SLA> Naw, there are only two and I replaced em both. One of the 820s was SLA> shorted, but so was just about everything else in the tool (it is an oil SLA> well logging tool). They dump a high voltage pulse from an inductor into a SLA> ultrasonic magnorestrictive transducer at 20 cps. I don't seem to have SLA> enough trigger pulse to make em work. Would the 820 be more sensitive than
How is the trigger pulse generated and what does it look like right now? If the original MOSFET was shorted, it probably also shorted either drain or source to the gate. This might have killed the driver circuit either by overloading it (short to ground) or by bypassing the high voltage pulse directly into the driver.... SLA> the 840 with regard to the trigger pulse? Most of these type tools use an SLA> SCR; this is my first experience with a mosfet fired transmitter. Uwe. -- Author: Uwe Zimmermann INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
