Well, it is nothing but his personal recollection of the events, so that
is expected. It represents one voice of several. Better have that on
record than it being lost. But it is not the complete story. That would
have to be collected over a much larger set of people.
BTW. Ref 44 in this paper is one of Edson's articles.
I've read Chapter 15 of Edson's book, and it provides a model, but fail
to include flicker noise, which is in Leesons model. It is a
straight-forward extension thought. I don't have access to any of his
articles, except the one-page letter that Rick linked.
There is surely more work to be done to build a more comprehensive
detail of events, show where ideas came up, was re-invented,
incorporated and extended. Edson clearly contributed.
Cheers,
Magnus
On 08/07/2016 06:32 PM, KA2WEU--- via time-nuts wrote:
Here is another comment ;
this paper is too self-centered for it to be the reliable historical
report which we would like.
It seems that Edson did some great work before,
73 de Ulrich , and I agree with the statement
http://www.tubebooks.org/Books/vto.pdf
Vacuum tube oscillators
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In a message dated 8/6/2016 9:02:43 A.M. Eastern Daylight Time,
[email protected] writes:
Good morning,
yes I saw the reference but he did not point out what it was or
function,
This paper is more about people and events and very little since .......
Ulrich
In a message dated 8/6/2016 2:26:54 A.M. Eastern Daylight Time,
[email protected] writes:
On Sat, Aug 6, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<[email protected]> wrote:
Leeson produced a somewhat random selection of papers , omitting
important
things like the sapphire based best in the word . This was not even
referenced .
The reference [145] at the end of the sentence that mentions sapphire
oscillators also discusses a hybrid photonic-microwave oscillator that
incorporates a room-temperature sapphire oscillator so I think he
tried to cover both subjects with that single reference.
The paper has a misleading title. It suggests that it is a history of
the last 50 years, when it is about events roughly 50 years ago. The
abstract makes this clear though. So I didn't really expect to read
much about developments past 1970.
Cheers
Michael
On Sat, Aug 6, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<[email protected]> wrote:
Some of the cited references are poor, modern non-linear mathematic is
kind
of omitted . After all the oscillator phase noise speculation, I would
have really liked to see at last a reference about the most modern
measurements techniques and it validation. How do you calibrate a
phase
noise test
system.
Leeson produced a somewhat random selection of papers , omitting
important
things like the sapphire based best in the word . This was not even
referenced .
I think he is really out of it .
73 de N1UL
In a message dated 8/5/2016 7:11:18 P.M. Eastern Daylight Time,
[email protected] writes:
Very selected and incomplete references and the equally important
question
of measurements strangely not covered
73 de N 1 UL
I suppose he could write an equally-lengthy article on measurements
alone,
but leaving out the post-1970s history entirely was a little
disappointing. It was strange to hit "ctrl-f Rohde" and see only one
reference in the
bibliography. Same for "Hewlett." "Rubiola" brings up one hit (but no
citations) and "Stein" brings up none at all.
-- john, KE5FX
Miles Design LLC
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