HILFE:HENE Netzteil Problem
Posted: Mon 30 Apr, 2001 9:04 pm
hallo, kann mir jemadn helfen, ich habe einen HeNe ohne Netzteil und dieses wollte ich mir nun bauen!Ich hab nur ein Problem, ich weiss nicht welche daten der Trafo haben muss, es steht auch nix dran. und dieses teil SG1 6.5kV, was ist das überhaupt und wo bekommt man das?<BR>Der plan steht hier:<BR><A HREF="http://www.laserfaq.de/207apsch.pdf" TARGET=_blank>HENE Netzetil SP 207</A>.<BR>Wäre nett wenn mir jemand helfen könnte!<P>Nachfolgend hab ich mal ein bisschen aus der faq kopiert, vielleicht hilft das ja weiter!!!<BR>Spectra-Physics Model 207 Exciter (SP-207)<BR>The SP-207 is apparently intended for use with the SP-107 which is similar to the SP-127 but configured in an open resonator for OEM applications. It is sort of a stretch version of the very popular SP-124B. The overall design of the SP-207 exciter is very similar to that of the SP-255 (above) but has a higher operating voltage and a greater compliance range. <BR>Like the SP-255, the SP-207 is an AC line powered supply using a linear regulator and voltage multiplier starter. The major obvious difference between them is that the SP-207 uses 11 transistors in the linear regulator compared to 7 for the SP-255. <P>Estimated specifications (SP-207): <P>Operating voltage: 6,000 V. <BR>Operating current: 7.5 to 17.5 mA. <BR>Starting voltage: 15,000 V. <BR>Compliance range: 3,000 to 6,000 V at top of ballast resistor. <BR>The design is mostly similar to other line powered HeNe laser power supplies with the normal doubler and a 3 stage voltage multiplier. The regulator uses a Darlington for the bottom transistor and ten MJE3439s for the others. Using the 8.2 V zener (D108) as the voltage reference, the tube current will be approximately: (8.2 - 1.4)/(390 + R118) or about 7.5 to 17.5 mA. <BR>One interesting twist is the use of the bypass diode, D104, which appears to protect the regulator from excessive voltage during a short circuit - it passes current around the regulator when the voltage across the regulator exceeds about half the output voltage of the rectifier/filter. <P>The schematic for SP-207 is available in both PDF and GIF format: <P><BR>Get 207-PWR-SCH: 207apsch.pdf or 207apsch.gif.