Topband: Rx splinter

[John Kaufmann]

The BCC splitter design suggested by PC2A is based on the "magic tee" splitter.  An excellent tutorial on magic tee splitters can be found on W8JI's Web site:    https://www.w8ji.com/combiner_and_splitters.htm.  These splitters are very easy and inexpensive to build.  

A 1:2 splitter design using a single ferrite core can be found here:  http://michaelgellis.tripod.com/magict.html.  See Figure 7.  There is -3 dB throughput from the source to each load port.  This splitter introduces a 180 degree phase shift between the two output ports but this is irrelevant for splitting a receive antenna between two receivers.  I have built many of these using Fair-Rite 2873000202 cores.  For a 50 ohm system, change the 37.5 ohm resistance to 25 ohms.  Use 7 turns (28 AWG magnet wire is suggested) through the binocular core on the source side and 10 turns center-tapped on the load side.  This will provide a 50-ohm input impedance on all ports and excellent isolation (>25 dB) between the two load ports.

73, John W1FV


-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Peter
Sent: Friday, February 1, 2019 4:29 PM
To: topband at contesting.com
Subject: Re: Topband: Rx splinter

Hi

May I throw up the BCC splitter?
http://www.bavarian-contest-club.de/projects/misc_projects/splitter.pdf

Peter
PC2A

9 circle RX array PCB's
https://www.pi4cc.nl/tech-info/rx-array/