[time-nuts] Inside a CTS 1960017 OCXO

[Rob Sherwood.]

I have two Perseus, one in my Denver lab and one on loan to N0QO. Adam in Canada has his own Perseus, CTS module and some other lab supply.  

It looks like one of the disassembled CTS modules also has spurs in the 40 to 70-Hz range.  Some kind of oscillation.  

I'll get back to this issue after some other projects are finished.

Rob
NC0B


Sent from my iPad

> On Feb 29, 2016, at 1:01 PM, "Tom Holmes" <tholmes at woh.rr.com> wrote:
> 
> 
> 
> Rob...
> 
> Are you and Adam using the same Perseus receiver for your measurements?
> 
> Have you looked at another similar type (as in small PCB configuration) and powered (as in from your HP supply) oscillator for comparison?
> 
> Not to beat the PS question to death, but does a battery supply change the outcome?
> 
> Tom Holmes, N8ZM
> 
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Rob Sherwood.
> Sent: Saturday, February 27, 2016 7:20 PM
> To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
> Subject: Re: [time-nuts] Inside a CTS 1960017 OCXO
> 
> Both  Adam and I measure the same spurs.  Rob, NC0B
> 
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Graham / KE9H
> Sent: Saturday, February 27, 2016 2:08 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Inside a CTS 1960017 OCXO
> 
> 
> 
> Rob:
> Are you sure you were running it with a clean power supply?
> Any 60 Hz ripple on the supply could show up as AM/PM modulation.
> You might want to try another 5V power supply before you give up on the oscillator.
> --- Graham
> 
> 
> 
> 
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