BPFs: 10–15–20–40–80–160LPF-160BPF

15M HP BPF comparison (websites can be opened by links):

Insertion Loss 20M Isolation 10M Isolation
VA6AM  < 0.35 dB > 60  dB > 56 dB
DXEngineering(LBS) < 0.4 dB > 58 dB > 55 dB
DXEngineering (DX-S) < 0.5 dB >44 dB > 59 dB
4O3A < 0.4 dB > 60 dB > 51 dB

Recommended Band Pass Filter (BPF) applied power with antenna VSWR <1.5:

  • 100 CFM fan installed – 3000W CW/SSB (2500W RTTY) 
  • 50 CFM fan installed – 1800W CW/SSB (1500W RTTY)
  • Without fan installed – 1500W PEP

Enclosure is Hammond 1411ZU :

  • Without Fan – 17″ x 4″ x 5″ (42.5 x 10.5 x 12.5 cm)
  •  With Fan Installed –  18″ x 4″ x 5″ (46 x 10.5 x 12.5 cm)

15M

In general, schematics is the 5th order Chebyshev inductor-coupled BPF.

  • Insertion Loss < 0.35dB
  • Band Isolation ( 20M > 60dB, 10M > 55dB)
  • VSWR <1.1 (RL >26 dB)

NR4M_15

15M band BPF with Triplexer and other BPFs connected :

  • Insertion Loss < 0.43dB
  • Band Isolation ( 20M > 90dB, 10M   >88 dB)
  • VSWR< 1.1 (RL > 26 dB)

The graph below is for 15M BPF and Triplexer together when other triplexer band ports connected to 10 and 20 meter BPFs.

15M_Triplexer_BPFs

Below is all three BPFs 10, 15 and 20 meter bands to be used with Triplexer.

K8AZ 003