All Forums  GQ Electronics Forums  2.GQ Geiger Muller Counter  remote GM tube connected with coax

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by rogerroentgen[/i] [br]I'm interested in connecting my tube(s) remotely from the GMC-300e+ hardware. I'm considering using coax, possibly with a BNC connection. My first question about this is regarding the coax. I understand the coax will introduce changes to the circuit operation, especially if it is long. What changes would need to be made to the GMC to account for the addition of coax between the hardware and the GM tube? I was considering hard wiring coax instead of using a connector (BNC), but I was considering using RG-6 because I can get long lengths for free. this is a 75ohm coax instead of 50ohm. would that cause any other issues for this purpose? Also, I think the 300E+ circuit counts pulses from the ( - ) connection of the tube? If that is true, it seems better to run negative ( - ) on the center conductor of the coax to shield the signal. is that correct? [/quote]    Insert an Image File Check here to include your profile signature.