Updated 17 Sept 2009
My E - mail address :
SM5LE EME QRT
The below is links from SM5LE Homepage http://web.telia.com/~u14901544/
-----------------------------------------------------------------------------------------------------------------------------------------------
My EME station , 1296 MHz :
SM5LE in JO99bd
2.2 meter mesh dish F/D=0.34 (modified SM6CKU 1.8m F/D=0.4 parabola,
but with extension to 2.2m gives F/D=0.34)
Septum feed OK1DFC. With choke ring.
250 W @ feed , CW ( 200W JT65 )
Spid RAS rotator with MoonSked software by GM4JJJ
Rig : TS-2000X (with 1296 MHz module).
LNA : NE32684A cavity NF ~0.3 dB
8 dB sun-noise
CW SSB JT65
1296 MHz only
-----------------------------------------------------------------------------------------------------------------------------------------------
|
CALL |
SCORE |
QSOS |
Phone/CW |
Digital |
TotalMults |
Band |
Operators |
|
Single Operator, Multi-Band 50-1296 Analog |
|||||||
|
OZ4MM |
1224500 |
155 |
155 |
0 |
79 |
BDE |
|
|
SV1BTR |
1048800 |
152 |
152 |
0 |
69 |
BD |
|
|
VK3UM |
510000 |
102 |
102 |
0 |
50 |
DE |
|
|
SP7DCS |
509600 |
91 |
91 |
0 |
56 |
BDE |
|
|
DL1YMK |
367500 |
75 |
75 |
0 |
49 |
DE |
|
|
JA6AHB |
347600 |
79 |
79 |
0 |
44 |
DE |
|
|
SV3AAF |
132000 |
44 |
44 |
0 |
30 |
BD |
|
|
Single Operator, Multi-Band 50-1296 Digital |
|||||||
|
EB5EEO |
475200 |
99 |
0 |
99 |
48 |
BD |
|
|
EB2FJN |
104000 |
40 |
0 |
40 |
26 |
BD |
|
|
VK4CDI |
20800 |
16 |
0 |
16 |
13 |
BD |
|
|
RZ3AED |
4900 |
7 |
0 |
7 |
7 |
BD |
|
|
Single Operator, Multi-Band 50-1296 Mixed Mode |
|||||||
|
UA4AQL |
82800 |
36 |
8 |
28 |
23 |
BD |
|
|
81000 |
30 |
3 |
27 |
27 |
AB |
|
|
|
RK3WWF |
32300 |
19 |
1 |
18 |
17 |
BDE |
|
|
UT3LL |
5600 |
8 |
3 |
5 |
7 |
DE |
|
|
2000 |
5 |
1 |
4 |
4 |
BD |
|
|
|
Single Operator, Multi-Band 2.3 GHz And Up |
|||||||
|
F2TU |
193800 |
51 |
51 |
0 |
38 |
FHI |
|
|
ES5PC |
68200 |
31 |
31 |
0 |
22 |
FH |
|
|
Single Operator, All Band Analog |
|||||||
|
RW1AW |
1513200 |
156 |
156 |
0 |
97 |
BDEFI |
|
|
G3LTF |
1424000 |
160 |
160 |
0 |
89 |
BDEFG |
|
|
DF3RU |
972400 |
143 |
143 |
0 |
68 |
DEF |
|
|
972000 |
120 |
120 |
0 |
81 |
BDEFI |
|
|
|
SM3AKW |
810700 |
121 |
121 |
0 |
67 |
BDEF |
|
|
DL4MEA |
499800 |
102 |
102 |
0 |
49 |
EF |
|
|
IW2FZR |
330000 |
75 |
75 |
0 |
44 |
EF |
|
|
F5JWF |
198000 |
55 |
55 |
0 |
36 |
EFI |
|
|
183300 |
47 |
47 |
0 |
39 |
EFGH |
|
|
|
IQ4DF |
180200 |
53 |
53 |
0 |
34 |
EI |
|
|
140800 |
44 |
44 |
0 |
32 |
EF |
|
|
|
JA4BLC |
101400 |
39 |
39 |
0 |
26 |
EF |
|
|
Single Operator, Single Band 50 MHz Digital |
|||||||
|
PE1BTX |
48600 |
27 |
0 |
27 |
18 |
A |
|
|
1600 |
4 |
0 |
4 |
4 |
A |
|
|
|
100 |
1 |
0 |
1 |
1 |
A |
|
|
|
Single Operator, Single Band 50 MHz Mixed |
|||||||
|
JR6EXN |
30400 |
19 |
1 |
18 |
16 |
A |
|
|
|
|
|
|
|
|
|
|
|
Single Operator, Single Band 144 MHz Analog |
|||||||
|
LZ2US |
284900 |
77 |
77 |
0 |
37 |
B |
|
|
F3VS |
210800 |
68 |
68 |
0 |
31 |
B |
|
|
OK1MS |
189000 |
63 |
63 |
0 |
30 |
B |
|
|
LA8YB |
132300 |
49 |
49 |
0 |
27 |
B |
|
|
UR5LX |
89100 |
33 |
33 |
0 |
27 |
B |
|
|
YO2AMU |
88800 |
37 |
37 |
0 |
24 |
B |
|
|
IK2DDR |
79800 |
38 |
38 |
0 |
21 |
B |
|
|
42500 |
25 |
25 |
0 |
17 |
B |
|
|
|
JHŘWJF |
40600 |
29 |
29 |
0 |
14 |
B |
|
|
RA3EC |
24700 |
19 |
19 |
0 |
13 |
B |
|
|
9A9B |
12600 |
14 |
14 |
0 |
9 |
B |
|
|
DL8UCC |
11000 |
11 |
11 |
0 |
10 |
B |
|
|
DG5CST |
5600 |
8 |
8 |
0 |
7 |
B |
|
|
VA3TO |
2500 |
5 |
5 |
0 |
5 |
B |
|
|
DF1VH |
900 |
3 |
3 |
0 |
3 |
B |
|
|
SP3XBO |
900 |
3 |
3 |
0 |
3 |
B |
|
|
SM1MUT |
400 |
2 |
2 |
0 |
2 |
B |
|
|
100 |
1 |
1 |
0 |
1 |
B |
|
|
|
HA8V |
100 |
1 |
1 |
0 |
1 |
B |
|
|
Single Operator, Single Band 144 MHz Digital |
|||||||
|
1245600 |
173 |
0 |
173 |
72 |
B |
|
|
|
EA3BB |
236800 |
64 |
0 |
64 |
37 |
B |
|
|
LU1CGB |
236000 |
59 |
0 |
59 |
40 |
B |
|
|
OK1UGA |
204000 |
60 |
0 |
60 |
34 |
B |
|
|
RA3GES |
153600 |
48 |
0 |
48 |
32 |
B |
|
|
HAŘHO |
105000 |
35 |
0 |
35 |
30 |
B |
|
|
OK1KKD |
96100 |
31 |
0 |
31 |
31 |
B |
|
|
EB1DNK |
77000 |
35 |
0 |
35 |
22 |
B |
|
|
52500 |
25 |
0 |
25 |
21 |
B |
|
|
|
PA3ECU |
36000 |
24 |
0 |
24 |
15 |
B |
|
|
30400 |
19 |
0 |
19 |
16 |
B |
|
|
|
28800 |
18 |
0 |
18 |
16 |
B |
|
|
|
YO3DMU |
18000 |
18 |
0 |
18 |
10 |
B |
|
|
10000 |
10 |
0 |
10 |
10 |
B |
|
|
|
SP2NJI |
7200 |
9 |
0 |
9 |
8 |
B |
|
|
4900 |
7 |
0 |
7 |
7 |
B |
|
|
|
CT1DHM |
4200 |
7 |
0 |
7 |
6 |
B |
|
|
CT1EKD |
3600 |
6 |
0 |
6 |
6 |
B |
|
|
LZ1LP |
3500 |
7 |
0 |
7 |
5 |
B |
|
|
2000 |
5 |
0 |
5 |
4 |
B |
|
|
|
RA3LW |
400 |
2 |
0 |
2 |
2 |
B |
|
|
100 |
1 |
0 |
1 |
1 |
B |
|
|
|
DJŘMY |
100 |
1 |
0 |
1 |
1 |
B |
|
|
SP6HED |
100 |
1 |
0 |
1 |
1 |
B |
|
|
EA1FBU |
100 |
1 |
0 |
1 |
1 |
B |
|
|
Single Operator, Single Band 144 MHz Mixed Mode Assisted |
|||||||
|
1339600 |
197 |
32 |
165 |
68 |
B |
|
|
|
RX1AS |
1043700 |
147 |
12 |
135 |
71 |
B |
|
|
947200 |
148 |
0 |
148 |
64 |
B |
|
|
|
7K3LGC |
754600 |
154 |
3 |
151 |
49 |
B |
|
|
726000 |
121 |
6 |
115 |
60 |
B |
|
|
|
631300 |
107 |
0 |
107 |
59 |
B |
|
|
|
608400 |
117 |
12 |
105 |
52 |
B |
|
|
|
577700 |
109 |
0 |
109 |
53 |
B |
|
|
|
SM5CUI |
530100 |
93 |
5 |
88 |
57 |
B |
|
|
400500 |
89 |
8 |
81 |
45 |
B |
|
|
|
262200 |
69 |
0 |
69 |
38 |
B |
|
|
|
DC2MW |
222000 |
60 |
0 |
60 |
37 |
B |
|
|
PY4OG |
188700 |
51 |
1 |
50 |
37 |
B |
|
|
184800 |
56 |
5 |
51 |
33 |
B |
|
|
|
148800 |
48 |
0 |
48 |
31 |
B |
|
|
|
DL2FCN |
128800 |
46 |
5 |
41 |
28 |
B |
|
|
PA3CWN |
92000 |
46 |
32 |
14 |
20 |
B |
|
|
DL2LAH |
85000 |
34 |
2 |
32 |
25 |
B |
|
|
76800 |
32 |
0 |
32 |
24 |
B |
|
|
|
I2RV |
70400 |
32 |
3 |
29 |
22 |
B |
|
|
YU7XL |
52700 |
31 |
4 |
27 |
17 |
B |
|
|
DK5WL |
49400 |
26 |
1 |
25 |
19 |
B |
|
|
JS3CTQ |
47500 |
25 |
0 |
25 |
19 |
B |
|
|
SM5CFS |
21600 |
18 |
0 |
18 |
12 |
B |
|
|
RA3WDK |
18700 |
17 |
0 |
17 |
11 |
B |
|
|
7Z1SJ |
16500 |
15 |
0 |
15 |
11 |
B |
|
|
7000 |
10 |
0 |
10 |
7 |
B |
|
|
|
JJ3JHP |
5600 |
8 |
0 |
8 |
7 |
B |
|
|
VE5UF |
5600 |
8 |
0 |
8 |
7 |
B |
|
|
EA5ADH |
2500 |
5 |
0 |
5 |
5 |
B |
|
|
400 |
2 |
0 |
2 |
2 |
B |
|
|
|
JE1NTL |
300 |
3 |
0 |
3 |
1 |
B |
|
|
EA5MT |
100 |
1 |
0 |
1 |
1 |
B |
|
|
Single Operator, Single Band 144 MHz Mixed Mode Unassisted |
|||||||
|
RU1AA |
2618700 |
301 |
60 |
241 |
87 |
B |
|
|
792000 |
132 |
14 |
118 |
60 |
B |
|
|
|
RA6DA |
534100 |
109 |
13 |
96 |
49 |
B |
|
|
EA2AGZ |
523200 |
109 |
7 |
102 |
48 |
B |
|
|
YU7AA |
514800 |
117 |
114 |
3 |
44 |
B |
|
|
IK7EZN |
415800 |
99 |
5 |
94 |
42 |
B |
|
|
I3EVK |
409200 |
93 |
28 |
65 |
44 |
B |
|
|
393600 |
82 |
6 |
76 |
48 |
B |
|
|
|
JM1GSH |
173600 |
56 |
2 |
54 |
31 |
B |
|
|
UA4NX |
45000 |
25 |
0 |
25 |
18 |
B |
|
|
RA4NAG |
600 |
3 |
1 |
2 |
2 |
B |
|
|
Single Operator, Single Band 432 MHz Analog |
|||||||
|
DL9KR |
230400 |
72 |
72 |
0 |
32 |
D |
|
|
UA3PTW |
198400 |
64 |
64 |
0 |
31 |
D |
|
|
I1NDP |
122500 |
49 |
49 |
0 |
25 |
D |
|
|
FR5DN |
92000 |
40 |
40 |
0 |
23 |
D |
|
|
JJ1NNJ |
85800 |
39 |
39 |
0 |
22 |
D |
|
|
RW3PX |
77000 |
35 |
35 |
0 |
22 |
D |
|
|
70400 |
32 |
32 |
0 |
22 |
D |
|
|
|
65100 |
31 |
31 |
0 |
21 |
D |
|
|
|
60800 |
32 |
32 |
0 |
19 |
D |
|
|
|
UT2EG |
56000 |
28 |
28 |
0 |
20 |
D |
|
|
JA9BOH |
42500 |
25 |
25 |
0 |
17 |
D |
|
|
SM3JQU |
27000 |
18 |
18 |
0 |
15 |
D |
|
|
DL7UDA |
27000 |
18 |
18 |
0 |
15 |
D |
|
|
JH4JLV |
22400 |
16 |
16 |
0 |
14 |
D |
|
|
14400 |
12 |
12 |
0 |
12 |
D |
|
|
|
YO2IS |
8000 |
10 |
10 |
0 |
8 |
D |
|
|
Single Operator, Single Band 432 MHz Digital |
|||||||
|
JHŘTOG |
100 |
1 |
0 |
1 |
1 |
D |
|
|
Single Operator, Single Band 432 MHz Mixed Mode Assisted |
|||||||
|
52800 |
24 |
11 |
13 |
22 |
D |
|
|
|
OK1TEH |
2000 |
5 |
2 |
3 |
4 |
D |
|
|
Single Operator, Single Band 1296 MHz Analog |
|||||||
|
356000 |
89 |
89 |
0 |
40 |
E |
|
|
|
OK1DFC |
334400 |
88 |
88 |
0 |
38 |
E |
|
|
LA9NEA |
281200 |
76 |
76 |
0 |
37 |
E |
|
|
155000 |
50 |
50 |
0 |
31 |
E |
|
|
|
IK3COJ |
142800 |
51 |
51 |
0 |
28 |
E |
|
|
RA3AQ |
135200 |
52 |
52 |
0 |
26 |
E |
|
|
JR4AEP |
81900 |
39 |
39 |
0 |
21 |
E |
|
|
77700 |
37 |
37 |
0 |
21 |
E |
|
|
|
SM5LE |
42500 |
25 |
25 |
0 |
17 |
E |
|
|
JH5LUZ |
39100 |
23 |
23 |
0 |
17 |
E |
|
|
JF3HUC |
38400 |
24 |
24 |
0 |
16 |
E |
|
|
EA3UM |
33300 |
37 |
37 |
0 |
9 |
E |
|
|
JH1KRC |
27000 |
18 |
18 |
0 |
15 |
E |
|
|
JA4LJB |
23800 |
17 |
17 |
0 |
14 |
E |
|
|
100 |
1 |
1 |
0 |
1 |
E |
|
|
|
Single Operator, Single Band, 1296 MHz, Mixed Mode, Assisted |
|||||||
|
G4CCH |
514800 |
117 |
97 |
20 |
44 |
E |
|
|
Single Operator, Single Band 1296 MHz Mixed Unassisted |
|||||||
|
PA3FXB |
20400 |
17 |
11 |
6 |
12 |
E |
|
|
Single Operator, Single Band 2.3 GHz |
|||||||
|
SP6GWN |
900 |
3 |
3 |
0 |
3 |
F |
|
|
Single Operator, Single Band 5.7 GHz |
|||||||
|
OK1CA |
3600 |
6 |
6 |
0 |
6 |
H |
|
|
Multi Operator, Multi-Band 50-1296 Analog |
|||||||
|
SP6JLW |
460600 |
94 |
94 |
0 |
49 |
DE |
SP6JLW, SP6OPN |
|
Multi Operator, Multi-Band 50-1296 Mixed Mode |
|||||||
|
N9JIM* |
1456000 |
182 |
92 |
90 |
80 |
BE |
|
|
428400 |
84 |
26 |
58 |
51 |
BD |
||
|
Multi Operator, Multi-Band 2.3 GHz and Up |
|||||||
|
OK1KIR |
127100 |
41 |
41 |
0 |
31 |
FHI |
OK1KIR, OK1DAI, OK1DAK, OK1VAO |
|
Multi Operator, All Band Mixed Mode |
|||||||
|
4253400 |
306 |
146 |
160 |
139 |
BDEF |
||
|
Multi Operator, Single Band 144 MHz Mixed Mode Assisted |
|||||||
|
IK1UWL |
1724800 |
224 |
20 |
204 |
77 |
B |
IK1UWL, I1ANP |
|
319800 |
82 |
0 |
82 |
39 |
B |
||
|
F5KCH |
220500 |
63 |
4 |
59 |
35 |
B |
F5KCH, F6HEO, F1UKQ, FŘEUI, F4FPK |
|
81000 |
30 |
6 |
24 |
27 |
B |
||
|
Multi Operator, Single Band 144 MHz Mixed Mode Unassisted |
|||||||
|
YO9FRJ |
881600 |
152 |
31 |
121 |
58 |
B |
YO7FRJ, YO9AFE |
|
132000 |
44 |
2 |
42 |
30 |
B |
||
|
Multi Operator, Single Band 432 MHz Mixed Mode Unassisted |
|||||||
|
OH2PO |
360400 |
106 |
70 |
36 |
34 |
D |
OH2PO, OH2HYT, OH6DD |
|
Multi Operator, Single Band 1296 MHz Analog |
|||||||
|
IZ1BPN |
207700 |
67 |
67 |
0 |
31 |
E |
IZ1BPN, IK1MTZ |
|
SM3LBN |
195300 |
63 |
63 |
0 |
31 |
E |
SM3LBN, SM3EVR |
|
SKŘUX |
186000 |
60 |
60 |
0 |
31 |
E |
SMŘMXO, SMŘDFP, SMŘEPO |
|
ON4BCB |
168200 |
58 |
58 |
0 |
29 |
E |
ON4BCB, ON4CO, ON4CCM |
|
LA2Z |
131600 |
47 |
47 |
0 |
28 |
E |
LA2PKA, LA5SKA, LA6MV, LA7VH |
|
95000 |
38 |
38 |
0 |
25 |
E |
||
|
UA3DJG |
26600 |
19 |
19 |
0 |
14 |
E |
UA3DJG, UA3ATS, RA3WND |
|
Multi Operator, Single Band 1296 MHz Mixed Mode Assisted |
|||||||
|
RD3DA |
183000 |
61 |
55 |
6 |
30 |
E |
RD3DA, RU3ACE |
|
VA7MM |
122200 |
47 |
38 |
9 |
26 |
E |
VE7CMK, VE7CNF |
|
Multi Operator, Single Band 2.3 GHz |
|||||||
|
HB9Q |
37800 |
21 |
21 |
0 |
18 |
F |
HB9CRQ, HB9DRI, HB9EHJ, HB9JAW |
|
34000 |
20 |
20 |
0 |
17 |
F |
||
-----------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------------------
PY2BS QSO
-----------------------------------------------------------------------------------------------------------------------------------------------
SM5LE echos:
Finally; I do hear my own echo’s by ear, occasionally at least … hr some mp3´s :
eko_1_OK.mp3 eko_2_OK.mp3 eko_3_OK.mp3
Super best JT echos ! Q=10 @ N=5 , @ -1.1 dB DGRD !
Echo_1 in freq. and time display , ~350 Hz
BW:
-----------------------------------------------------------------------------------------------------------------------------------------------
PI9CAM Vader Jacob 23 cm by PA3FXB.mp3
-----------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------------------
YES ! SM0FOB and SM5LE gang did it !
First 1.8m/75W/mesh-feed EME QSO was G4CCH , tnx Howard.
Later on it was OK1DFC /CW and JT and also ES5PC on JT.
OK1DFC CW on 1.8 m dish here (mp3 file) : ok1dfc_at_SM0FOB.mp3

This is a happy Sven SM5LE and Kjell SM0FOB (behind the camera) in my garage radio shack.
More abt "Mesh Feed" here : http://web.telia.com/~u14901546/home_page_no_3.htm#Meshfeed
cm scale for plotting focus cm vs. ground noisecold/sky.
Mesh feed mounted. ("undercover")
SM0FOB´s 1.8m dish.
LNA for SM0FOB EME attempt :
Sven thinking ... I will take my spare (prototype) cavity-LNA and the FOB´s "LNA Technology" as 2nd stage...
That will end up with ~36dB gain and 0.38 dB NF , that will do for now ...
the ARRL contest 18-19 October getting closer and closer ...
1st cavity-LNA and coax-relay : #fig11
2nd: Some DC-conversion unit for bias etc : #fig2
3rd soldering a box : #fig3 #fig4 #fig5 #fig6
... and togrher with mesh-septum : #fig1 #fig7 #fig8
Going from 12x12 mm mesh to mosquito mesh does appr. +1 dB, for both TX and RX ! 1dB is like going from 90W to 110W TX power. The mosquito mesh is fitted outside the 12x12mm mesh with a hot glue-pistol and adjusted with a mould to get the right shape . #m1 #m2 #m4
Data for the mesh here (sorry for Swedish) #m5
The cost for the mesh is about 50 EUR for one 2m dish.
SM0FOB and SM5LE gang are trying to get the 1.8 m dish , @ Kjell´s QTH , to work , in both RX and TX mode !
(RX mode
already tested with a Helix feed)
A valiant attempt to revive the feeder made of mesh will be made.
We hope
to
be ready for
the ARRL contest 18-19 October.
Follow the exciting story, here ...
Today measured sun noise. Sun very close to trees.

Measured Y-value for sun was : 5.4 dB (1.8m dish) @ flux 71
Measured ground noise to cold sky and moved the mesh-feed forth and back to find focus point.
(The sun was not high up enough for doing sun/cold sky measurements.)
"0 cm" is the "theoretic cm" from formula 0.4=F/1.8 , in this case 72 cm.
The smaller the dish the closer to dish ... is Septum feed really the best for very small dishes ?
The length of feed is almost the same as the focus length ... ???
Kjell´s homepage here : http://sm0fob.blogspot.com/
Announcement : The small EME station at SM0FOB is closed. Dismounting already in progress.
It was just an experimental set up for testing the mesh feed , and also Kjell was on the moon for a short time.
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| Expanded dish ; was f/d=0.35 at 3.05m diameter, now it is f/d=0.30 at 3.6m dia. |
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WSJT JT65c WAV-file : W7UPF_JT65C.WAV (use "save target" ["spara som"] and open from inside WSJT)
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Measured focal maximum, vs. cm from theoretic , here called "0 cm".
(0 cm = 75 cm in my case , from bottom of the dish to the edge of septum [front face]).
Dish diameter 2.2 m and F/D 0.34.
The vertical scale is dB in WSJT echo-test and horizontal scale is deviation from zero (0) cm.
The dB value is mean value from # 20 echo transmissions. Measurements from two (2) different occasions.
One can see how easy it is to loose 2-3 dB if only cm is used !
In my case (small dish) the Septum should be 3-4 cm closer to dish than theoretic !
If I do the measurement / adjustment using echoes, the dish gain comes in the equation
twice, its more critical than using sun noise and so I get a sharper curve.
I will make some more measurements at next moon passage , making more points to get more precise curve. Maybe 0.5 cm per step.
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To days picture :
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Finally; I do hear my own echo’s by ear, occasionally at least … hr some mp3´s :
eko_1_OK.mp3 eko_2_OK.mp3 eko_3_OK.mp3
Echo_1 in freq. and time display , ~350 Hz
BW:
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SSB voice clip ,G4CCH Charlie Charlie Hotel.mp3
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Sun shadow from choke ring adjusted ! PICTURES CLICK HERE
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Summer 2006 - My N.A and S.A. window full of "greengrocery" January 2007.
Mesh spetum feed and all pictures abt TX RX etc: PICTURES CLICK HERE
All pictures abt dish here (this is a Picasaweb page) : DISH AND SHACK KLICK HERE
CW and SSB EME sound recordings 2.2 meter dish here : SOUND CLICK HERE
WSJT WAV files here : WAV CLICK HERE
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My horizon. All numbers are degrees. I need decl. > 10 dgrd.
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Echotest after new LNA. The "Cavity LNA".
Indicating ~1 dB improvement !

Meanvalue sig. -23.4 dB with Dgrd -0.8 dB
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WSJT echo test wtih old "Hairpin LNA"
Meanvalue sig. -24.2 dB with Dgrd -0.6 dB
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The conds the 8-9 Sept was bad ...
The mean value for 8 Sept is -28.47 dB and 12 July is -23.42 dB that's a difference of 5 dB but the Dgrd diff. only -0.8 dB ! It was bad conds the 7-8 Sept. Hi

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(Compared with "old Hairpin LNA")
aprox. 1 dB improvements !
Sun noise measurements. Difference between old "hair-pin" LNA and the new cavity LNA:
| Sun noise in dB | Solar flux | comments | |
| Old "hair-pin" LNA | 6.7 | 74 | mean value for several month |
| New cavity LNA | 8.1 | 78 | only two days measurements |
aprox. 1.4 dB improvements ! note: flux 74 and 78 difference is 0.2 dB
The groundnoise to cold sky did rise from 4.5 to 5.0 dB
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Echo testing with WSJT (TX:ed with WSJT4 and RX:ed with WSJT6).
Left "hairpin" LNA (NF=0.4dB) and right cavity LNA (NF=0.3 dB).
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Measured the difference for an OK1DFC septum feed with and without choke ring, on my 2.2 m dish.
Also measured was ; with poor, almost zero, grounding for the ring on the septum feed.
The outcome from these measurements must be that it is an advantage to have a choke ring also for a 2.2 meter dish.
|
All in dB |
(Choke ring not grounded) |
Septum feed alone |
Choke ring grounded |
Difference |
Comments |
|
Sun noise |
(5.5) |
5.4 |
6.3 |
0.9 |
Solar flux 72.5. |
|
Ground noise vs. cold sky |
(3.6) |
3.2 |
4.6 |
1.4 |
Grond noise are trees in this case. |
|
WSJT echo |
(-29.4) |
-28.2 |
-26.5 |
1.7 |
Both TX and RX are involved. |
Note: Test equipment; Attenuator R&S ”RF step Attenuator” 0.1 dB step and AC voltmeter HP400FL.
Measuring BW ~5 kHz (max for TS-2000) AGC off and RF gain middle , AF gain almust max.
The WSJT echo test is mean value for #20 TX/RX cycle (also note ; higher number [in -dB] is weaker signal).
The diameter for the ring is 42 cm and deep 12cm and possision behind rim 0(zero) λ .
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My E - mail address :