. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. EHT SUPPLIES The design of RF EHT transformers has been discussed by Barron^^ Alternatively a range of ready-made coils are available from a number of firms specializing in EHT generation equipment. Stabilization of EHT is particularly easy to accomplish using the RF method. Lowe^^ describes a circuit for supplying Geiger-Muller tubes /mnrrv 0 +350 v' AOmA 22K. Figure which has a change of output voltage of less than 0-1 per cent for a 10 per cent change in the HT voltage sup
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. EHT SUPPLIES The design of RF EHT transformers has been discussed by Barron^^ Alternatively a range of ready-made coils are available from a number of firms specializing in EHT generation equipment. Stabilization of EHT is particularly easy to accomplish using the RF method. Lowe^^ describes a circuit for supplying Geiger-Muller tubes /mnrrv 0 +350 v' AOmA 22K. Figure which has a change of output voltage of less than 0-1 per cent for a 10 per cent change in the HT voltage supplying the oscillator, or for a variation in output current from zero to 32 ^A (full load). The scheme is shown in outline in Figure A fixed fraction of the output voltage is taken by i?i and /?2 ^rid applied to the direct-coupled amplifier valve V^. Since the + 315 V Unstabilized 1600 V -C EHT <. 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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