My hint is to use low level ( by attenuator or series resistor from Tinysa) to get the correct frequency response,calibrating receiver's IF section most? have agc control.
The filter's output impedance is higher than 50 ohm so a matching resistor or transformer should be used.
You may use tinysa as BFO for ssb also , it's stable and rather clean .
The LO at 443,9 MHz and ERA amplifier are on Ebay and the diode mixer isn't critical.
Sandro
