[Motorola] TU255 Cavity

[w4tas at gte.net]

looks like a tunable bandpass filter for UHF. It is not a duplexer cavity. The "Q" and thru put loss can be easily measured. Cable lengths are not critical in a bandpass filter application. It would be used ahead of a receiver to eliminate out of band signals. Stated range is 400 to 470 MHz which covers the 70 cm ham band.
Tony


-----Original Message-----
From: Jack Antonio <scr287 at att.net>
To: motorola at mailman.qth.net
Sent: Wed, Apr 28, 2021 12:48 pm
Subject: [Motorola] TU255 Cavity

Anyone have any documentation on these cavities
and/or their use in duplexers? Info such as cable
lengths, insertion loss, etc.

Thanks in advance

Jack Antonio
WA7DIA
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