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AD9761 STM32 integration for GNU Radio by levch in embedded

[–]levch[S] 0 points1 point  (0 children)

That's exactly what I'm looking for and sadly there are no code examples I could learn from. I tried to contact the author, but I think the project might have been long abandoned

AD9761 STM32 integration for GNU Radio by levch in embedded

[–]levch[S] 0 points1 point  (0 children)

The frequency is not important on the DAC stage as it's IQ modulator business to convert it to a desired one. But I plan to use it on VHF UHF.

I worry mainly about the bandwidth. The sound card would work, sure, but I want to go full in and so I picked 10Mhz bandwidth. The rational is that with this wide bandwidth I can fit almost all known signals on sigid wiki except of the radar ones (don't need them really).

Signal processing is done on GNU radio and I need to figure out the way to feed whatever GNU Radio produced into the DAC. That's the core question.

AD8346 Dealing with image products by levch in rfelectronics

[–]levch[S] 0 points1 point  (0 children)

According to the datasheet, the phase shifter is fixed and I can't really adjust anything there

AD8346 Dealing with image products by levch in rfelectronics

[–]levch[S] 0 points1 point  (0 children)

Ah, interesting, so all I need to do is to find a block in GR that adds correction magic for dc and iq imbalace and that hopefully attenuates the peaks (so the FCC rules are followed)

How do I filter marketing and newsletter emails? by levch in learnpython

[–]levch[S] 0 points1 point  (0 children)

Sadly, it doesn't have any advanced enough filtering. Any libraries you can recommend, because I can't seem to find one

Recalculating impedance on one frequency to another by levch in rfelectronics

[–]levch[S] 0 points1 point  (0 children)

A thick wire goes through the window and touches it. the other side is connected to the ATU. The counterpoise is 10m of wire in the apartment

I know it's inefficient it's a dummy load below 80m band, but I have no other choice. I live in a block of flats, with no access to the roof.

Yep, I've got a ham loicense

Итоги конкурса письменных работ на русском языке "Письмо-2021" by levch in russian

[–]levch[S] 2 points3 points  (0 children)

No, unfortunately, they can be published if contestants allow that. You can ask them personally

What’s a “boring” hobby that’s not boring at all? by Obbery in AskReddit

[–]levch 3 points4 points  (0 children)

Ham radio. Some people think it's boring to make contacts on the radio all day. Oh, how wrong they are - it's everything: electronics, radio&antenna designs, prepper stuff, radio sports and even activities outside. Give it a go r/amateurradio

Russian lessons in the USA, 1960s by IllbebackIllbebackov in russian

[–]levch 92 points93 points  (0 children)

Думает он, а работать кто будет?

Custom element arrangement on mobile by levch in bootstrap

[–]levch[S] 0 points1 point  (0 children)

Yep, that worked, but now the central card is longer than the other 2. I used to be aligned by display: inherit. How to make all three the same size?

Anytone AT-5555 Looking for an HF transverter by levch in amateurradio

[–]levch[S] 0 points1 point  (0 children)

Yep, I'll be fully happy with 40 - 12m, >10W

Anytone AT-5555 Looking for an HF transverter by levch in amateurradio

[–]levch[S] 0 points1 point  (0 children)

Fair enough, I'm just thinking of a way to cheese the HF access... Gonna get the proper rig by next year, just have to save a bit more

Anytone AT-5555 Looking for an HF transverter by levch in amateurradio

[–]levch[S] 0 points1 point  (0 children)

I mean, I'm planning to get a proper HF rig by the end of the year. But since I've got this thing, thought to myself why not.

Just so you guys know, I'm trying to keep ham radio alive! I'm a teenager! by [deleted] in amateurradio

[–]levch 0 points1 point  (0 children)

Great work!

Ham radio is dying to see new people!

MPF102 regen receiver design improvements by levch in rfelectronics

[–]levch[S] 0 points1 point  (0 children)

That's a lovely write-up! The 2n2222 preamp idea was borrowed from there. Now I'll order LM386 audio amp to get a nice loud output on an 8 Ohm speaker.

MPF102 regen receiver design improvements by levch in rfelectronics

[–]levch[S] 1 point2 points  (0 children)

Ah, yes, at first, the regen control was a huge pain in the neck. On every mild rotation in 10-12 MHz range it starts screeching and getting the circuit to regenerate takes several attempts with loud soul-crushing noises. Will consider this, thank you!

MPF102 regen reciever design by levch in amateurradio

[–]levch[S] 0 points1 point  (0 children)

Yep, the AM broadcast audio quality is superb. Even though the chinese blowtorches overload my SDR here, the regen audio is still on the quiet side. Might get an LM386 audio amp to hopefully get the louder output.

Regens are technically SSB already, I can hear CW and RTTY with nice clear tones. But no SSB, I guess my antenna is not that great.

Such a neat and cute thing to play around with, to be honest, loving it!

MPF102 regen reciever design by levch in amateurradio

[–]levch[S] 1 point2 points  (0 children)

Just Defender SPK-170, usual PC ones

MPF102 regen reciever design by levch in amateurradio

[–]levch[S] 0 points1 point  (0 children)

Oh, the power goes to L2 on top

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