Audio Polyphase Quadrature Phase Shift Network

[9H1FQ]

Hi all,
We have lots of resources and circuit ideas about the polyphase quadrature audio phase shift network, like HA5WH, Weaver, Gingell Tayloe etc.

But which is the ideal ?
Which is the one that gives the best sideband rejection ?
Which is the most used ?
Like to hear from anyone who has built one

[KL7AJ]

Hi all,
We have lots of resources and circuit ideas about the polyphase quadrature audio phase shift network, like HA5WH, Weaver, Gingell Tayloe etc.

But which is the ideal ?
Which is the one that gives the best sideband rejection ?
Which is the most used ?
Like to hear from anyone who has built one

The Polyphase network is very effective, but it's a LOT of work to put together! The advantage of it is that you don't need high-precision components like the B&W 2Q4....you just need a LOT of them. HI!

Eric

[W3JN]

WA1SOV has a nice allpass filter on his site http://webpages.charter.net/wa1sov/technical/allpass/allpass.html