To: | [email protected] |
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Subject: | Re: LF: SAQ Transmissions 29.06.03 |
From: | "Dick Rollema" <[email protected]> |
Date: | Mon, 14 Jul 2003 16:06:31 +0200 |
In-reply-to: | <000201c34989$77d809a0$d258893e@c9b3d1> |
Reply-to: | [email protected] |
Sender: | <[email protected]> |
Dear Ed, 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: Hi Group, |
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