We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Author Topic: Birdies RX-888  (Read 1409 times)

Offline Triker

  • Newbie
  • *
  • Posts: 2
    • View Profile
    • Email
Birdies RX-888
« on: June 13, 2021, 1653 UTC »
I got my RX-888 yesterday.
Installation was quickly done.

But i was surprised how many birdies this little box has when connecting a 50 ohm load to the input.
https://imgur.com/a/JyAev5v
The RBW is around 122 Hz and when going up to 2 khz they disappear. But in my opinion this should not be.

Has anyone else discovered the same problem?

73 de Roland

« Last Edit: June 13, 2021, 1704 UTC by Triker »

Offline RobRich

  • DX Legend
  • ******
  • Posts: 1721
  • Tampa, FL USA
    • View Profile
Re: Birdies RX-888
« Reply #1 on: June 13, 2021, 1706 UTC »
I took a quick skim of the NextGenSDRs@groups.io group where the RX-888 is discussed frequently.

There is an updated RX888_extio_v0.5-release available.

https://groups.io/g/NextGenSDRs/topic/77958038

The download is a few posts down.

https://groups.io/g/NextGenSDRs/message/153

One user mentioned birdies disappearing when setting an 128MS/s sampling rate.

https://groups.io/g/NextGenSDRs/message/182
Tampa, FL USA | US Map Grid EL88
Airspy HF+ Discovery | KiwiSDR 2 | 2x Msi2500 Msi001 | 2x RTL-SDR V3 + NE602 | 2x RTL-SDR V4
148' Loop-on-Ground | 31' Vertical | 18' End-Fed Vertical | 9' NCPL | PA0NHC MiniWhip

Offline Triker

  • Newbie
  • *
  • Posts: 2
    • View Profile
    • Email
Re: Birdies RX-888
« Reply #2 on: June 13, 2021, 1718 UTC »
Thanks a lot. This did help. Still some of them but much less.
https://imgur.com/a/RqbNwey


73 de Roland
« Last Edit: June 13, 2021, 1746 UTC by Triker »

Offline RobRich

  • DX Legend
  • ******
  • Posts: 1721
  • Tampa, FL USA
    • View Profile
Re: Birdies RX-888
« Reply #3 on: June 14, 2021, 2307 UTC »
Looking much better. :)

Taking the next step, do you have any RF choking on your USB cable? There is a chance some birdies could be coming from the computer itself. Using an USB cable with RF choking and/or winding a few turns of an USB cable through an applicable ferrite can sometimes help.
Tampa, FL USA | US Map Grid EL88
Airspy HF+ Discovery | KiwiSDR 2 | 2x Msi2500 Msi001 | 2x RTL-SDR V3 + NE602 | 2x RTL-SDR V4
148' Loop-on-Ground | 31' Vertical | 18' End-Fed Vertical | 9' NCPL | PA0NHC MiniWhip