[time-nuts] Re: 50KHz modulation on 5Mhz output

[Bob kb8tq]

HI

Probably worth poking the supply rails with a ’scope to see what you find. 

Bob

> On Jun 6, 2021, at 1:29 PM, Shawn <comsec at xmtservices.net> wrote:
> 
> Its the Stock Linear AC Supply built into the MRT chassis.  I dod
> replace the filter cap, it was pretty bad.  I am implementing a DC
> battery system for the workbench, don't trust UPSs much but not there
> yet. 
> 
> 
> On Sun, 2021-06-06 at 13:05 -0400, Bob kb8tq wrote:
>> Hi
>> 
>> Do you have a switching power supply driving the Efratom through the
>> DC 
>> input? Sounds a lot like a switcher with an output cap / output
>> filter issue.
>> 
>> Bob
>> 
>>> On Jun 6, 2021, at 12:18 PM, Shawn <comsec at xmtservices.net> wrote:
>>> 
>>> Hi Guys,
>>> 
>>> The question I was going to ask about.
>>> 
>>> It's getting warm around here and i had switched my RF workbench
>>> off
>>> the 5065 to an Efratom MRT clock, its setup for high temp
>>> operation.
>>> 
>>> Well started having some wierd iisues and found that every signal
>>> generator had a 50KHz signal riding their output, swapping back to
>>> the
>>> 5065 the problem goes away.  
>>> 
>>> Ideas?  Anyone had this kind of thing happen?
>>> 
>>> 
>>> Shawn
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