V4 R828D RTL2832U 1PPM TCXO SMA Software Defined Radio (Dongle Only)

ラズパイ５に使用し 普通に使えます

以前に使用していた、SDRドングルより、安定した、受信が出来ています。 特に、耳で聞き取れない微弱な、信号でも、FT-8が受信出来るのが、素晴らしいです。 評判通りの商品で、満足しています。

価格の割に高性能です。v3より感度が良いと感じます。PCで動作に問題があった時は、給電も疑ってみて下さい。USBハブ等は通さずにPCと直接接続して下さい。

周波数特性は良いが最高ではない

素晴らしい製品、Android携帯に接続して使っています。発熱がすごい。

ありがとうございました

Been great using this to listen on the HF bands using SDR Sharp. Also cool to be able to use it to track aircraft with ADS-B.

受信ソフトにSDR#を使ってみました 気象衛星や航空無線 中波放送に短波 FM 問題なく受信できました

Thank u for Seller services

Funcionou perfeitamente

Funciona muy bien aunque si es muy necesaria una buena antena al exterior,

Working great so far although its not exactly "plug and play" (which I expected) .. I'm using a Pi3 with the PI-SDR image. Works great with SDR++ on the image. The one issue I'm having is not being able to pickup AM broadcast bands. I suspect thats antenna related but not sure yet. This has been fun to play around with. Not allot going in my area with uv- vf so cant comment on that yet. I have a MLA-30+ antenna coming soon. Will update here more after that. I can say its definitely an improvement over ver 3 just because of the increased coverage. Looking forward to installing on a android tablet . Update - works great. Overall .. these are cludgy to use compared to a dedicated radio, but fun and allow you to learn and experiment with several spectrums of RF. I was finally able to get AM but ended up installing and using on a Win11 machine. You will probably want to set up multiple antennas to use with one of these. The MLA 30+ works great on HF and lower bands but truly doesnt perform well at all above 30 MHz (expected). For that I'm going to try a simple setup with a DPDT switch and use a long wire (by long I mean about 15 feet strung along the floor). The ability to go lower in the bands makes this a worthwhile purchase. I never went the route of the upconverter before because of the added cost and hassle . Plenty to experiment with and learn. Now that I feel like I have the antenna situation addressed and have a baseline I can start tweaking the software and bookmarking stations. Nice to have good sounding stereo FM radio available on my PC setup as well. I still have a couple things I want to try - like going portable in the camper, completing a comparison of SD# and SD++, things like that. This thing will keep me busy for a while.

Maybe nice for some other frequencies, but doesn't want to pick up anything around 868mhz, so avoid if you're using it for FLARM etc.