2320 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
2320 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
-5
-10
-15
-20
-25
-30
-35
Return Loss - septum feed 13cm TX
M1: -24,29 dB @ 2302,30 MHz M2: -28,64 dB @ 2320,90 MHz M3: -24,73 dB @ 2423,30 MHz
Limit : -19,91
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
-40
M1 M2
M3
2000 2050 2100 2150 2200 2250 2300 2350 2400 2450 2500 2550 2600
Frequency (2000,0 - 2600,0 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 –40 dB in middle 13cm band. On all using QRG is
SWR min.-25 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