I am willing to use several hybrids to cover the band, if I must. But
it would be helpful to use broadband hybrids so I don't need to use so
many. I appreciate the reference to the QST article on hybrid
construction. I will build one to see how much bandwidth I can get.
Would like to find a construction technique which yields wider
bandwidth tho. The PSCQ-2-32 from Mini-Circuits has a 3.2 to 32 MHz
bandwidth! Wonder how they do it.

The LO technique is not applicable for my design but it is interesting.
I will have to give it some thought to understand how it works.

Vinton

"Radra" wrote in message
oups.com...
I am willing to use several hybrids to cover the band, if I must. But
it would be helpful to use broadband hybrids so I don't need to use so
many. I appreciate the reference to the QST article on hybrid
construction. I will build one to see how much bandwidth I can get.
Would like to find a construction technique which yields wider
bandwidth tho. The PSCQ-2-32 from Mini-Circuits has a 3.2 to 32 MHz
bandwidth! Wonder how they do it.

The LO technique is not applicable for my design but it is interesting.
I will have to give it some thought to understand how it works.

Vinton

Well, for that requirement, you need :

G.W. Horn, I4MK, "How to design Wide-Band RF Quadrature Network"
QEX, November 1982, pp5-9.
3-30 MHz quadrature networks designed by VE5FP/VK2BOX

Rick Campbell, KK7B has "SPRAT Technical cartoons #1 and #2" that have
details on single band hybrids, and the component values for them.

W4ZCB

Radra, unable to contact you off group.

GM. I realize my reference is getting pretty old and may be difficult to
obtain. If you'd like a .PDF of I4MK's 3-30 MHz quadrature 1982 article, I
could send it to you, although it's a fairly large file. Conversely, he's
still up and about and seems to be good in the QRZ call book.

His article yields the equations for a hybrid for any frequency and should
(I think) give you a single solution for your needs.

Regards
W4ZCB

Harold E. Johnson wrote:
GM. I realize my reference is getting pretty old and may be difficult to
obtain. If you'd like a .PDF of I4MK's 3-30 MHz quadrature 1982 article, I
could send it to you, although it's a fairly large file.

Me too! Maybe you could put it on the web, in case there's more lurker
interest?

--
All relevant people are pertinent.
All rude people are impertinent.
Therefore, no rude people are relevant.
-- Solomon W. Golomb

I am attempting to contact the author of that paper, G. W. Horn (I4MK),
to see if he will permit me to publish his paper on the web for a few
months. If I am successful, I will post the web link on this list.

I have another paper which may be of interest: "A Broadband Quadrature
Coupler", Microwave Journal, May 1983, pp. 216-219. The authors employ
a pair of four-port directional couplers and a balun. Now all I have
to do is figure out how to construct a four-port directional coupler
for the 0.5-2.0 MHz band!

Vinton