1296 MHz - Ok1dfc.com

Hello Dear Ham radio EME Friend,
Thanks very much for interest and using of septum feed
for ham radio circular polarization traffic.
The feed is pre tuned. See in diagram. Pre-tuning was
done in free space and after installation feed inside dish
must be tuned again minimum SWR depend your dish.
For tuning you will use screws on opposite side feed.
Where is TX and RX please see below.
If you have any further question send me please your e-
mail.
I wish all the best and many nice QSOs with the feed.
Instruction manual
Septum feed
1296 MHz
Best regards Zdenek OK1DFC
No commercial product!
HAM RADIO ONLY!
SAMEK Zdeněk – OK1DFC
www.qsl.net/ok1dfc - ok1dfc@tesmail.cz
Libeň 156
25241 LIBEŇ – Dolní Břežany
CZECH REPUBLIC
© OK1DFC 10.February 2003

dB
0
-5
-10
-15
Return Loss - septum feed 23cm TX
OK1DFC
M1: -25,68 dB @ 1310,10 MHz
Picture how is looking
assembling with isolation
relay and preamplifier.
This preamplifier is DFC
microwave cavity system
with 0,4dB N/F. 3.th place
in preamplifiers contest
trough EME 2002
conference Praha
-20
Limit : -19,91
-25
M1
1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
Frequency (1000,0 - 2000,0 MHz)
This picture show, how is possible
install feed in the dish
Resolution: 130 CAL: ON(COAX) CW: ON
Date:
Time:
Model: S331A Serial #: 00906052
Minimum SWR in free space is –26 dB. In the dish is possible setup –36 - -40 dB
without problem. You can see the diagram how is looking feed inside dish on my
web.
DISH
RX
RX
TX