Speck and radio

ZXNet echo conference «hardware.zx»

From Alexandr Kushnikov To All 16 October 2002

Greetings, All! Music antenna I have the center set somehow incorrectly. Regular staff The music center wiring is soldered to the indoor two-pin antenna from the TV. When radio operation on some stations, for example, 90.3 MHz, there is strong interference if Spec enabled Speck stands approximately 2.5 m from the music center. Also on The work of the music center is affected by my location in the room. Reasons for what is happening are clear enough to me. The question is how to effectively deal with this? It is even possible to move the antenna outside the window, but how to shield it? Best regards, Alexander Kushnikov aka Sander.

From Kirill Frolov To Alexander Araktcheew 3 December 2002

Press RESET immediately, Alexander! 28 Nov 02 22:55, Alexander Araktcheew wrote to Kirill Frolov: SK>>> Who told this joke? Or their own Teploukhov SK>>> developed theories? Power of 2 W at a load of 1 MΩ SK>>> will be released at a voltage of about one and a half kV. And in general SK>>> grounding something through a megohm resistor is pointless, however SK>>> more on the battery. KF>> But you must agree - this is a good and safe way. And like KF>> seems to be grounded, and nothing burned, no one got fried... AA> Only now the authors of such advice are fighting off Torres at Harvard AA> :) AA> People, decide what you need grounding for! 1). In order to connect together the common wire of all devices. 2). So that it is (for this there is advice with a 1M resistor). AA> If for what normal people understand by this, then without climbing AA> a shield is indispensable. There is no grounding in the shield either. As far as I understand, this is a grounded zero: F1 ------ -- Tr-tr F2 ------ -- -- F3 ------------------- consumer 0 --------+---------- |--- - Am I right? AA> And if you also know how it is measured, then the battery will disappear AA> final. Why is it not needed to ground the computer? Justify. In my opinion it fits very well.