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

[Bob kb8tq]

Hi

My advice: Pull out the nicads and run the device on a normal UPS if you actually need 
power backup. When the UPS bites the dust … replace it. Much easier than keeping
the batteries in these devices happy.

Bob

> On Apr 24, 2019, at 11:53 AM, Roy Thistle <roy.thistle at mail.utoronto.ca> wrote:
> 
> 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
> 
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> 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
> ? ??
> 
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> End of time-nuts Digest, Vol 177, Issue 29
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