quick qso messages.
Might be a little over my head but sounds intriguing. Doesn't hurt to do more research I guess. Not sure if it's worth it though.

Thank you
Reply With Quote
  #8 (permalink)  
Old 07-28-2018, 7:32 AM
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
 
Join Date: Aug 2007
Location: New Knoxville, Ohio
Posts: 14
Default

Quote:
Originally Posted by bagmouse7 View Post
Then add GridTracker to the mix of software and sit back and watch the magic!

https://tagloomis.com/grid-tracker/

It is really awesome watching the transmissions going back and forth around the world!

Thanks for the tip. I will check it out.
Reply With Quote
  #9 (permalink)  
Old 07-28-2018, 8:13 AM
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
 
Join Date: Aug 2007
Location: New Knoxville, Ohio
Posts: 14
Default

Thanks to all for the replies.

I found this and started decoding immediately.

https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

Very cool using GridTracker but it gets boring very quick.

Someone once said "it's not the kill, but the thrill of the chase"
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 11:10 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions