The complete high performance 472 to 479kHz ( 630m Band ) Transverter Kit makes it very easy to get onto the 630m band especially with weak signal digital modes, but being linear it will work with all modes including SSB if it is allowed in your country. Construction takes around 6 hours to fully built and test. The Transverter is designed as a transmit down, and a receive up converter, with a fixed frequency range of 472 to 479kHz, and produces up to 5 Watts of linear output when used with a suitable low power < 5 Watt Yaesu FT817 or similar 3.6MHz 80M Band Transceiver. The design incorporates a 500kHz low pass filter that is used on the receiver for broadcast band rejection, and on transmit as a low pass filter to effectively reject the second and 3rd harmonics. There is further filtering in both the RX and TX paths using a tuned 472 to 479kHz band pass filter to effectively remove remaining out of band signals. The design incorporates a RF sensing circuit for automatic switching from RX to TX mode. Most components are conventional leaded types, but a few SMD components are used as they were more readily available.
THIS KIT IS IDEAL FOR MOST CONSTRUCTORS BUT HAS A FEW SMD COMPONENTS THAT REQUIRES EXPERIENCED SOLDERING SKILLS
The Product image shows a fully constructed Kit product with optional SMA connectors. Please refer to the Options Tab for the descriptions of the various products available.
EME223-630M KIT is a basic Kit that includes the PC board, construction notes, all on board components, and a 2.1mm DC power cable. No RF connectors or enclosure is included. Requires complete construction and soldering of a few small SMD components.
|Frequency Range: ||472MHz to 479MHz ( 630m Band ) |
|Local Oscillator: ||3.2MHz ( 474kHz translates to 3.674MHz IF ) |
|Stability: ||Typically +/-1Hz ( OK for WSPR ) |
|RX Gain: ||0dB +/- 2dB |
|RX Noise Figure: ||Typically < 5dB ( BFQ19 or DXT2222A ) |
|TX IF Drive:||Up to 5 Watts +36dBm @ 3.6MHz |
|TX IF Gain:||0dB Minimum @ 3.6MHz input for +37dBm Output @ 475kHz |
|TX RF Output: ||+37dBm ( 5 Watts ) with 5 Watts +37dBm input @ 3.6MHz |
|TX Spurious Outputs: ||<50dBc Refer to the Kits webpage|
|Operating Voltage:||+10 to +15vdc @ 130mA RX Stages, <1.5A TX Stages|
|Board Size:||107mm L x 73mm W x 25mm H|
For more information see the EME223 KIT WEBPAGE
630m Band 472 to 479kHz Transverter
- Brand: Mini-Kits
- Product Code: EME223-630M
- Quantity In stock: 10