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October 3rd 17, 01:13 AM
posted to rec.radio.amateur.moderated,rec.radio.amateur.equipment
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QRZ Forums - Radio Circuits, Repair & Performance for Monday 2 October 2017
Radio Circuits, Repair & Performance
/////////////////////////////////////////// Power Topologies Handbook : Texas Instruments Posted: 02 Oct 2017 04:12 PM PDT https://forums.qrz.com/index.php?thr...uments.583321/ Power Topologies Handbook by Markus Zehendner and Matthias Ulmann Texas Instruments https://www.ti.com/seclit/ug/slyu03....quasegment-wwe This book shows waveforms and equations of the most common hard switched power supply topologies and the soft switched Phase-Shifted Full-Bridge. /////////////////////////////////////////// ICOM 756 PRO display issue Posted: 02 Oct 2017 08:49 AM PDT https://forums.qrz.com/index.php?thr...-issue.583267/ I came across an interesting problem on an Icom 756PRO. The issue is with a control board. The board works perfectly but the display is monochrome, specifically green letters on a black background only. This condition exists regardless of the display option settings. This is strictly a control board issue as with another control board installed in the radio the display is fine. Any Icom experts out there that have ideas? |
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