[time-nuts] Lucent KS-24361 24V DC power requirements

Bob Camp kb8tq at n1k.org
Fri Nov 21 21:17:36 EST 2014


Hi

We’ve been around this one before. The KS boxes are powered by a switcher brick inside the box. There’s not a lot of reason go super crazy on the DC input. It’s fully isolated from the case ground. Even leakage / stray grounds should not be an issue in this situation. I would not run it off of raw un-filtered rectifier output. Anything that’s at least got a filter capacitor in it should do fine.

Bob

> On Nov 21, 2014, at 3:19 PM, Neil Schroeder <gigneil at gmail.com> wrote:
> 
> I drive my prs10 with a parallel pair of ldos balanced by an op amp. I'll
> draw it out and post it if you like.
> 
> On Friday, November 21, 2014, Azelio Boriani <azelio.boriani at gmail.com>
> wrote:
> 
>> At most you need 2.4A (when the two OCXOs are heating up): a 2.5A
>> supply is needed.
>> 
>> On Fri, Nov 21, 2014 at 6:25 PM,  <planophore at aei.ca <javascript:;>>
>> wrote:
>>> Good day all,
>>> 
>>> I have been following the discussions as best as I could. I recell seeing
>>> the question asked or at least theorized as to what is the power
>>> requirements of these units - either individually or together.
>>> 
>>> I have reviewed all messages or at least all that I can find in these
>>> threads but I couldn't find a definitive answer unless of course the
>>> answer is in one of the responses hiding where I haven't looked.
>>> 
>>> I purchased a set of these modules and they are currently in transit but
>>> I don't have a 24V DC supply at the moment.
>>> 
>>> So, in order to try and get ahead before the arrival of these modules I
>>> would like to at least plan out if not get a suitable power supply
>>> ready. I don't want to over specify by too much and worse yet, under
>>> specify.
>>> 
>>> Has anyone actually made any power used measurements of these modules? 2A
>>> average, 4A peak? Somewhere inbetween or more?
>>> 
>>> cheers, Graham ve3gtc
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