[time-nuts] Symmetricom X72

[Stan, W1LE]

The Trimble Thunderbolt GPS/DOs have been on a nice learning curve. Lady 
Heather helps alot to understand what is going on.

Checking and calibrating your freq counter to the stuff you have at work 
is a great idea.
Just keep in mind the basic accuracy of the aade stuff, after you get 
back home.

For my 10 GHz transverter I use a externally boxed up ISOTEMP 10 MHz 
xtal bases OCXO with voltage control.
Before a radio contest I will warm up the OCXO for a few days, then I 
measure it with a freq counter using the GPSDO as reference.
Adjusting as needed.

I do not think you can go wrong with  a Trimble T'Bolt. Cost effective fun.

Stan, W1LE



On 7/24/2010 3:32 PM, Heathkid wrote:
> Hello Bob,
>
> What would you recommend?  I already have three FE-5680A Rb standards 
> (which I'm quickly learning likely aren't worth the powder to blow 
> them to (*insert your own word here*).  Okay, that was probably my 
> first mistake (thoughts?).
>
> My frequency counter is one I built from a kit from aade.com that has 
> the TCXO option (although I had to tweak it myself so I have NO idea 
> how close it is to any accuracy or precision).  I have access to some 
> really nice HP counters at work so that's my next step is to try one 
> of those.  My DFD4 measured the output of one of my 5680A's to 
> 10.000.007 MHz after about a 10 minute warm-up.  I don't know which 
> one is off.  Reading the specs on the 5680A's before I bought them 
> looked like they were pretty decent.  I'm learning...
>
> So, what "reasonably priced" Rb standard would you recommend?
>
> Should my next step in this process be a Trimble Thunderbolt?  Am I 
> starting over?
>
> Thanks...
>
> ----- Original Message ----- From: "Bob Camp" <lists at rtty.us>
> To: "Discussion of precise time and frequency measurement" 
> <time-nuts at febo.com>
> Sent: Saturday, July 24, 2010 9:31 AM
> Subject: Re: [time-nuts] Symmetricom X72
>
>
>> Hi
>>
>> At least looking at the spec sheet it's not really very impressive.
>>
>> Bob
>>
>>
>> On Jul 23, 2010, at 11:06 PM, Heathkid wrote:
>>
>>> Hello.  Does anyone have any experience with the Symmetricom X72?
>>>
>>> Thanks...
>>>
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>>
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