Would you buy a LimeSDR USB again


Hi - I was really excited to get my LimeUSB only to get a defective unit. I have had bad boards before but ready through the groups it seems quality production is a problem. I am trying to decide to get a refund or an exchange.

My purpose for this board is for experimentation in VHF UHF and above. Although HF and SW listening is important to me also. Was it a dream to think I could have it all in one board or should I go back to thinking about different boards for each segment? A single board to rule them all for Ham radio… :wink:

My question - if you had it to do all over again would you buy the LimeSDR or something else.


I did. I fried the USB/EXT power switching chip. This happened because of fluctuations of the external power supply. I got it bypassed & power it with the USB3 power.
If a “12V Power supply” is used, there is chance of damage. I only suggest 8VDC for external power.
Well, since I screwed that up, I bought a basket case SDR-USB & repaired a trace & the matching networks.
Both are is projects I am doing, slowly :
One as a ham radio with 1.5KW 1MHz to 144 MHz & 500W 200-700 MHz. All this and more is getting stuffed into a G5 MAC case.
The other is a 10" screen forklift computer with a Yaseu FT-857 PA board & filters.
I have abused the hell out of both limes & the only failure was too much voltage.
Request a fully tested unit.
I need a spare to just play with…



have 2 units LimeSDR USB
first purchased in campaign, second-like second hand, for fair price.
one Lime Net micro to start play with…

At the market at the moment no one can find product with
better price/performance ratio.

Lime campaigns are not always with good price/performance
like the one with LimeRFE, but that must be the exception from
regular very positive status :wink:


PS so far all is working 100% as expected, on my boards


@AA7QQ thanks for the info - do you have a project page for your builds? I would love to follow them


@9a4db thanks for taking the time to respond. The LimeRFE is a really interesting project but…


I have been working 6 10-12 hour days for a couple months & now, they are on hold. And, as things have come my way, the plans have evolved. Retiring in November down to Florida. I will resume building then.
As for the RFE board, it sounds great. I just happen to have a bunch of stuff that I collect from ham swaps & other sources that replace the RFE & then some.
Mobile unit is in a Honeywell VX9 forklift computer that I gutted. Stuffing the LineSDR USB, Udoo X86 Ultra & the Yaseu FT-857D RF board (PA/LPFs/BPFs). There will be several SMA coaxial relays & all Lime ports will be accessable externally, too. I will have a small 4 port USB hub & a couple of RTL dongles, too.
The home unit is still all in my head, but I have all the junk to build it.


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I have purchased two lime sdr mini, but at the end of day I found no use of them.
Can anyone suggest what I can do with them?



Sell them on EBay - there’s no shortage of buyers for the Lime…

73 de Marty, KN0CK


I couldn’t help myself on this one…So sit back, relax and enjoy…

First off, I’ve been with this project for over three years now - - from the VERY beginning. Steadfast, loyal, supporting the Lime from the VERY beginning when I was contacted by the (then) VP of IoT at Ubuntu, Maarten Ectors, about blogging on the LimeSDR - and I did so with the first betas they shipped me. It’s been a wild ride, but I continue - still with strong commitment - to support the LimeSDR and it’s variants.

I would certainly buy a LimeSDR again - without hesitation.

While the application development for Amateur Radio use has been fairly dismal (we’re on year 2 now of SDRConsole transmitting and receiving on HF, SDRAngel is giving up and folding its tent now, and SDR# is hit and miss) I still think that the LimeSDR affords anyone the opportunity to use it, with decent dynamic range - better than the HackRF, over the widest bandwidth available and most affordable cost. When I see all the side development that users have posted over the past three years, it’s gratifying that this remarkable SDR hs been used for so many different applications - some even used for radio astronomy.

My biggest gripe with the LimeSDR is that the gateware keeps changing and it keeps breaking the applications that are out there to support it. It’s as if the things that would perform the most fundamental functions of tuning, bandwidth, and such keep getting shoved around in the register mapping and soon, apps end up broken with the application developers scrambling to fix them or completely giving up altogether. It hurts the Lime to have this kind of firmware strategy. Certainly functionality will be added to give the Lime even more features than originally thought, but it always comes with a gateware change and then things breaking what works - - that really has to be replanned to put the base functionality in ONE PLACE that you won’t change and then just add things to the top of the stack. Maybe that’s the way it is, but one would ask: “…Why is the app broken now…”. So, come on…Let’s get with the program and fix this. GQRX is totally broken and Alex has moved on…The Lime needs to be stable to keep the audience…Okay? (STRONG HINT).

Would I buy again - I’m going to reiterate it - - HELL YES…! But let’s make better decisions about features and additions and keep the functions we know are never going to change in ONE PLACE TO BE UNTOUCHED SO THE APPS ARE UNAFFECTED.

Off soapbox, and planning to be with the Lime until I croak… :slight_smile:

73 de Marty, KN0CK

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One thing to note Marty…
Mainstream for Lime is femtocell, G4, G5 and similar public
networking market. All in effort to attract more chip level users.
HAM and general communication is only sort of spin off, secondary
market for us old dinosaurs :wink:
I am still able to live with that…


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Can you clarify?


@andrewback - Andrew,

Awhile back (early June) on the Groups.io forum for SDRAngel Edouard mentioned that he’s getting tired of maintaining ‘Angel’ for Windows and was looking for a new development project - he didn’t elaborate but I’m sure he’s looking forward to some other newer approach to the same work (SDR). The Github repository continues to be kept up with maintenance releases for both Linux and Windows and he recently added another radio - KiwiSDR (and it looked like it may have re-energized him some). But I got the sense that he was tired of adding features to 'Angel that break the code and that some other architecture was on the horizon that he’s thinking of or working on - but there are no details.

73 de Marty, KN0CK