[time-nuts] Fwd: Price of LTE Lite GPSDO vs Trimble Thunderbolt.

SAIDJACK at aol.com SAIDJACK at aol.com
Fri Oct 17 22:23:03 EDT 2014


Bob,
 
"Depending on surplus gear in a commercial system would be silly compared  
to using newly manufactured parts."
 
You nailed it Bob, we wouldn't compare an old 2004 Porsche Cayenne one  can 
now get for $5K with a new Tata car costing $6K either..
 
Both get you there for almost the same price even though the Porsche is  
about 20x more expensive new, but you can't and shouldn't compare the  
performance of the two. They were designed for two completely different  
applications, and there is a reason why the Porsche (Thunderbolt) new is  
significantly more expensive - it has significantly higher performance.
 
Its a silly comparison.
 
bye,
Said




Reply-To: Discussion of precise time and frequency measurement  
<_time-nuts at febo.com_ (mailto:time-nuts at febo.com) >




Hi

The question on all of these  setups is very much - what do you need?

The  T-Bolt was designed to meet some very specific requirements. It’s got 
an  OCXO onboard because of that. 

A 48 hour  battery backed Rb does something very different, it’s got 
different costs  associated with it. 

A modern / up to date  TCXO based unit makes some compromises to trade off 
against power and  size.

Depending on what your system needs  are, each of the first two may 
uniquely fill a bill that the others will not  and can not. If you need to run 120 
days on battery, the third will win the  contest easily. If you want to run 
on something other than GPS, number 3 is  your choice. 

Cost wise, it all depends on  when you bought what. I have Rb’s that cost 
less than $40 and T-Bolts that  cost less than $100. You can still get 
surplus T-Bolt like objects (OCXO  based surplus GPSDO’s) for under $130. I also 
have some stuff I’ve bought on  eBay (and other surplus outlets) over the 
years that turned out to be less  than perfect. Depending on surplus gear in a 
commercial system would be  silly compared to using newly manufactured 
parts. It all depends on what you  need.

Bob


On Oct 17, 2014, at 5:19 PM, paul swed  <_paulswedb at gmail.com_ 
(mailto:paulswedb at gmail.com) >  wrote:





Don't want to hijack any discussion and am  looking forward to the ebay site


and ordering. Whats amazing is the power  spec in addition to other specs. I


rechecked the spec 1/16th watt at 3.3V. My  RB in the basement draws 24


watts just idling along and keeping two  hefty SLA batteries charged for a


48 hour run time if  needed.





I can clearly see the case of careful  support system design such that a


battery set can be charged and even in a  power failure run several days on


a small battery.


SLA 7 amp was something like 100 plus hours.  Bert introduced me to some of


the Lithium battery technologies that can be  had for reasonable cost and


are small and dense.





But that said really no need for a battery  since restarts are fast...


Lots to think about. Like LEDs drawing more  power then the system and


sloppy base power supplies wasting  power.


Regards


Paul


WB8TSL





On Fri, Oct 17, 2014 at 4:53 PM, Pete  Lancashire 
<_pete at petelancashire.com_ (mailto:pete at petelancashire.com) >


wrote:






Sorry to create any  misunderstanding









I was saying thanks to TVB/TAPR for all  their effort, and Said/JLT for




doing what they did for the  group









I was in no way comparing the used  Thunderbolts to the LTE Lite.









-pete









On Fri, Oct 17, 2014 at 1:13 PM, Jim  Sanford <_wb4gcs at wb4gcs.org_ 
(mailto:wb4gcs at wb4gcs.org) >  wrote:










And, somehow I expect that my LTE-LITE  will actually work, which  my






thunderbolt never did.  (Very  noisy)  It continues to collect  dust....






On 10/17/2014 3:49 PM, Pete Lancashire  wrote:














First three cheers to LTE for making  these  available.

















It reminds me when Motorola made a  developers kit for the  then








new 68HC11 MCU available for  $68.11.

















I know of one design win they got that  more then made of their  marketing








costs.

















Another that hit me is with inflation  the LTE Lite is not much more  then








what many of us paid for our  Thunderbolts.

















For those new to the list  ...

















https://www.febo.com/pipermail/time-nuts/2008-May/031100.html

















http://www.leapsecond.com/pages/tapr-tbolt/

















In 2008, $124, the LTE Lite in 2014  $195.

















With 'real' inflation (not the 11% you  get online) the $71 difference  is








not much  more.

















My two backup Thunderbolts cost me  $145 each, just before they hit  $200








then became  history.

















Again thanks to Said and JLT  !!!!

















-pete








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