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Old 04-11-2010, 06:32   #61
FritzWue
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Osnabruck-A30-A31-Heek
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Old 04-11-2010, 13:13   #62
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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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Old 10-11-2010, 16:40   #63
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1. Gladenbach-Marburg-Dagobertshausen
2. Marburg-Elnhausen-B255-B277-A45-Meinerzhagen
No reception in the Dillenburg B277 tunnel.
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Old 11-11-2010, 14:58   #64
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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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Old 12-11-2010, 17:43   #65
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Bad Camberg-A3-A1-A43-Duelmen
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Old 12-11-2010, 20:55   #66
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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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Old 13-11-2010, 15:18   #67
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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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Old 14-11-2010, 12:46   #68
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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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Old 14-11-2010, 14:10   #69
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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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Old 18-11-2010, 18:33   #70
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Great results for five hours today.
Simone
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Old 18-11-2010, 21:42   #71
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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.
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Last edited by Digger : 18-11-2010 at 21:49.
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Old 22-11-2010, 21:23   #72
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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...
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File Type: png 7325-101122-0900-1020-HED362@CHE.png (37.9 KB, 32 views)
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Old 24-11-2010, 14:31   #73
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278 minutes of good decoding. The Doppler curve is pretty rough.
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Old 24-11-2010, 17:12   #74
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Quote:
Originally Posted by Digger
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.
You can kill the HUM in the DC completely, as you know, by just having 0.1uF capacitors across the diodes of the bridge or full wave rectifier. an essential need for Radio and for audio power supplies.
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Old 25-11-2010, 08:03   #75
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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.
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Last edited by Digger : 25-11-2010 at 15:34.
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