1st part:
Checking loop antenna in inductive or direct connection
Date of experiment : 9/2/2k
QTH: Retziki 20N 23E Thessaloniki , reception made outdoors ( not inside the house)
An experiment with this 1 x 1 m loop antenna , with direct connexion and inductive tuned connection
The antenna was in fixed position Preamp was on ( + 10 db)
win |
S |
S-direct |
STN |
8 |
2 |
- |
|
|
9 |
2 |
|
|
3 |
- |
|
|
3 |
- |
|
|
9 |
4 |
|
7 |
9+10 |
9 |
|
7 |
8 |
5 |
|
|
5 |
2 |
|
|
4 |
2 |
|
|
9+10 |
6 |
|
|
5 |
- |
|
7 |
3 |
- |
|
6 |
8 |
5 |
|
6 |
6 |
3 |
|
|
|
4 |
FR |
|
|
7 |
TU |
|
|
3 |
|
|
|
5 |
æTHSÆ beacon |
Result:
Direct connection does not offer antenna tuning operation , but shows a constant (?) gain on all the LF bands but inductive coupling can offer better signals abt 12-15 db
Legend :
QRG : frequency
Win: windings
S ; S meter with inductive coupling , properly tuned
S- direct : direct connection to receiver
S meter readings: S2/S1 = 6 db ( 4 times stronger)
Over S9 readings always per 10 db ( x 10)
PART 2
Resonance of the 1 x 1 m antenna
Mysteriously , the 1 x1m antenna shown some resonance with ONLY the wideband receiver MVT7100 by direct or by indirect (inductive coupling) but with R-75 it did not shown any resonance except what the R-75 should listen !
Direct connection with MVT 7100 :
Windings | Freq bands |
8 | ? |
7 | 9.5 MHz |
6 | 11.5? |
5 | |
4 | 13.6 at max |
3 | 17.5 |
2 | co conn |
1 | 17.5 |
Inductive coupling with 900 pF capacitor ( always used) and MVT7100 and 3 m double wire connection
Windings | Freq bands |
8 | MW |
7 | MW |
6 | MW |
5 | |
4 | 5.4-4.2 |
3 | 5.8-3.7 |
2 | co conn |
1 | 6.8-7.5 |
Part 3
LOGS MADE WITH THE 1 x 1 m antenna
Date: 11-2-2k
QRG | Stn | UTC | comments | Signal | S meter reading |
1413 |
R National 5 SP |
2022 |
talks by man 33433 mix with BBC? |
33423 | |
1422 |
Dfunk GE |
2015 |
nice guitar play ID ayt 2025 , |
43443 |
|
1431 |
RAI 2 |
2025 |
music and talks much of echo ( Lux effect or twin xters?) |
3?423 |
[9] |
1449 |
RAI 2//1431 |
2033 |
news 32443 [7] carrier on +300 |
||
1485 |
Rai 2 //1431 |
2040 |
adverts |
22412 |
|
1575 |
RAI |
2048 |
interview |
44444 |
[S9+10] |
1611 |
R vaticano |
2052 |
in pilipino (?) and EG words , seems discussion , prg on valentine |
44444 |
|
1600.75 |
ERA 2 |
2055 |
r. stn , traditional sx , LSB only |
33443 |
|
1368 |
RAI 3? |
2120 |
variety prg Galei Zahal underneath |
44444 | [S9] |
1296 |
COPE û SP |
2127 |
talks, signal otherwise covered by Bulg |
22422 |
|
1268 |
COPE? |
2133 |
talks in SP ----- |
||
1242 |
Kiev |
2137 |
old RR songs |
2xxx2, |
|
1242 |
MRT-Skpj |
2137 |
ID??( hrd once only) |
|
[S3-4] |
1242 |
R Bleu ûFR |
2136 |
( main signal this QRG )music |
|
[S7] |
1170.9 |
R Kapodistria SVN 2148 |
ID 2148 |
nice pop songs |
43443 | |
1143 |
RAI |
2200 |
songs, talks |
32xx3 |
S9] |
1053 |
COPE |
2206 |
talks by 2 OM |
43443 |
|
1035 |
RAI |
2210 |
songs not suffreed by the local stn on 1044[S9+20] |
34433 |
[S8.5] |
873 |
AFN ûG |
2226 |
interviews , AmE |
22422 |
|
831 |
R Damask |
2232 |
SYRIA talk OM , YL and msx, |
|
[S5] |
675 |
R 10-FM |
2246 |
HOL song , ID 2246 , old songs |
33443 |
|
527 |
R vaticano |
2309 |
music , 2312 ID , carrier +USB |
323 |
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