Thank you for your answers! The video shows indeed the difference between the Airspy Mini & the HF+ / Discovery in FM. Many thanks for this video Leif! Thanks also Prog 'for this interesting informati

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If all of the above terminate standard ATV and transition to the system the FCC forced onto the USA, all is not lost. With our DTV signal, there is an unmodulated carrier nominally 310 kHz up from the

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You should pay attention to the testing conditions to get the correct interpretation. We are talking about differences within the component variability here because the exact same circuitry and proces

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Hi Leif, That's interesting. I thought the Discovery was superior to the Dual Port in this respect.

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Hello Brieuc, Have a look at this video: https://www.youtube.com/watch?v=Dq2C7Rzsams Best is Airspy HF+ Dual Port. The HF+ Discovery comes close but it has some reciprocal mixing problems as you can s

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Yes, I have very regulary ATV signals from Algeria via tropo, and sometimes Morocco during good openings. I can receive everyday some low video carriers from Algeria, with an periodic antenna and with

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A quick suggestion: you may still have analog TV transmissions from countries nearby (Tunisia, Libya, Algeria) that you can use to check your setup and as indicator of tropo openings. Lookup for a lis

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Thank you for your answer! The bandwidth isn't a problem for me, My Airspy is always set to 300 kHz bandwidth,660 kHz is indeed sufficient. I need a larger bandwidth for ATV and DAB receptions, but an

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The Airspy HF+ Discovery has the best performance; a strong combination of low nose and high dynamic range. If you want to LISTEN to stations it's your best choice. The one shortcoming of the HF+ Disc

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Hello everyone! I'm a FM DXer, and I have acquired an Airspy Mini 6 months ago. It was used with an omnidirectional circular FM antenna but recently, I've bought an Korner 9.2, who is actually install

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Type-N is not much better than BNC. If the shell is pulled off a type N or BNC male you can "accidentally" plug BNC into N or N into BNC. If you want precision you want something like APC-7 or SMA. {o

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/snip/ I do have Well, you do agree that BNC attenuators are only really useful at HF. Good. I am concerned about a blanket recommendation of BNC attenuators among those who are not experienced in the

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the Windsor Star article reminds me of this story: https://hackaday.com/2019/05/15/the-great-ohio-key-fob-mystery-or-honey-i-jammed-the-neighborhood/ - 1g (base 57) -

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Um, tell that to HP. BNC barrel attenuators are good probably to 20 dB. I have lower attenuation units - 3 dB and 6 dB sort of things. (At HF I like to use them because they provide a nice leakage pat

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Hi, Joanne-- Surely you of all people know that BNC attenuators are not very good attenuators at any VHF or higher frequency. Fine for HF, unless you need a lot of attenuation. --doug, WA2SAY

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My recent splurge was an 8664A synthesizer. A well calibrated 0dB to 40 dB would get me down easily as far as I need to go. (It would nominally make -180 dBm.) But, they'd have to be good attenuators.

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Most of the newer professional signal generators bottom out at -130 dBm. The 608s were microphonic as the dickens and drifted like crazy. They were the best we had at the time. I use good (HP) attenua

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We are operating n a high RF environment with a 'tower from hell' cell installation. Ask why there? We desire the installation including the optical side (18 and 24" optics) available to the students

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Si. Of course, if I did not mind a lot of up front attenuation a waveguide beyond cutoff attenuator as in the venerable HP-608 series would be REALLY interesting. They work surprisingly well. (I still

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"Really small" air-gaps are *always* capacitors, right? 73, Dana K6JQ

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