6 meter 300 W Low Loss Bandpass Filter BPF
50 MHz Band-pass Filter BPF uses high Q coils and capacitors with Q more than 4000. Low loss of the filter is achieved with careful design and adjustment.
Intended to be used with linear amplifiers up to 300 W output.
Although this filter is intended to be used as a transmitting filter, its design also allows is to be used as a receiving filter. It can be used before Wide Band LNA with PGA-103+ to protect sensitive device from strong out-of-band signals.
Low Insertion loss filter is excellent to be placed before any LNA to protect the receiver from HF transmitters in DX expeditions or in multi-multi environment. This BPF will suppress any harmonic on 100 MHz, 150 MHz and more, and it will protect it from HF stations.
This Band-Pass filters is good for receiving as well for transmitting, works very well both ways.
External appearance of the filter:
The recorded data on the assembled filter with HP8753ES full 2-port calibrated are presented below.
Measured Return Loss (S11) and Insertion Loss (S21). Characteristics of 50 MHz Bandpass filter for up to 300 W transmitter.
|Achieved results on build Band-pass Filter (Attenuation)
Bandwidth: 50 – 51 MHz
144 MHz / 432 MHz Band Attenuation
Feel free to send e-mail if you need something more specific.
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