[time-nuts] oscillators

Don Latham djl at montana.com
Fri Aug 31 01:34:39 EDT 2012


Bob: Great minds run in the same track :-)
Don

Bob Camp
> Hi
>
> I think they would do better to just put in a connector to drive it with
> a TBolt
.
>
> Bob
>
> On Aug 30, 2012, at 8:47 PM, Don Latham <djl at montana.com> wrote:
>
>> Elecraft seems to be having some trouble with the KX3 stability for
>> WSJT
>> on 6m. They also have a temp sensor on the bard, apparently and are
>> also
>> trying this out. I don't know any more about it than that.
>> Don
>>
>> Jim Lux
>>> On 8/30/12 9:33 AM, Bob Camp wrote:
>>>> Hi
>>>>
>>>> The fundamental / third approach is one of several possible ways to
>>>> go. You
>>>> can also run an SC on the B and C modes to get thermometer data.
>>>> Early
>>>> implementations used a pair of independent blanks, one cut to be a
>>>> good
>>>> thermometer. Some have even gone as far as to mount a thermistor on
>>>> the
>>>> crystal.
>>>>
>>>
>>> I've used the "sensor on oscillator can" technique very recently on a
>>> software defined radio.  Over the next year, I'll get some data on
>>> how
>>> well it works in use.  The idea is to use a low power TCXO and a
>>> sensor,
>>> rather than an OCXO, to meet a fairly tight frequency requirement (a
>>> few
>>> hundred Hz out of 2 GHz)  The TCXO can get you do a few ppm or
>>> better.
>>> The sensor should let me get about an order of magnitude better, and
>>> I
>>> need to measure the temperature anyway, and it's easy to integrate
>>> with
>>> the software waveform code.
>>>
>>>
>>>
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>>
>>
>> --
>> "Neither the voice of authority nor the weight of reason and argument
>> are as significant as experiment, for thence comes quiet to the mind."
>> De Erroribus Medicorum, R. Bacon, 13th century.
>> "If you don't know what it is, don't poke it."
>> Ghost in the Shell
>>
>>
>> Dr. Don Latham AJ7LL
>> Six Mile Systems LLP
>> 17850 Six Mile Road
>> POB 134
>> Huson, MT, 59846
>> VOX 406-626-4304
>> www.lightningforensics.com
>> www.sixmilesystems.com
>>
>>
>>
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>
>
> _______________________________________________
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>


-- 
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
De Erroribus Medicorum, R. Bacon, 13th century.
"If you don't know what it is, don't poke it."
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com






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