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Thanks, but these days putting together circuit boards is a bit more than I'm capable of (and has never been a strong point of mine, anyway). [:)] But I'm curious about your comment about 'diode-drop detectors' -- are you saying that about the BD4, or about Rob's home-brew detectors? <br /> <br />Actually, the more I look at it the more Rob's detector looks like a variation on the NCE BD-20, which is a single-block detector rather than a dual-block detector.
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