[Premium-Rx] HF 350 filters

[Carcia, Frank A. HS]

	Hi All,
	I just got my hands on a couple 40.455 MHz 6.4 KHz. wide crystal
filters used in the
	Harris HF350. I wonder if anyone has a schematic of the first IF
showing the filter
	circuit. I would be interested in the input and output interface and
operating Z.
	I swept them at 50 ohms and they look good but a bit wider than 6.4
and wonder
	what they used in the interface circuit. They are a bit smaller than
the Racal filters
	so I hope to stuff them in my hot rod unit. I estimate 107 dB
dynamic range at 20
	KHz. spacing so a good filter. 			Seasons Greetings,
							fc