21 March 2010
I have a new "sort of" kit. Last year, I designed a 3-dB
hybrid coupler, the Z10050A, to be used to split a signal into two paths (to
connect two receivers to one antenna, for example) or to combine two signals
into one (two signal generators combined for intermodulation testing, most
commonly). The Z10050A consisted of a small printed circuit board, parts, three
BNC connectors and a 2"x2"x1" case.
I decided not to make the Z10050A a full kit because it's
too labor intensive for me, particularly if bought assembled.
There's still interest in an inexpensive 3-dB hybrid
coupler, and I've recently sold a few "parts only" kits. These include all the
electronic parts needed to make the coupler. The builder is responsible for an
enclosure and three connectors of choice.
The kit does not include a printed circuit board because
it's simple enough not to need one and in fact the coupler has a bit better
port-to-port isolation when built with the parts hanging in air.
I've written an 8-page "Notes on Building the Z10050A"
manual for the parts kit, with illustrations on how to build a coupler with the
parts, as well as measurements on a sample coupler. Click
here to read the
manual. The Z10050A is quite a decent performer, as good as a similar
Mini-Circuits coupler in my measurements.
The Z10050A parts kit is $5.00 for one, $9.00 for
two. This price includes postage within the USA. DX prices are $6.00 for one,
$10.00 for two, which includes first class (air) postage.
There's a separate page for the Z10050A at
Z10050A 3 dB Hybrid