[time-nuts] Re: Thunderbolts ...

[Andy Talbot]

The LB uses a modern, third generation GPS module , Ublox 7 or 8 that has
the weak signal performance of its generation. Streets ahead of the old
Trimbles , Motorola and Garmins we used to love.
Here I use a passive patch antenna on mine in the shack and it stays
locked.


On Tue, 20 Jul 2021 at 20:34, David G. McGaw <david.g.mcgaw at dartmouth.edu>
wrote:

> I have been using several versions of the UCCM units (Trimble,
> Symmetricom and Samsung) with mostly good results, both bare and
> packaged, as well as having several Thunderbolts.  The one thing that
> the Bodinar unit has which is nice is the synthesizer built in.  The
> Thunderbolts and UCCMs do not have this.  On the other hand, as has been
> said, the Bodinar unit has poor hold-over performance if you lose GPS
> lock, which here in NH amongst the trees and hills can happen fairly
> frequently.  As a result, I use OXCO GPSDOs with an external synthesizer.
>
> David N1HAC
>
> On 7/20/21 1:32 PM, N1BUG wrote:
> > Good question on the Leo Bodnar comparison. That's what I am using now
> > and I am sure it is good enough for my purposes but I really want
> > something I can use with LH and maybe the KO4BB Thunderbolt Monitor. I
> > also inquired about the Thunderbolts and hope there's enough supply
> > that I can grab one. I've been looking for a while but am hesitant on
> > eBay units.
> >
> > Paul N1BUG
> >
> >
> >
> > On 7/20/21 1:11 PM, Bob Darlington wrote:
> >> Same.  He probably got 250+ requests in short order.  I'm curious how
> >> the
> >> Leo Bodnar GPSDOs compare.   I'm considering one of these over a
> >> thunderbolt for field use for ham radio EME work.
> >>
> >> -Bob N3XKB
> >>
> >> On Tue, Jul 20, 2021 at 10:59 AM Wes <wes at triconet.org> wrote:
> >>
> >>> I wrote Tom, at the address he gave, on Saturday with a query.  So
> >>> far, no
> >>> reply.
> >>>
> >>> Wes  N7WS
> >>>
> >>>    On 7/19/2021 4:59 PM, John Miles wrote:
> >>>> If you're looking for a low cost surplus GPSDO, the ones Tom
> >>>> mentioned in
> >>>> his post on Saturday are the ones you want.  Not a Thunderbolt-E,
> >>>> and not
> >>>> something from the China surplus/e-waste market.
> >>>>
> >>>> -- john, KE5FX
> >>>>
> >>> _______________________________________________
> >>> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe
> >>> send
> >>> an email to time-nuts-leave at lists.febo.com
> >>> To unsubscribe, go to and follow the instructions there.
> >> _______________________________________________
> >> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe
> >> send an email to time-nuts-leave at lists.febo.com
> >> To unsubscribe, go to and follow the instructions there.
> >>
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe
> > send an email to time-nuts-leave at lists.febo.com
> > To unsubscribe, go to and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe send
> an email to time-nuts-leave at lists.febo.com
> To unsubscribe, go to and follow the instructions there.

-- 
Andy (out keeping fit)