[amsat-bb] Re: Diplexer

Gordon JC Pearce gordonjcp at gjcp.net
Sat Apr 9 06:36:57 PDT 2011

On Sat, 2011-04-09 at 12:22 +1000, Andrew Rich wrote:
> Duplexor = tx rx more than one freq
> Diplexor = rx only more than one freq

Not quite; a duplexer is typically used where you want to TX and RX
simultaneously on quite close frequencies like in a repeater, and a
diplexer is more commonly used where you want to TX *or* RX on two
different bands.

So for combining a VHF and UHF aerial into a dual-band receiver, you'd
use a diplexer.  For separating the TX and RX frequencies at a repeater,
you'd use a duplexer.

Gordon MM0YEQ (who is getting sick of having to tune 456MHz/461MHz

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