6m 50-51MHz 1500W Band Pass for Magic Band

Magic band 6m 50-51MHz 1500W Band Pass Filter uses high Q coils and capacitors with Q of more than 4000. Low loss of the filter is achieved with careful design and adjustment.

Intended to be used with linear amplifiers 8877, GS35, GS31, 2xGI7B, and with other tubes up to 1.5 kW output.

Although this filter is intended to be used as a transmitting filter, its design also allows it to be used as a receiving filter. It can be used before Wide Band LNA with PGA-103+ to protect sensitive devices from out-of-band signals.

A 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 environments. This BPF will suppress any harmonic on 100 MHz, 150 MHz, and more, and it will protect it from HF stations.

 

6m 50-51MHz 1500W Band Pass Filter

 

 

The measured results of the assembled filter with HP8753ES full 2-port calibrated are presented below.

 

6m 50-51MHz 1500W Band Pass Filter HF Attenuation

 

Measured characteristics of 6m 50-51MHz 1500W Band Pass Filter

Insertion loss:
1.8MHz 75dB
3.8MHz 73dB
7.05MHz 70dB
14.1MHz 53dB
21MHz 44dB
28MHz 32dB
50-51 MHz 0.11 dB, Input RL -30 dB
88MHz 39dB
98MHz 49dB
108MHz 43dB
144MHz 45dB
430MHz 69dB

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

 

These excellent results were achieved by the careful selection of components and the design of the filter. Band Pass filter will eliminate any harmonic emission from your linear amplifier.

 

Harmonic and FM attenuation of the 6m 50-51MHz 1500W Band Pass Filter

 

2m and 70cm attenuation of the 6m 50-51MHz 1500W Band Pass Filter

 

Zoomed Input RL and insertion loss 6m 50-51MHz 1500W Band Pass Filter

 

1500 W and 4000 W filters share the same high-quality components except for the connectors.

 

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

6 Meter Band-Pass Filters