"Reg Edwards" wrote in message
...
What's a directional coupler?
What do they look like?
Don't bother answering those questions.

Why do the arguers, when caught in a tight corner, always escape to UHF
for
help from directional couplers?

There are NO directional couplers at HF.

So what is the element in my Bird Thruline then, and how does it work?

I'd dying to hear at what frequencies directional couplers suddenly begin to
"exist". A sudden change in the laws of Physics at some arbitary frequency
named by man.

(Most SWR meters I've seen use a directional coupler, by the way. Even the
cheap ones.)

I think we've got to the root of Reg's problem. Just like the last time he
raised this nonsense.

--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898

Brian Reay wrote:
"---dying to hear at what frequencies directional couplers suddenly
begin to exist."

It isn`t sudden.

They sure work at audio frequencies. In telephones, they are used to
prevent the user`s voice from overpowering the distant party`s voice in
the user`s ear. They are called hybrids.

Hybrids are also used to couple a 2-wire circuit which simultaneously
carries both directions of transmission with a 4-wire circuit consisting
of a transmit pair and a receive pair.

Best regards, Richard Harrison, KB5WZI

"Richard Harrison" wrote in message
...
Brian Reay wrote:
"---dying to hear at what frequencies directional couplers suddenly
begin to exist."

It isn`t sudden.

They sure work at audio frequencies. In telephones, they are used to
prevent the user`s voice from overpowering the distant party`s voice in
the user`s ear. They are called hybrids.

Hybrids are also used to couple a 2-wire circuit which simultaneously
carries both directions of transmission with a 4-wire circuit consisting
of a transmit pair and a receive pair.

Best regards, Richard Harrison, KB5WZI

Thank you for that Richard but I think you missed the British sense of
humour (or humor) ;-)

--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898