7 MHz (40 meter) DC Ham Radio Receiver Kit For Sale -

7 MHz (40 meter) DC Ham Radio Receiver Kit

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7 MHz (40 meter) DC Ham Radio Receiver Kit :
$32.00

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7 MHz (40 meter band) Ham Radio Receiver Kit, (Direct Conversion or DC receiver)

Use 2 JFETs VFO (Osc + buffer) NE602/NE612, LM386, TDA2030
Can receiver 7.000-7.175 MHz (Or more you can modify)
Use double tuned band pass filter.
Power requirement 12 to 15volt DC.
PCB size: 6.5cm x 13.5cm.
TDA2030 Heatsink included.

This kit need assembly and frequency counter for adjust.

Schematic :: image to enlarge.

Use the frequency counter check the output frequency of the VFO circuit.
The reading will be in the range of 7.000 - 7.200 MHz. (Main Tune)
If the reading is below that mean more inductance on T50-7 you can increase the space of T50-7 for reduce the inductance frequency will be higher.

In the red circle is main and fine tune limit capacitors if you use more capacitance It has a wide tuning range.


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