David, You get a message when booting about lack of power to the GPU. Simon Brown, G4ELI https://www.sdr-radio.com

I wonder if you have both receivers connected to the antenna at the same time? This can cause digital noise emitted from one radio to be received by the other. Another good test is to disconnect the

{o.o} I have a couple of aerials, an 80m dipoleand a random long wire about 150 feet long. I use a matching unun with the long wire.The dipole works fine as a receiving aerial on any band and gives

They’re easy enough to come by Tom. This one belongs to the son of silent keyG3PNV and has lain dormant for the best part of 50 years. https://www.radiomuseum.co.uk/modR1155.html Sacriligiously

Max, I did. It seems the Airspy is excessively noisy. Levels appear to be high. I can not believe that a good Airspy could be that much worse. What antenna? It could be that some out of band signal

You have a really small antenna, perhaps? If not I suspect the Andrus is not setup as nicely as it could be. With a low loss antenna system below even 30 MHz and especially under 10 MHz

You lucky man Allan! I almost had one around 1970. It sat at the back of the physics lab and someone had removed all the valves. Couldn’t afford them on pocket money. Never thought of hanging on to

One other thing - if he is not using the AirSpy HF+ Discovery's AGC he's very likely running with some gain mismatches in the analog portion of the chain. {^_^} On

I suspect it is an issue with the antenna match to the receiver. One might provide better performance on any given antenna than the other. Which one does better depends on the antenna.

Max.. I’m overhauling a WW2 R1155and as I tuned across the long wave band a Polish station close to Radio 4 camein at a good S8 about mid day. I checked on my Andrus SDR with the sameaerial and it

On Thu, Dec 23, 2021 at 12:34 PM, Patrick wrote: It's indeed surprising. As a LF enthusiast (chasing NDB for more than 20 years), I can tell the Discovery is one of the most sensitive receiver I have

Just a random observation - I tend to over-provision the power supply on general principles. It will stand up to random heavy spikes in load a little better. I don't believe what

David... Most new motherboards have a second connector (12V yellow/black) which has to be plugged in for the system to boot up. Some graphics cards also have an extra power connector, also

Yes they do David, My GT1600 (Whatever Simon was recommending!) has a 4-pin connector (old school HDD type) Mine is powered directly from the PSU. Not sure if any power is supplied via the graphics

Do some graphics cards have a second power supply connection? I've seen this with satellite TV tuner cards. Just wondering what might happen if the second power lead hadn't been

A collinear made from co-ax would be a better bet for 1.09 GHz ADS-B as it has more gain. For example: https://www.balarad.net/ For aircraft scatter use an antenna appropriate to the frequency

Max et al, I have a Corsair PSU too can’t recall exact model but it’s rated at 750W. It was overkill for the first PC I built with it and the second and probably the third one too, built last

Would a similar V antenna, adjusted to the proper length, would be suitable for ADS-B or even plane scatter (air scatter) ?

Hi Max, It's indeed surprising. As a LF enthusiast (chasing NDB for more than 20 years), I can tell the Discovery is one of the most sensitive receiver I have ever used, if not the most sensitive

On Thu, Dec 23, 2021 at 12:07 PM, Allan Isaacs wrote: Bon chance Michel Allan G3PIYYes, good luck Michel. Yes, Allan, had assumed that it was likely to be caps. Quite interesting that obviously two