|Subject:||Re: LF: SAQ Transmissions 29.06.03|
|From:||"Dick Rollema" <[email protected]>|
|Date:||Mon, 14 Jul 2003 16:06:31 +0200|
From the messages on this reflector it is evident that quite a few amateurs received SAQ OK, using different types of receiver.
Last year I measured the field strength of SAQ at my location as more than 400 microvolt/metre, so a respectable signal.
But is important that the aerial system is more or less tuned to 17.2kHz.
I used the aerial system for the 136kHz band with 26nF extra in parallel with the tuning/matching coil to make the system resonant at 17.2kHz.
The receiver was a Wandel & Goltermann selective level meter type PSM-12, connected to a tap near the bottom end of the tuning coil.
But you don't need such a sensitive instrument at all.
Jim, M0BMU, made and used an electro-mechanical receiver (a design in harmony with the alternator transmitter) without any amplification at all, that was described in RadCom of March 2002.
73, Dick, PA0SE
At 22:53 13-7-03 +0100, you wrote:
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