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From: Leif Asbrink <l...@sm5bsz.com>
Date: Thu, 14 May 2009 21:33:54 +0200
Local: Thurs, May 14 2009 3:33 pm
Subject: Re: Receiving sometimes stop
Hello Isao,
> At this moment I have another problems. One is receiving In case your power supply becomes overheated so it switches > sometimes stops (noise level downs -5dB and receiving > internal birdie only) for 5-20 minutes and returning. I > guess my power supply cause a trigger and already ordered > new one. But anyone has same problem and fixed, please > let me know your detail. off or reduces the +15 or -15 DC supply (or both) you should see it easily with a volt meter. I am not aware of anything else that could produce a similar effect. Maybe better positioning could improve coolign? > Two is a internal birdie on center frequency of each pass The center frequency corresponds to DC voltages and they > band. In problem one situation, also it is. are not amplified by the Delta 44. Near the center frequency there is 1/f noise. The normal behaviour The center spur can be slightly reduced by modifications on the During normal operation on 144 MHz when your preamplifier should 73 Leif / SM5BSZ You must Sign in before you can post messages.
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