Re: [time-nuts] Parallel voltage regulators
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Bruce Griffiths wrote: Don Collie wrote: I`ve always wondered about noise from batteries - please tell us more Bruce!! [also wondered about noise from the electrolytic action of aluminium, and tantalum electrolytic capacitors, and wondered if the reference bypass capacitor in a 723 should be a plastic dielectric type, rather than electrolytic]. ...Don C. Further reference on battery noise: http://smirc.stanford.edu/papers/JAP_04_Electrode_Noise.pdf Above paper actually has some theoretical predictions. Bruce ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Parallel voltage regulators
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY From: Tom Clifton [EMAIL PROTECTED] Subject: Re: [time-nuts] Parallel voltage regulators Date: Fri, 26 Oct 2007 17:19:45 -0700 (PDT) Message-ID: [EMAIL PROTECTED] ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY This has been a fascinating and educational thread! I have always been aware of noise coming from switching regulators - just have Argo or Speclab look at your laptop's sound card with no input signal and there is plenty to look at until you go to battery power. I had never considered diode switching noise in linear supplies, nor birdies from an assortment of logic devices - though I am a believer in healthy distribution of bypass capacitors... They are sharp and unsteady oscillation is common, even on an old analogue synthesizer for instance. You can reduce it by putting bypass caps over the rectifying diodes. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: Need HP 7475A Drivers manuals
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Jeffrey, It would be greatly appreciated by many if you could carefully scan the manual and upload it before you sell it so that it would benefit many rather than one. Thanks in advance, Didier KO4BB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeffrey Pawlan Sent: Friday, October 26, 2007 10:41 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: Need HP 7475A Drivers manuals I have the ORIGINAL HP7475 Graphics Plotter SERVICE MANUAL dated June 1990. It has complete schematics, disassembly, adjustments, parts lists. I also have a rather extensive supply of new HP short pen style plotter pens and refillable accessories, a list 26 items long. Anyone interested? I would rather sell them to friends here than on ebay. 73, Jeffrey Pawlan WA6KBL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: Need HP 7475A Drivers manuals
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY The manual has been scanned already and is available at http://www.hpmuseum.net/exhibit.php?hwdoc=74 Eric (I didn't contribute it, Joseph Gray from this list pointed me there in a post that also went to the list I believe) On 10/27/07, Didier Juges [EMAIL PROTECTED] wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Jeffrey, It would be greatly appreciated by many if you could carefully scan the manual and upload it before you sell it so that it would benefit many rather than one. Thanks in advance, Didier KO4BB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeffrey Pawlan Sent: Friday, October 26, 2007 10:41 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: Need HP 7475A Drivers manuals I have the ORIGINAL HP7475 Graphics Plotter SERVICE MANUAL dated June 1990. It has complete schematics, disassembly, adjustments, parts lists. I also have a rather extensive supply of new HP short pen style plotter pens and refillable accessories, a list 26 items long. Anyone interested? I would rather sell them to friends here than on ebay. 73, Jeffrey Pawlan WA6KBL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: Need HP 7475A Drivers manuals
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY So many manuals, so little time :-) Thanks Didier KO4BB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eric Fort Sent: Saturday, October 27, 2007 10:03 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: Need HP 7475A Drivers manuals The manual has been scanned already and is available at http://www.hpmuseum.net/exhibit.php?hwdoc=74 Eric ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] manual scan.
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Yes, I will do that. 73, Jeffrey Pawlan WA6KBL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
