. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. COUNTERS very negative and in consequence the glow moves there, only to be auto- transferred to the « + 1th cathode. It might seem at first sight that the first and third guides might be dis- pensed with; that the leading edge of the transfer pulse could be used to move the glow from nth cathode to a guide, and the trailing edge would then move it on the « + 1th cathode. The difficulty is to prevent its moving back to the nth again. In point of fact single-guide tubes do exist; specially
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. COUNTERS very negative and in consequence the glow moves there, only to be auto- transferred to the « + 1th cathode. It might seem at first sight that the first and third guides might be dis- pensed with; that the leading edge of the transfer pulse could be used to move the glow from nth cathode to a guide, and the trailing edge would then move it on the « + 1th cathode. The difficulty is to prevent its moving back to the nth again. In point of fact single-guide tubes do exist; specially shaped electrodes ensure that transfer occurs in the required direction. ⦠300 __â+A75V 330pF "L-T 1M UO V drive pulse, not less than 25 psec long. Carry 20 V Figure A GC 10 D can be driven from another GC 10 D via a GTE 175 M high- speed trigger tetrode at rates up to 1,000/sec. The necessary circuit is shown in Figure , and is reproduced from part of reference 4 in this chapter. + 300 '130 k 330 k From output cathode of __^_ GTE175M previous GCIOD IM w â¢150k 330pF To circuit of â *" Figure AM9 370pF lOM -100V Figure A scaler for radioactivity measurements using dekatron counters has been described by Florida and Williamson^^. Kerkut^^ has given details of a dekatron action-potential counter. The time marker, employing dekatrons, published by Kay has already been mentioned. 653. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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