[time-nuts] time-nuts Digest, Vol 177, Issue 29

[Roy Thistle]

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 <time-nuts-bounces at lists.febo.com> on behalf of time-nuts-request at lists.febo.com <time-nuts-request at lists.febo.com>
Sent: April 24, 2019 12:00:02 PM
To: time-nuts at lists.febo.com
Subject: time-nuts Digest, Vol 177, Issue 29

Send time-nuts mailing list submissions to
        time-nuts at lists.febo.com

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
        time-nuts-request at lists.febo.com

You can reach the person managing the list at
        time-nuts-owner at lists.febo.com

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 <giuseppe at marullo.it>
To: time-nuts at lists.febo.com
Subject: [time-nuts] OSC value with Lady Heather
Message-ID: <0a87064f-23f6-926a-671c-ccefba0c09fc at marullo.it>
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 <rngolding at aol.com>
To: time-nuts at lists.febo.com
Subject: Re: [time-nuts] Z3801 Power Supply Schematic
Message-ID: <1237404332.3862013.1556117166643 at mail.yahoo.com>
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
time-nuts at lists.febo.com
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com


------------------------------

End of time-nuts Digest, Vol 177, Issue 29
******************************************