[HCDX]: Logs & experiments with RT75 & loop
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[HCDX]: Logs & experiments with RT75 & loop
Please advime me on how this material can be helpful to you . The 3rd part shows a line
of experiments with RT75 and 1x1 m antenna with direct and indirect ( tunable inductive
coupling ) connection for signals meant otherwise to be as DX.
---------
1st part Logs Rt75 and 8 m antenna ( SW)
10-2
CONGO 5985 R Gongo 2220 hilife songs , man in Arabic 22232 and less 2300 covered by R L
CUBA 6000 RHC (t) 2224 LA songs , political talks in SP 32322 , Very strong nearby QRM
even with passband lowr than 500 Hz , max S 7
11-2
RUSSIA 4795, prg in RR 2318 USB mode 232 no S indication
USA 6890 WGTG , prg Genesis 2326 good signal , S 3
USA 6975 RFPI 2326 with many ID s , prg on world economy and Nelson Mandela , good
USA 9955 WRMI 2340 ID trailer in EE And SS , 32232 strong QRM from TTY buzzer on 9956.5
Signal S6
UnIDed 4885 2258-2301 a transmission in SP , many references to Cuba ! poor signal
Part 2:
Small MW survey with RT75 and 1 x 1 m square antenna with inductive coupling ( date
11/2)
ON [ ] there are the S-meter units , no amplifier
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 2033 //1431 news 32443 [7] carrier on +300
1485 Rai 2 2040 //1431 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 44444 [S9] Galei Zahal underneath
1296 COPE ¯ SP 2127 talks 22422 , signal otherwise covered by Bulg
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 ¯FR 2136 ( main signal this QRG )music [S7]
1170.9 R Kapodistria SVN 2148 nice pop songs ID 2148 43443
1143 RAI 2200 songs, talks 32xx3[S9]
1053 COPE 2206 talks by 2 OM 43443
1035 RAI 2210 songs 34433[S8.5] not suffreed by the local stn on 1044 [S9+20]
873 AFN ¯G 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
-----------
Part 3
Masurements with RT75 and 1 x 1 m loop
Date : 9/2 /2k
An experiment with this 1 x 1 m loop antenna , with direct connexion and inductive
tuned connection
The antenna was not rotated . ie was only in one posistion and doesnot mean these are
the full signals for each station Preamp was on ( + 10 db)
QRG win S S-direct
546 8 2 -
568 9 2
576 3 -
596 3 -
728 9 4
792 7 9+10 9
810 7 8 5
884 5 2
909 4 2
936 9+10 6
981 5 -
1090 7 3 -
1278 6 8 5
1404 6 6 3
---
171 4 FR
178 7 TU
207 3
347 5 THS
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
Insterestingly , changing the winding connection from 8 to 7 or 6 ends did not show
any significant band change !!!
Legend :
QRG : frequency
Win: widings
S ; S meter with inductve coupling , properly tuned
S- direct : direct conexion to receiver
________________________________________________
Zacharias Liangas pen-DX sejak 72
anggota World-DX-Club 2104,Play DX,
updated web pages on www.geocities.com/Hollywood/Lot/2638 :
pirates.htm tv-litoh.html thesfm.htm tvstat.htm biblio.htm
and telenovelas page on telenovs.htm (every 2 weeks)
http://users.compulink.gr/zliangas
pesawat penerima : Lowe HF 150 , SONY IFC 7600 D ,Yupiteru MVT7100 scanner Philips 2935
antena 6 m & 11 m
accesories: handmade ATU,MFJ 1040 preselector,MFJ1025 noise canceller , MFJ 752c filter audio , MFJ16010 ATU
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