http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/36903/1/01-2617.pdf
among other things illustrates a modified approach to the offset generator by
replacing the intermediate phase locked VCXO with a bandpass filter.
Bruce
On Thursday, October 16, 2014 1:03 PM, Bert Kehren via time-nuts
Hi
I wonder what they are using for the “lpf / zero crossers” in that version.
Bob
On Oct 16, 2014, at 4:07 AM, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/36903/1/01-2617.pdf
among other things illustrates a modified approach to the
On 10/16/14, 3:59 AM, Bob Camp wrote:
Hi
I wonder what they are using for the “lpf / zero crossers” in that version.
Aren't those the usual limiter chain? Described in earlier papers by the
same folks. There was a lot of discussion about this architecture on
the list a few years ago.
Am 16.10.2014 um 02:02 schrieb Bert Kehren via time-nuts:
Take a look at Potato chips yes Potato I have used them with good results
Bert Kehren
330551715157
They don't impress me much. Yes, they can drive my 0.6pF active probes
without a
problem, but connecting just one of their own
Hi
I guess I should have been a bit more specific.
The latest paper is from about 10 years after their papers on limiters. I
wonder if they have any “new stuff” in the limiter part of the new(er) system.
I also wonder if there’s been any progress in the 8 years since the latest
paper.
Bob
Hi
Well, been there / done that in this case. The 100EP noise floor is nothing
exciting. It’s 1/F corner isn’t very impressive either.
Bob
On Oct 16, 2014, at 12:23 PM, Gerhard Hoffmann dk...@arcor.de wrote:
Am 16.10.2014 um 02:02 schrieb Bert Kehren via time-nuts:
Take a look at Potato
I'm looking for effective coaxial lightning arrestors for my GPSDO antennas.
I've seen several types; those completely enclosed in a one-piece metal
enclosure (no replaceable components) and those having a replaceable gas
discharge tube seem to predominate the list.
I'm looking closely at the
Hi
There are a number of them on the auction sites. They are fairly specific in
terms of frequency band and application.
Bob
On Oct 16, 2014, at 7:34 PM, Dave M dgmin...@mediacombb.net wrote:
I'm looking for effective coaxial lightning arrestors for my GPSDO antennas.
I've seen several
Lightening arrestors are an important part of a protection system but just
installing some in the antenna cable is not going to help so much. You
need a system approach. If you do it right you can take a direct hit
The big problem with grounding is Ohm's Law. That is if any current flows
in a
Thanks, Chris.
I've done a bit or research on the subject, and think I have a reasonable
grip on the necessary steps. I have an 8' ground rod driven into the ground
directly under the spot where my antennas mount. #6 solid copper from the
rod to a heavy aluminum plate, where the arrestors
On 10/16/14, 6:27 PM, Chris Albertson wrote:
Lightening arrestors are an important part of a protection system but just
installing some in the antenna cable is not going to help so much. You
need a system approach. If you do it right you can take a direct hit
The big problem with grounding is
Years ago, I visited an installation that used a large triggered spark
gap to discharge a large bank of caps at 100 KV into the primary of an
air wound (about 8 feet in diameter) 1:10 step up pulse transformer
connected to two aluminum plates about 30 feet square separated by
several feet of water
Of all device types, I think gas tubes are the best for this sort of
application - very low C, and high surge current rating. I'm
picturing the kind that are used in power supplies and such for
limiting line transients - about 1 cm dia and length with axial
leads. I don't know what kind are
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