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Radio Transceiver, SDR QRP HF Transceiver 10kHz to 220MHz VFO Generator Superheterodyne Receiver
SELF MADE EQUIPMENT: This is a VFO(Variable Frequency Oscillator) project, which can be used for self made equipment, such as superheterodyne receiver, DCR, SDR or Ham QRP transceiverBAR GRAPH INDICATOR: Also has a bar graph indicator for signal strength(S Meter) and 20 Band presets, and can also be used as an RF or clock generator
SpecificationItem Type: SDR QRP HF TransceiverWorking Range: 10kHz to 220MHzTuning Step Size: 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1MHzIntermediate Frequency (IF) :455KHz
10KHZ TO 220MHZ WORKING RANGE: Working range is 10kHz to 220MHz, can be used with for Pro Mini. Use general 128x64 I2C for OLED for SSD1306 display and Si5351 module
2 WIRES TO CONNECT: Support I2C data transmission, only need 2 wires to connect the display or Si5351, very convenient
HIGH STABILITY AND ACCURACY: Frequency generation has high stability and accuracy, simple but very effective and
Fred T.
2025-09-01 13:54:22
This little digital vfo works great for what I am using it for. I added it to an old crystal controlled transceiver. It works much better than I expected! I removed one of the crystals and connected the vfo to the crystal socket using a short piece of small diameter coax cable with a male sma connector on one end. I soldered one end to the crystal socket and connected the other end to the output on the vfo. The center conductor goes to the crystal socket and the shield to the chassis ground. If your radio uses a third harmonic crystal synthesizer like mine does, then you will need to compensate with the right frequency on the vfo to achieve the target frequency after it is multiplied through your radio's crystal synthesizer. It would be nice if the actual frequency you are using could be displayed on the screen. I believe that this could be accomplished if the factory would provide a way to custom program the IF offset by using the buttons on the vfo.
Clay
2025-04-03 18:11:31
Hope it lasts
Fred T.
2025-02-20 13:39:04
This little digital vfo works great for what I am using it for. I added it to an old crystal controlled transceiver. It works much better than I expected! I removed one of the crystals and connected the vfo to the crystal socket using a short piece of small diameter coax cable with a male sma connector on one end. I soldered one end to the crystal socket and connected the other end to the output on the vfo. The center conductor goes to the crystal socket and the shield to the chassis ground. If your radio uses a third harmonic crystal synthesizer like mine does, then you will need to compensate with the right frequency on the vfo to achieve the target frequency after it is multiplied through your radio's crystal synthesizer. It would be nice if the actual frequency you are using could be displayed on the screen. I believe that this could be accomplished if the factory would provide a way to custom program the IF offset by using the buttons on the vfo.
Clay
2025-02-17 12:09:19
Hope it lasts
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