[time-nuts] time-nuts Digest, Vol 156, Issue 35 (5065A Pwr Xfmr - Too high output voltage)

Ulf Kylenfall ulf_r_k at yahoo.com
Sat Jul 29 04:13:21 EDT 2017

That was a brilliant idea...
...until I realized that I needed 115V for the XO quick-heaterand we use 230V in Europe...
So the SMPS splution will not work for me.
I will use an old (dual primary winding) linear supply which has the advantage of providinga regulated 24V that can be used for the heater windings of the rubidiumcavity.
Ulf - SM6GXV

      From: "time-nuts-request at febo.com" <time-nuts-request at febo.com>
 To: time-nuts at febo.com 
 Sent: Friday, July 28, 2017 6:00 PM
 Subject: time-nuts Digest, Vol 156, Issue 35
Send time-nuts mailing list submissions to
    time-nuts at febo.com

To subscribe or unsubscribe via the World Wide Web, visit
or, via email, send a message with subject or body 'help' to
    time-nuts-request at febo.com

You can reach the person managing the list at
    time-nuts-owner at 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. Re: 5065A - Looking for AC XFMR PAECO 9100-2742    specification
      (paul swed)


Message: 1
Date: Fri, 28 Jul 2017 11:21:51 -0400
From: paul swed <paulswedb at gmail.com>
To: Discussion of precise time and frequency measurement
    <time-nuts at febo.com>
Subject: Re: [time-nuts] 5065A - Looking for AC XFMR PAECO 9100-2742
    <CAD2JfAidmsnw5SUdWgndGTdaSASGJi8CShUBgW166hu3gSRDoQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

I looked at your site and the power supply. That makes a lot of sense.
Though I have not lost my transformer as Ulf has at least I see an answer
that I can use. I would have come up with the same approach but you did the
thinking for me.

On Thu, Jul 27, 2017 at 3:58 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>

> --------
> In message <675538475.428966.1501176257165 at mail.yahoo.com>, Ulf Kylenfall
> via t
> ime-nuts writes:
> >Removing that board I discovered that the "24-32V" raw DC was some
> >40 Volts.
> That's a bit on the high side, but not excessively so.
> HP tended to let the linear regulators shave a big slice in
> precision instruments, probably to make sure that absolutely
> no ripple makes it through.
> If I were you, I would ditch the transformer entirely, and go with
> an external DC PSU and put a high-quality DC/DC converter in the
> HP5065A
> See:
>        http://phk.freebsd.dk/hacks/HP5065A/20150930_dcdc/index.html
> --
> Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG        | TCP/IP since RFC 956
> FreeBSD committer      | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts
> and follow the instructions there.


Subject: Digest Footer

time-nuts mailing list
time-nuts at febo.com


End of time-nuts Digest, Vol 156, Issue 35


More information about the time-nuts mailing list