simon , look for a real interruptible UPS that is running all the time with a sine wave,,, not as cheap as one of the sbs standbys,.., i have a eaton poweredge 2300 va., ... in the next room ( the

Show us what you're seeing. Screenshots remember 😃😃😃 Sent from my iPhone

Can't you put some inline 110or 220v filters on it? Joe KD2NFC Sent from my iPhone

Allan, Thanks. My APC is horrible – tomorrow or early next week I’m going to power down the entire house and see if anything else is contributing to the noise – it’s about time I did this.

Hi Greg, Only thing you are missing is that the SDR your friend bought does not cover HF. It covers about 24ish mhz and up and actually the 0.5ppm one does that very well. Paul N2EME Sent on a Sprint

Hi Group, A friend asked if I would help him with his NooElec.com NESDR Smart dongle. V3 has installed and loaded the dongle. I can receive local BFM stations fine. But I am not able to receive any

Thanks, Rob. I understand that the problem is I/Q imbalance but isn't that a function that the application corrects? I don't see the spike when running other receiver applications with either of my

By noisy Imeant RF noise Simon. I don’t think mine has a fan at least if it does it’llbe temperature activated.. It’snot bad RF-noisewise unless the mains fails. Spire chargeabout £12

I'm also interested in a quiet UPS for radio's Vincent

Allan, Does it generate any crud? I’m not worried about fan noise etc., it’ll live in the computer room. It’s the RF that concerns me. Simon Brown, G4ELI www.sdr-radio.com

To get the notifications of this radio which really is coming soon, just subscribe to this group: https://airspy.groups.io/g/hfplus Simon Brown, G4ELI www.sdr-radio.com

I’mnot sure you’ll find such a thing Simon. For what it’sworth mine is a Powercool 1500VA currently £86.75 + vat from Spire, runs mymonitor/computer/Ethernet Switch/Broadband hub and desk

Dear Simon. A question which for you is necessarily recurrent but which for me is to ask again. I have several SDRs: ELAD FDM-S2, Airspy, LimeSDR and now a Flex1500, a great gift from an amateur

Hi, Can anyone please recommend a UPS which is RF quiet? I have a APC whose square waves generate a lot of crud. Simon Brown, G4ELI www.sdr-radio.com

Hi Barry, Yes, there is a powered hub. For us, reliability was key. Isolation is good although in our installation, all the equipment is fed from the same isolated UPS system. Mike -- 73, Mike,

What is the keyboard shortcut for mode USB, LSB FM ... In version sdr Konsole v3 ? In version 2 is m+a for am... In dsp. In Version 3_6 is not possible to allocation shortcut.

Hi James, The spike in the middle is typical for direct conversion receivers. Happens for analog and SDR digital receivers. It is the imbalance of the I and Q decoders at the sampling rate frequency;

Not sure i see the advantage though of remoting an sdr with an optical usb. A resonant dipole antenna fed with lmr 400 cable sports 90 % efficiency with very little cable loss at hf wavelenghts. Then

There is an additional advantage for optical cables as well: electrical isolation. A concern we all have is what happens if a lightning strike occurs near the ham shack. An optical cable will not

Thanks all for the feedback. Yes i know about not providing power to a device. What I suspect is that possible unwanted qrm can not be coupled trough the cable from the pc to the sdr. The price is