This is Quartz Crystal Ladder Filters
Technical characteristics of filters:
- crystals 8,867238 MHz
- the Squareness ratio in levels 6 and 60 dB – 1.5 – 1,7;
- attenuation over a bandwidth of more than 80 dB;
- flatness in the passband is 1.5 - 2 dB;
- the bandwidth at a level 6 dB – 2.4 ± 0,15 KHz;
- input and output resistance of 202±10 Ohms.
We offer 2 options:
1. KIT DiY for assembly
The package include: 2 PCB + 12 crystals for 8x crystal quartz filter (size 75х19 mm) and 4x-crystal variable filter (34x19mm), 2 crystals for SSB & CW, varactors, capacitors,
2. Assembled units
The package include: Assembled boards + 2 crystals for BFO and CW + 3 varacaps for make 4x filter as variable for control the Width 0.7-2.4 MHZ