My experience is different. When I received a broken item from China, it
was damaged in shipment because it was poorly packed, the seller told be to
keep the broken part because he did not want to pay to ship something he
would just toss in the trash.
eBay's current policy is given here:
http://p
Hi
The EEVB guys have been going around on these GPSDO’s for about a year
now. Lots of people have tried to get refunds on them. Pretty much every trick
in the
book (replacement is in the mail …. need one more piece of information from you
…
shipping clerk in the hospital with bubonic plague …)
No, my experience with Chinese sellers, even when you file a "not as
described" case, is that eBay will require you to return the item at your
own expense if the seller has stated they will not pay return shipping.
Ebay's attitude was that the seller could just state in their item
description
I don't think there is a way to control the loop parameters except maybe some
PFORTH commands. The Trimble units can be put into holdover via software.
The Symmetricom units require you to disconnect the antenna (or possibly use a
SCPI command to manually set the DAC voltage... Lady Heather
Mark wrote:
Charles,
You are confusing these units with those made by that ham in China (can't remember his
callsign, begins with a "B"). The guts of these boxes is a telco GPDDO board
made by either Trimble or Symmetricom (you can tell because of the 6.0V power
requirement).And that r
Michael wrote:
I think what the seller saying is that the counter was externally
referenced to the Thunderbolt for the frequency measurements
that they state.
Yes, on re-reading the listing, I believe you are right. Thanks!
Charles
___
time-nuts
On Sat, Jul 9, 2016 at 5:51 PM, Richard W. Solomon
wrote:
> What a deal, if it arrives DOA, return shipment is on
> your nickel. I would look elsewhere.
That is not true. If it were DOA and the seller would not take it back
post paid you could file a "not as described" on the seller and eBay w
All the affordable GPSDOs out there are surplus telecom devices...
Thunderbolts, Z38xx's, NTP, etc. They were built to rigorous telco
standards and can be excellent performers. Just because they are surplus, does
not make them junk.
The latest round of surplus GPSDOs to hit the mar
To paraphrase a few other folks, taking on the task of building your own, even
using the VE2ZAZ board as a basis is a very educational experience. It will
teach you an enormous amount. There are lessons in control systems, phase and
frequency locked loops, oven controllers, phase and frequency
ossible!) is what's important.
Bob
-
AE6RV.com
GFS GPSDO list:
groups.yahoo.com/neo/groups/GFS-GPSDOs/info
From: Dimitri.p
To: Discussion of precise time and frequency measurement ;
time-nuts@febo.com
Sent: Saturday, July 9, 201
Richard wrote:
This looks like a good beginner's GPSDO on eBay: 172148560746
"This is GPS Disciplined Clock made with trimble GPSDO Board.Full tested
by Agilent 53132A with US-012 option and Ex-ref from trimble thunderbolt
GPSDO."
The seller says it has a sine wave output and is accurate
since you asked ...
Many thoughts, none of them good.
Recycled components sold for real money.
Too many "versions" to figure out "what you got".
If all you want is a frequency standard to turn it on and "forget it"
spend a few extra bucks and get one with all new components from a
domestic compa
Charles,
You are confusing these units with those made by that ham in China (can't
remember his callsign, begins with a "B"). The guts of these boxes is a telco
GPDDO board made by either Trimble or Symmetricom (you can tell because of the
6.0V power requirement).And that reference to a T
"Full tested by Agilent 53132A with US-012 option and Ex-ref from
trimble thunderbolt
GPSDO."
I think what the seller saying is that the counter was externally
referenced to the Thunderbolt for the frequency measurements that they
state.
Cheers
Michael
On Sun, Jul 10, 2016 at 10:58 AM, Charles S
What a deal, if it arrives DOA, return shipment is on
your nickel. I would look elsewhere.
73, Dick, W1KSZ
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Richard Mogford
Sent: Saturday, July 09, 2016 4:40 PM
To: time-nuts@febo.com
Subject: [time-nuts
They are based upon a telco surplus "UCCM" GPSDO board. Both Symmetricom and
Trimble made (mostly) compatible units. I prefer the Trimble units... they
store their settings in EEPROM. The Symmetricom units don't... and have to do
a long re-survey every time you power them up. Plus the fir
This looks like a good beginner's GPSDO on eBay: 172148560746
"This is GPS Disciplined Clock made with trimble GPSDO Board.Full tested
by Agilent 53132A with US-012 option and Ex-ref from trimble thunderbolt
GPSDO."
The seller says it has a sine wave output and is accurate from
10e
with the mfg. numbers as I mentioned
you will find them a lot cheaper if you want to roll out your own.
-=Bryan=-
> From: rch...@earthlink.net
> Date: Sat, 2 Jul 2016 21:28:12 -0700
> To: time-nuts@febo.com
> Subject: [time-nuts] Good GPSDO?
>
> I am just getting into the pre
I am just getting into the precise time and frequency stuff. I thought I
should buy a GPSDO.
There are quite a few similar-looking ones on eBay, such as eBay number
281802105734
There is also a Trimble at 252162780444
Would either of these be OK for a newbie like me?
Richard
__
I am just getting into the precise time and frequency stuff. I thought I
should buy a GPSDO.
There are quite a few similar-looking ones on eBay, such as eBay number
281802105734
There is also a Trimble at 252162780444
Would either of these be OK for a newbie like me?
Richard
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