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04-11-2010, 07:32
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#61 |
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Registered User
Join Date: Mar 2003
Location: 40km west of Muenster,NRW,Germany
Posts: 6,000
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DRM car radio
Osnabruck-A30-A31-Heek
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Friedrich.....DK6QI.....52°N 07°E |
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04-11-2010, 14:13
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#62 |
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Registered User
Join Date: Nov 2002
Location: Athens - Greece
Posts: 5,697
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Nov. 04
Hi all,
A weak signal getting better towards time. Good results with low SNR, being out of the target area, using the loop to avoid the QRM.
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Regards, John. |
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10-11-2010, 17:40
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#63 |
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Registered User
Join Date: Mar 2003
Location: 40km west of Muenster,NRW,Germany
Posts: 6,000
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DRM car radio
1. Gladenbach-Marburg-Dagobertshausen
2. Marburg-Elnhausen-B255-B277-A45-Meinerzhagen No reception in the Dillenburg B277 tunnel.
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Friedrich.....DK6QI.....52°N 07°E |
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11-11-2010, 15:58
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#64 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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Almost 100% decoding in this 68 minutes long log. The high SNR seems to be history now?
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12-11-2010, 18:43
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#65 |
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Registered User
Join Date: Mar 2003
Location: 40km west of Muenster,NRW,Germany
Posts: 6,000
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DRM car radio
Bad Camberg-A3-A1-A43-Duelmen
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Friedrich.....DK6QI.....52°N 07°E |
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12-11-2010, 21:55
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#66 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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265 minutes of reception. Good or bad I can't say, as I think my whip had come loose from the antenna during the storm today. Well...
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13-11-2010, 16:18
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#67 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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Today's log looks much the same as yesterday's. Tomorrow I'll try my Roadstar instead. The log was mostly unattended.
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14-11-2010, 13:46
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#68 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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A test with two receivers on the same antenna. The Channel Impulse Response was not very good at the beginning. After 13 UTC the reception was perfect. I wanted to compare the two receivers, therefore I left out the bit after 13 UTC. The FRG-7700 performed better with 92% decoded audio; the Roadstar logged 72%.
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14-11-2010, 15:10
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#69 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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Another log comparing the FRG-7700 and the RF-B60, the latter with an improved 100 VAC power supply. Yes, in Japan they use 100 VAC, 60 Hz (where I reside, 100 V, 50 Hz a bit further east
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18-11-2010, 19:33
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#70 |
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simone
Join Date: Jan 2003
Location: Bad Salzschlirf, Hessen, Germany
Posts: 10,144
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Great results for five hours today.
Simone |
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18-11-2010, 22:42
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#71 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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Quite good results in this (mostly unattended) 258 minutes long log. 99.6% decoded audio. The SNR with this receiver has improved with the new Power Supply. Hum in the DC affects both the active antenna and the receiver and the converter as well.
Last edited by Digger : 18-11-2010 at 22:49. |
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22-11-2010, 22:23
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#72 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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Roughly the same result today, but the log is not as long as the previous one.
Oops, I had one more log from this morning too... Last edited by Digger : 22-11-2010 at 22:26. |
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24-11-2010, 15:31
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#73 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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278 minutes of good decoding. The Doppler curve is pretty rough.
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24-11-2010, 18:12
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#74 | |
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Registered User
Join Date: Apr 2007
Location: Hyderabad, India
Posts: 220
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Quote:
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Regards, Sarma ------------------ Elektor SDR 5/07- Elektor Preselektor - Miniwhip Antenna of PA0RDT |
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25-11-2010, 09:03
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#75 |
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Registered User
Join Date: Mar 2005
Location: Near Stockholm, Sweden
Posts: 8,460
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[quote=mvs sarma] 0.1uF capacitors across the diodes of the bridge...[quote]
Yep, I have practiced that since 1975 !  Today's Doppler log looks the same as the previous log of mine. Probably a propagation issue. The log is almost 4 hours long. Last edited by Digger : 25-11-2010 at 16:34. |
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