Hi Ken,
This is correct. Some other documents explain the rationale. Basically for long
runs the loss caused by the mismatch is less than the higher loss per foot of
50R coax of a similar size. Even better than RG59 is the high performance cable
used for cable TV and satellite installations.
kenkub...@hotmail.com said:
Hi Time-Nuts guys, I was reading the Trimble Thunderbolt manual section
2.1.3 (Antenna Cable). Trimble recommends using RG-59 cable which is 75 ohm
coax. Is this a typo or is this correct? I thought that the Trimble
Thunderbolt would use a 50 ohm cable and
David wrote:
On Mon, 30 Apr 2012 06:51:37 +1200, Bruce Griffiths
bruce.griffi...@xtra.co.nz wrote:
The circuit for the Tek 2440 is in the manual.
However, it isnt that well executed.
I like using the 2440 as an example because the design and theory are
readily available online.
On Sun, 29 Apr 2012 13:19:08 -0700
ed breya e...@telight.com wrote:
If the Rb cell drifted enough (maybe if it was filled with water)
to de-tune the mechanical cavity resonator, it wouldn't work at all.
Only a small amount of the RF power in the cavity is coupled into the
Rb gas. The
Hi Ken,
Hi Time-Nuts guys, I was reading the Trimble Thunderbolt manual section
2.1.3 (Antenna Cable). Trimble recommends using RG-59 cable which is 75
ohm coax. Is this a typo or is this correct? I thought that the Trimble
Thunderbolt would use a 50 ohm cable and antenna.
Thankyou
On 04/30/2012 10:32 AM, Attila Kinali wrote:
On Sun, 29 Apr 2012 13:19:08 -0700
ed breyae...@telight.com wrote:
If the Rb cell drifted enough (maybe if it was filled with water)
to de-tune the mechanical cavity resonator, it wouldn't work at all.
Only a small amount of the RF power in the
Hi
Low noise receiver inputs are often mismatched to optimize noise figure.
Receiving antennas may / may not be well matched to a given impedance. That all
makes the mismatch loss a bit of a random thing. Some of the early Trimble docs
mention that they saw essentially no mismatch loss when
Did download the manual and a good read.
Thanks
On Mon, Apr 30, 2012 at 12:12 AM, Don Latham d...@montana.com wrote:
A first-class engineered unit will have a single point where the chassis
and circuit grounds tie together, Sometimes it's a panel, where the i/o
connectors are coaxial. I've
Its all been said above. Now I use zero loss ;-) 1/2 catv hardline 2 Ghz
stuff.
Regards
Paul
On Mon, Apr 30, 2012 at 7:33 AM, Bob Camp li...@rtty.us wrote:
Hi
Low noise receiver inputs are often mismatched to optimize noise figure.
Receiving antennas may / may not be well matched to a given
Hi the Gang,
I just got not cheap but for a quite reasonnable price a legacy Fluke
PM6680B counter.
This toy seems to be very interesting to play with, I already have a
5370B but this new toy I got seems to be more fancy to play with, have
to be confirmed.
I know there is a software from
As it is not clear to me that Robert has received my emails, I am sending this
via the list. My apologies for the bandwidth :/
Robert,
Yes I have the Tektronix 7T11 to 7T11A conversion kits available, and you may
pay using Paypal to this email.
Please acknowledge
Thanks
David Partridge
Hi,
Hi the Gang,
I just got not cheap but for a quite reasonnable price a legacy Fluke
PM6680B counter.
This toy seems to be very interesting to play with, I already have a
5370B but this new toy I got seems to be more fancy to play with, have
to be confirmed.
I know there is a software
Hi Pierre-Francois
Assuming yours is the Ebay item I think it is, I was wondering who bought
that and see there's another due to finish in a couple of hours or so:-)
The Fluke PM6680B is a rebadged Pendulum CNT-80, Pendulum now being part of
Spectracom.
Both Fluke and Tektronix, and
Hi Björn,
Thank you very much for this information, I'm glad to see that John'
software supports this Fluke PM6680
I'll test it right away.
All the bests and thanks again.
pf, F5BQP
Le 30/04/2012 16:38, b...@lysator.liu.se a écrit :
Hi,
Hi the Gang,
I just got not cheap but for a quite
Hi Pierre-Francois,
On 04/30/2012 04:57 PM, gandal...@aol.com wrote:
Hi Pierre-Francois
Assuming yours is the Ebay item I think it is, I was wondering who bought
that and see there's another due to finish in a couple of hours or so:-)
The Fluke PM6680B is a rebadged Pendulum CNT-80,
My unit has many connections between chassis and circuit grounds, most
of which look intentional. There are connections at the 1 MHz and 100
KHz BNC outputs (the 5 MHz output is transformer coupled). There's also
a connection at an SMC connector from the multiplier to the SRD final
My TrueTime gps rcvr uses rg-59 as well.
Don
Robert Atkinson
Hi Ken,
This is correct. Some other documents explain the rationale. Basically
for long runs the loss caused by the mismatch is less than
the higher loss per foot of 50R coax of a similar size. Even better than
RG59 is the high
t...@leapsecond.com said:
Related to that, are there any seismometer experts on the list? I've always
wondered why they don't augment the extremely sensitive detectors with less
sensitive detectors? Of course a really good detector will overload; so just
co-locate cheap detectors that are 40
Yes, I use the regular satellite TV cable: low loss, easy to find and cheap.
On Mon, Apr 30, 2012 at 8:22 PM, Don Latham d...@montana.com wrote:
My TrueTime gps rcvr uses rg-59 as well.
Don
Robert Atkinson
Hi Ken,
This is correct. Some other documents explain the rationale. Basically
Make sure to buy the quadrouple shielded 75 Ohms RG-6 cable from Home Depot
etc, it's much better than the standard single or double shielded RG-6 and
works wonders for GPS signals, and it's quite inexpensive.
Impedance mismatch loss can be neglected, and long cable runs can be made.
bye,
Hi Hal:
Thanks very much for that link.
I have a sensor on order.
http://www.prc68.com/I/Seismometer.shtml#QCN
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Clarke4Congress.html
Hal Murray wrote:
t...@leapsecond.com said:
Related to that, are there any
With a rather freaky display that I have never seen:
http://www.electricstuff.co.uk/venner.html
___
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To unsubscribe, go to
Reminds me of the IEE projected displays.
On 04/30/12, Mark Simshol...@hotmail.com wrote:
With a rather freaky display that I have never seen:
[1]http://www.electricstuff.co.uk/venner.html
___
time-nuts mailing list --
In message blu125-w7e5a76c835c5c731156ddce...@phx.gbl, Mark Sims writes:
With a rather freaky display that I have never seen:
http://www.electricstuff.co.uk/venner.html
Looks like IEE One Plane Readout, wonderful technology.
I have four such digits as a
Ken,
I believe that the manual also states that RG-59 has lower loss than RG-58,
but I would use RG-6 for even lower loss. Neither the antenna nor the
Thunderbolt cares much about the cable impedance.
73, Eric Lemmon WB6FLY
-Original Message-
From: time-nuts-boun...@febo.com
that is awesome! with Transistorized Binary Unit and up to 1.1
megacycles. wow!
On 2012-04-30 15:05, Mark Sims wrote:
With a rather freaky display that I have never seen:
http://www.electricstuff.co.uk/venner.html
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