Libre SDR

[G8YTZ]

Has anyone got the Ali Express Libre SDR working with the Portsdown on Tx?

I'm using F5OEO's firmware for the Libre, can be found here: https://github.com/F5OEO/tezuka_fw?tab=readme-ov-file.
Results are good using DATV-EASY, very impressive Tx MER, I'm seeing 35+ dB MER into GB3JV, vs 30dB for the same field strength using the Lime. Works fine with Portsdown Band Viewer. Also has Ethernet, flash storage and Micro SD Card, so you don't have to flash when testing.

For Portsdown Tx the firmware reports as not compatible, though it des try to Tx. so perhaps this is just a Portsdown. Experiments so far are with USB, not tried Ethernet.

Has excellent frequency stability, 2 x Tx and 2 x Rx, so full duplex ok + external reference input, solid aluminium case.
47.5MHz - 6GHz, 16MHz BW all for £150 delivered, tax paid.

[g0mjw]

I suggest you stick to the standard firmware, then it behaves like a Pluto and anyone considering building a PD4, stick to the standard supported hardware. Don't be cheap, unless you can afford it.

As you have discovered, with tezuka the LibreSDR will work with SDR Console and SDR Television but that won't help with the PD4. You can't install the Pluto 0303 on the LibreSDR, at least I don't think you can, and I don't know if Evariste plans to migrate that over, but I suspect not.

If you want Dave to support the LibreSDR, which will be a long shot given all the work required, he will need to have one to test with.

The performance I have seen on SDR TV is OK and it is a good price. I think there may be several variants of it.

Mike

[DL5BCA]

Hello,

I've also ordered one and think it will support the SDR console and upcoming DATV implementations in the future.

Simon is already testing it, see here and the following blog posts: https://www.sdr-radio.com/libresdr

73 Thomas DL5BCA