[amsat-bb] Re: Diplexer

[Nigel Gunn G8IFF/W8IFF]

Either term is equally correct.
The prefixes di and du both indicate TWO, so it multiplexes two signals. A triplexer multiplexes three.



On 09-Apr-11 13:36, Gordon JC Pearce wrote:
> 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
> duplexers)
>
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-- 
Nigel A. Gunn,  1865 El Camino Drive, Xenia, OH 45385-1115, USA.  tel +1 937 825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN),  e-mail nigel at ngunn.net       www  http://www.ngunn.net
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