LPF HF +50MHz for HERMES Odyssey HiQSDR WSPR Raspberry Pi 20W, Low Pass Filter

Description

DESCRIPTION
This is a 7th order Chebyshev Low Pass Filter for using after HF power amplifier for removing harmonic.
This LPF intended for HF amateur bands - 1.8 MHz, 3.5 MHz, 7.0 Mhz, 10 MHz, 14 MHz, 18 MHz, 21 MHz, 24 MHz, 28 MHz and 50MHz.
3dB cut off
frequency is  2.5 MHz, 5 MHz, 8.6 MHz, 15.5 MHz, 25 MHz, 35 MHz and 55 MHz.
You can choose cut off frequency by setting up binary code with 3.3v or 5v logic levels, see pictures above.
All bands insertion loss is less than 0.5 dB.
You can see attached graths  for exact, per bands, values.
Input and output impedance is 50 Ohm.
Input and output connectors is SMA female.
LPF Return Loss is better than 35 dB  for any band
Maximum handled power for any band is 20w
сontinuously
, 40w with 30% duty
cycle is
ok too
Only high quality and original components using - AMIDON T50 cores, TAKAMISAWA relays, and NP0 Hi-Q
capacitors.
SWR and
ferrite rings
temperature should be under control
Board size is 120 x 75 mm
SHIPPING
We ship worldwide from Ukraine by Registered Air mail with tracking number. Your item will be shipped next business day once payment received. Delivery time depends on destination and Customs, usually it takes about 15-25 business days.