>The blue sticker has what appears to be 152 or 153 on >it, but that could just be the three left cavities. >Also, it only shows PASS and REJECT freqs; a real >duplexer would have high-pass and low-pass freqs >listed.
Yes, these cans may have been sold the first time on 152 or 153, that doesn't mean it won't do 145. My commercial duplexer on my VHF repeater was originally ordered and used in the 152 commercial stuff, the sticker says so, but it still tunes and works fine at 147. A real duplexer would have high pass and low pass frequencies listed? What if it were a notch only duplexer? A 'real' duplexer is under no such requirements. 73 N7HQR

