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Welcome
contact
Frequency counter
Direct conversion
receiver
Components
80m_40m transceiver

SSB_CW Audio Filter

4 channels VFO

2W- FM transmitter

Mixer

​40m_20m transceiver

​4 channels BPF

S-meter
1 channels VFO

2 channels VFO

​1 channels BPF

​2 channels BPF

LPF
chassis
IRT
Download

  JJJelectronics- 1 channels Band Pass Filter (BPF)
  

  

*2 tuned circuits , give narrow band filter for amateur bands
* Frequency:

    Band 1: 1.7MHz- 2.2MHz
    Or
    Band 1:  3.5MHz-4.2MHz.
    Or
    Band 1:  7.0MHz – 7.5MHz
    Or
    Band 1:  14.0MHz-14.7MHz
   Or.
    Band 1:  21.0MHz – 21.8MHz
  
Circuit diagram
Silk screen
​Build instruction