[time-nuts] Re: Tbolt

Thu Jul 22 14:11:59 UTC 2021

If some one has a bad one how about opening it and take some pictures. Would be very informative.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Bert KehrenÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Â Â In a message dated 7/22/2021 9:59:11 AM Eastern Standard Time, time-nuts at lists.febo.com writes:Â 
Attached is a plot of EFC versus Frequency of a Vectron pulled from a Tbolt. EFC is + and -.Â  Â I suspect that the units are shipped with the EFC set at 0 Volt. Notice 0 VoltÂ  Â Again I suspect the extra pin isÂ  there for that purpose. Bob could tell us but may not want to comment to stay out of trouble.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Bert KehrenÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Â In a message dated 7/22/2021 5:01:10 AM Eastern Standard Time, time-nuts at lists.febo.com writes:Â 
On 22/07/2021 08:30, time-nuts-request at lists.febo.com wrote:> Message: 1> One more comment on the Vectron OCXO. My Tbolt shows a tuning voltage of +0.4 Volt and has 3.6 Hz per Volt. Assuming the OCXO was sold to Trimble with 0 V and my unit has at least 12 years on it (4380 days) aging is 3.29 E-11 per day. Not bad for anÂ  OCXO.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Bert KehrenÂ ------------------------------------------------------------------------Â Hi.Â According to Lady Heather, My T'bolt sits with it's DAC at about 0.2VÂ Â  I always wonder about that.Â From the above comment, is the DAC output (and VCXO input I guess) bipolar, as in can range +- some amount from 0V?Â I've not seen any schematics for them, so in honesty haven't a clue what it's likely range is, good bad or indifferent.Â I did email TVB direct about the possibility of sourcing another one or two of them, but as he said (and I guessed) he was swamped with responses.Â I use mine mainly as a frequency reference, powered on 24/7Â Regards to All.Â Dave G8KBV (In the UK as far as I can tell.)Â Â -- Created on and sent from a Unix like PC running and using free and open source software:Â _______________________________________________time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe send an email to time-nuts-leave at lists.febo.comTo unsubscribe, go to and follow the instructions there._______________________________________________
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