NooElec Ham It Up v1.2 - NooElec RF Upconverter For Software Defined Radio. Works With Most SDRs Like Funcube, RTLSDR (RTL2832U with E4000, FC0013 or R820T Tuners); MF/HF Converter With SMA Jacks

If you're into SDR radio stuff this is a must have for frequencies below 25 MHZ. It works good too

Lo compré junto con dos Nooelec SMArtSDR y poder montar un servidor websdr con Raspberry Pi bajo Raspbian. Es prácticamente necesario si se quieren recibir frecuencias en la banda HF ya que el SDR por si solo se queda sordo por debajo de los 100Mhz. El producto se ve bien acabado y hace lo que se espera, en mi caso con una antena dipolo-V echa con cable (5m aprox por hilo) recibe bastante bien multitud de frecuencias en HF. Se echa en falta una toma de 5v para no depender de la toma USB y quizás también el poder sacar unos pines para un conmutador externo del passthrough (para los que nos gusta cacharrear un poco) En definitiva buen producto, combinado con el NEDSDR y dos antenas más o menos decentes tienes al alcance un receptor capaz de recibir un buen rango de frecuencias.

20%誤差の抵抗値が実際は２０％も指針をずらしてますけど。 その理由から0.8鈴メッキ線が使えません。 ミキサーを組んでいるのですが使えるアウトプット用カップリングコンデンサを4.7uF/250VSantanにしました。抵抗誤差からくる問題ですべてを組めませんでした。日本国内からすべてを調達して最初からやり直しになります。ここまでの時間はなんだったのだか、 しかしこんな部品設計で潜水艦とかロケットミサイルとか人工衛星つくってたのでしょうね。はっきり言ってもらわせるとやめた方がいいですよ。こんなやつは国を亡ぼしますよねぇ

I am fully licensed as a radio amateur, but for just receiving 0-30MHz this is a great product. What it does is basically gives you an intermediate signal at 125MHz to pass to realtek dongle which was originally designed for TV via USB reception, but using freely available software you can make this dongle receive around 24MHz to 1700MHz, so clearly, to get frequencies below 24MHz you need to add the upconverter which can receive below 30MHz and present it to the USB dongle at 125MHz, (well away from broadcast commercial radio). With the two items together you have a software defined receiver that goes from 0-1700Mhz in all modes provided by such free software as SDR# (sdr sharp) I did have a small problem to start with, the main crystal was totally missing from my order, for reasons unknown it is not plugged into the board by the seller, but a couple of emails and a bit of waiting had the missing crystal sent to me from USA. I plugged it into the socket on board and it worked fine. It requires a USB A to B connector to power it, this is not included with the board. A neat little switch allows passthrough to allow direct access to your USB realtek dongle which is handy should you wish to use 1090MHz aircraft virtual radar software which shows real time aircraft info on windows PC, again this is free software! The main aerial connectors are SMA, which I bought adapters for because SMA is difficult to connect to coaxial cables, and am now planning on fitting all the bits into one metal box for ease of use. The future of radio really will be software defined, since this requires far less hardware and has so many possibilities that your standard radios just can't do unless you pay thousands of pounds. My whole setup has cost around £50, so for a very capable receiver and signal analyser, why would anyone do it another way? 0-1700MHz is a massive range, and for the money can't be beaten. Making all this work requires only a very basic understanding of electronics, it is more like making Lego fit together than anything, and I'm very impressed with the quality of this item. Delivery is reasonable, around a couple of weeks so all good if you are not in a rush.

Probably the best, if not one of the best app converter’s for SDR radio use in the HF frequency band. It’s a great place to start, especially if you’re radio has no app converter built into it, otherwise you won’t be able to receive those AGF or lower frequencies. (The new plus version of this particular up converter is also a great place to start as it goes even way lower in frequency.) This version, is the ‘second version’ of the NooELEC upconverter, and preferred over the old first version. You can’t get much better than this, and is built with and by Canadians AND Americans, so you know it’s of the highest build quality! (As soon as I’ve got the cash I’m liable to buy another one of these, including the new ‘plus’ version to get all those juicy low to ultra-low frequencies that are just out of reach of this particular upconverter. That being said, this unit is still an excellent way to get into shortwave listening and is a MUST if your RTL-SDR radio has none included in it’s internal circuitry. Connecting to the HF antenna without an upconverter will get you nothing, so you need this to be complete. It’s what I tell my friends who are interested in Shortwave and HF listening.