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KXBC3 clock accuracy?

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Julia Tuttle

KXBC3 clock accuracy?

Hi,

How accurate do folks find the RTC on the KXBC3 is? Mine seems to be
gaining a second or so a day and I want to know if this is within the
expected accuracy.

Thanks,

Julie
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Julia Tuttle

Re: KXBC3 clock accuracy?

That seems fine -- if I use it, it'll be for logging (I keep it in UTC so I
don't have to do math), not anything more precise. Thanks for the info.

73,

Julie

On Sun, Mar 7, 2021 at 7:36 PM Raymond Sills <[hidden email]> wrote:

> Hi Julie:
>
> From what I've read and what I've experienced with my KX3, that gain of 1
> second or so per day is about what I've noticed. I generally reset the
> clock before going out in the field. I have not used my KX3 (yet) with FT8
> or any digital modes that depend on a highly accurate clock, so I just use
> the rig clock for manual logging. And even then, it's as easy to use my
> cell phone for time of day.
>
> I think pretty soon we will see more rigs with an included GPS receiver
> for super accurate time.
>
> 73 and QSH de Ray K2ULR
> KX3 #211
>
>
>
>
> -----Original Message-----
> From: Julia Tuttle <[hidden email]>
> To: Elecraft <[hidden email]>
> Sent: Sun, Mar 7, 2021 7:20 pm
> Subject: [Elecraft] KXBC3 clock accuracy?
>
> Hi,
>
> How accurate do folks find the RTC on the KXBC3 is? Mine seems to be
> gaining a second or so a day and I want to know if this is within the
> expected accuracy.
>
> Thanks,
>
> Julie
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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Mike Morrow-3

Re: KXBC3 clock accuracy?

In reply to this post by Julia Tuttle

The accuracy and features of KX2 and KX3 RTCs are not good. What you report is likely better than typical. This is in spite of the use of a full-featured clock/calendar RTC chip.

I have never figured out how a $10 Casio watch will often gain or lose less than two seconds per month, yet Elecraft RTCs are exceptional if they perform that well after a single day.

I also don't understand why Elecraft RTCs don't use a 2032 cell capable of keeping them alive for many months with external power removed.

The Elecraft RTC is essentially a "token" RTC from which not much should be expected.

Mike / KK5F

-----Original Message-----

>From: Julia Tuttle <[hidden email]>
>Sent: Mar 7, 2021 6:20 PM
>To: Elecraft <[hidden email]>
>Subject: [Elecraft] KXBC3 clock accuracy?
>
>Hi,
>
>How accurate do folks find the RTC on the KXBC3 is? Mine seems to be
>gaining a second or so a day and I want to know if this is within the
>expected accuracy.
>
>Thanks,
>
>Julie