[time-nuts] HP 10811 update

paul swed paulswedb at gmail.com
Fri Jul 26 13:55:40 EDT 2013


Yes thanks ran across it. Skimmed it. Did not think I would be doing it. :-)


On Fri, Jul 26, 2013 at 1:15 PM, Ed Palmer <ed_palmer at sasktel.net> wrote:

> Hi Paul,
>
> Did you see this page that talks about tweaking the 10811 oven controller?
>
> http://www.realhamradio.com/**z3801a-turning-point.htm<http://www.realhamradio.com/z3801a-turning-point.htm>
>
> Ed
>
>
>
> On 7/26/2013 10:47 AM, paul swed wrote:
>
>> sounds like time to add a R across the temp set R. That will lower the R
>> and raise the temp. Its also easy to actually do.
>> Thanks
>>
>>
>> On Fri, Jul 26, 2013 at 12:08 PM, Bob Camp <lists at rtty.us> wrote:
>>
>>  Hi
>>>
>>> HP spec'd the crystals to be at a < 1x10^-8 / C slope at the marked
>>> temperature on the crystal. The center of the curve should be in the
>>> vicinity of 90C.
>>>
>>> You are ~ -4.5 x 10^-6 low, so that would be > 10 C away from that point
>>> going cold and a bit further going hot. Since the oven is at ~80C, it's
>>> not
>>> to hot…
>>>
>>> Bob
>>>
>>>
>>>
>>>
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