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Frequency counter
Direct conversion
80m_40m transceiver

SSB_CW Audio Filter

4 channels VFO

2W- FM transmitter


​40m_20m transceiver

​4 channels BPF

1 channels VFO

2 channels VFO

​1 channels BPF

​2 channels BPF


JJJ electronics - 4 channels Band Pass Filter,  BPF-240

JJJelectronics- 4 channels Band Pass Filter (BPF) Kit
* High quality PCB
*2 tuned circuits, give narrow band filter for amateur bands

* Frequency: for kit1
    Band 1:  3.4MHz-4.0MHz.
    Band 2:  6.8MHz – 7.3MHz
    Band 3:  13.7MHz-14.7MHz.
    Band 4:  20.8MHz – 21.8MHz

    frequency for kit2
    Band 1:  13.7MHz-14.7MHz.
    Band 2:  17.8MHz – 18.7MHz
    Band 3:  20.8MHz-21.8MHz.
    Band 4:  27.7MHz – 30.4MHz

*4 way switch to select your band
  please check the video below
Circuit diagram
Silk screen
Build instructions
Build instructions 20m/17m/15m/10m
Buy Now
kit1 Price is 13.99 with free delivery to UK 

kit1 Price is 15.69 with free delivery to Europe 

kit2 Price is 13.99 with free delivery to UK

kit2 price is 15.69 with free delivery to Europe 
Buy Now
Buy Now
Buy Now