Hi Time Nuts: I've been lurking for a while now... reading the posts.
I have just got an HP 105B, which is in good shape, and has a new/replaced NiCad battery pack, and was calibrated against a rubidium oscillator (standard?). NiCads don't like me... does anyone have recommendations/commiserations, concerning their care. Best regards and wishes. Roy ________________________________ From: time-nuts <[email protected]> on behalf of [email protected] <[email protected]> Sent: April 24, 2019 12:00:02 PM To: [email protected] Subject: time-nuts Digest, Vol 177, Issue 29 Send time-nuts mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of time-nuts digest..." Today's Topics: 1. OSC value with Lady Heather (Giuseppe Marullo) 2. Re: Z3801 Power Supply Schematic (RICHARD GOLDING) ---------------------------------------------------------------------- Message: 1 Date: Wed, 24 Apr 2019 08:51:44 +0200 From: Giuseppe Marullo <[email protected]> To: [email protected] Subject: [time-nuts] OSC value with Lady Heather Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Is it possible to display the actual OSC value instead of ppt? I tried /tx but surely I am doing something wrong. Yes, I am European, lol. TIA. Giuseppe Marullo IW2JWW - JN45RQ ------------------------------ Message: 2 Date: Wed, 24 Apr 2019 14:46:06 +0000 (UTC) From: RICHARD GOLDING <[email protected]> To: [email protected] Subject: Re: [time-nuts] Z3801 Power Supply Schematic Message-ID: <[email protected]> Content-Type: text/plain; charset=UTF-8 Many thanks to those who took the trouble to send me schematics of the Z3801a PSU. I'm pleased to report that, using, the schematic, I was able to trace and fix the fault and that GPS lock led is glowing again. The problem was a faulty regulator IC (U2 LM317) that had decided to produce 1.8V instead of 2.5V, which resulted in the PSU thinking that the input supply voltage was out of range. It does seem a very complicated circuit for what could be straightforward voltage window comparator. i.e. 24R's, 8 Diodes, 3 regulators, a comparator and logic IC + a handful of Mosfets! Thanks again for those that helped. 73 Richard, G3VZG ? ?? ------------------------------ Subject: Digest Footer _______________________________________________ time-nuts mailing list [email protected] http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com ------------------------------ End of time-nuts Digest, Vol 177, Issue 29 ****************************************** _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
