YCCC 6 Band Receive Bandpass filter
K1NQ
4.8(2)
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Technical guide for a 6 band receive only filter with relay isolation and transmit protection.
Description
This is a 6 band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. This is a 6-band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands.
Stop band reject may be limited by the relay isolation. Worse case isolation is at 28 MHz or 35 dB or better.
Relay K3/K8 protects the filter during transmit via the PTT line. A 25-50ms delay must be used between transmit and PTT.
Do not rely on your radio to provide adequate delay with out using the PTT. You logging software must be set to allow a delay
between PTT and time of 1st transmit. This filter will not work with VOX or QSK keying as you will damage the filter.
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