Magic Band 6m 50-54MHz 1500W Band Pass Filter

Excellent wideband 6m 50-54MHz 1500W Band Pass Filter intended to be used with 8877, GS35, GS31, 2 x GI7B linear amplifiers, and with other tubes or transistors. 6m Band-Pass filter will easily handle any 1500W linear amplifier.

The filter uses high Q coils and capacitors with Q of more than 4000. Low loss of filter is achieved with careful design and adjustment.

Although the intention of this filter is to be used as a transmitting filter, the design allows it also to be used as receiving filter before wideband LNA with PGA-103+ to protect sensitive devices from strong out-of-band signals.

This BPF will suppress any harmonic on 100 MHz, 150 MHz, and more.

 

6m 50-54MHz 1500W Band Pass Filter

 

Results of the assembled filter measured with HP8753ES network analyzer full 2-port calibrated.

Insertion Loss:

1.8 MHz< -79 dB
3.8 MHz = -60 dB
7.1 MHz = -43 dB
14 MHz = -18 dB
50 MHz = -0.08 dB
51 MHz = -0.085 dB
52 MHz = -0.09 dB
53 MHz = -0.09 dB
54 MHz = -0.09 dB
88 MHz = -27 dB
100 MHz = -51 dB
102.7 MHz = -83 dB
108 MHz = -50 dB
144 MHz = -46 dB
150 MHz = -45 dB
162 MHz = -47 dB
200 MHz = -49 dB
430 MHz = -58 dB
432 MHz = -55 dB
440 MHz = -41 dB

Maximum power input at SWR:
1:1 = 1500W, 1:1.5 = 1200W, 1:2 = 1000W, 1:3 = 800W

 

Return Loss and Insertion Loss of 6m 50-54MHz 1500W Band Pass Filter

Zoomed data of 6m 50-54MHz 1500W Band Pass Filter

 

Deep notch for FM frequencies between 100 MHz and 108 MHz.
More than 50 dB of attenuation (2nd harmonic).

 

Wide look. Excellent attenuation of 3rd harmonic, as well as 144 MHz and 432 MHz bands

 

All band-pass filters are here: HF, VHF and UHF Band-Pass Filters

6 Meter Band-Pass Filters