To: | <[email protected]> |
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Subject: | Re: AW: LF: 8.97kHz antennas |
From: | "James Moritz" <[email protected]> |
Date: | Wed, 17 Mar 2010 23:47:04 -0000 |
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Dear Stefan, LF Group, DK7PC wrote:...>Jim, have you seen the output wave form? If it is not rectangular, it might be a problem if high accuracy is needed. You know, i have a switching mode PA... The soundcard output from the Spec Lab digimode terminal is a sine wave, about 2v pk - pk from my PC. But a simple limiting amplifier between soundcard output and gate driver input gives a quite accurate 50% duty cycle square wave - see attachment. Cheers, Jim Moritz73 de M0BMU
limiter_gate_driver.png |
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