Re: Introductions
Hi all
I'm a current grad student Mechanical Engineering at USU. I got my Technician's license back in high school and have started getting into radio experimentation in the last couple years. I
By
Cory KG7BBV
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#61
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Re: Intriguing PCB holder
I have that model myself. I didn't buy it from Amazon, so it was cheaper
buying directly from a foriegn seller. I do most soldering with the board
tilted, or vertical. I also have a couple Panavise
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Michael A. Terrell
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#60
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Re: Intriguing PCB holder
Yes, I have that one.
By
Steve J. Noll, WA6EJO
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#59
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Re: Intriguing PCB holder
Oh yeah Steve, That is nice and so is the price. Do yo have that?
--
73/72 . .
Bob de k2ki
k2ki@...
k2ki.bb@... (Goes to my cell)
NEQRP #911
4SQRP #2292
FP #4214
SKCC #12195
NAQCC
By
Bob - K2KI
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#58
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Re: Intriguing PCB holder
I like this one more: < B00Q2TTQEE >. Easy to flip to either side or hold at an angle.
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Steve J. Noll, WA6EJO
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#57
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Intriguing PCB holder
Hi all,
I was doing some window shopping at Amazon and came across
By
Bob - K2KI
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#56
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Re: Crystals
I don't have time right now to delve into these, but I am ecstatic over having a conversation where someone else provided literature citations. So I shall be getting them and reading them.
Have
By
Reginald Beardsley
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#55
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Re: Crystals
The literature on low noise oscillators is vast and the current state of the art can be a bit exotic. I can¡¯t do cryogenic sapphire resonators! My foray into low noise oscillators was driven b y my
By
Dennis Sweeney WA4LPR
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#54
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Re: Crystals
Very good presentation, indeed, Dennis! Thanks.
With respect to the Clapp oscillator. Please refer to the drawing attached. It is a very simple design but appears to be working very good. I also made
By
Harke Smits
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#53
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Re: Crystals
The problem of doing it all in the analog domain is maintaining phase quadrature. First in the oscillators and then in the filters. You may be able to do it over a very narrow bandwidth, but not over
By
Mike Feher
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#52
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Re: Crystals
Dennis,
That is a fantastic presentation! Thank you!
When I looked at Andrew Holme's design, my first thought was to do as much of the signal processing in the analog domain as possible. Dynamic
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Reginald Beardsley
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#51
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Re: Crystals
Phase noise seems to be one of those topics of interest but measuring it can be a challenge. I dug into this a couple of couple of years ago with the idea of designing low noise microwave LO¡¯s.
By
Dennis Sweeney WA4LPR
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#50
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Re: Crystals
Would you please post details about the Clapp oscillator and the measuring setup?
Thanks,
Reg
By
Reginald Beardsley
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#49
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Re: Crystals
On Wed, Nov 25, 2020 at 05:16 PM, Reginald Beardsley wrote:
>
> ROFL!!!!!!!!!!!!!!!!!!!!!!!!!!
>
> I just sent this link to a friend:
>
> http://www.aholme.co.uk/PhaseNoise/Main.htm
>
> and the
By
Harke Smits
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#48
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Re: Crystals
ROFL!!!!!!!!!!!!!!!!!!!!!!!!!!
I just sent this link to a friend:
http://www.aholme.co.uk/PhaseNoise/Main.htm
and the next thing I see is this message.
Have Fun!
Reg
By
Reginald Beardsley
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#47
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Re: Crystals
Digikey has 14.000 MHz crystals in stock for $1.41
https://www.digikey.com/en/products/detail/cts-frequency-controls/406C35B14M00000/604558
<danyperez1@...> wrote:
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Michael A. Terrell
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#46
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Re: Crystals
Dear Harke:
Not everyone has the means to measure phase noise! Could you please share the link from where you built it?
73!
Daniel Perez LW1ECP
25 de noviembre de 2020 12:34:22 ART, Harke Smits via
By
Daniel Ricardo Perez LW1ECP
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#45
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Re: Crystals
Hello Dennis,
Many thanks for your interesting contribution. I am working on a couple of low noise crystal oscillators actually, at 14.0 and 100.0 MHz, and I use crystals of unknown origin at this
By
Harke Smits
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#44
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Re: Direct Sequence Spread spectrum modulation
Bonjour ¨¤ tous
A few Historical notes, please....
Spread Spectrum
The first frequency hopping spread Spectrum invented in 1890s by Nikola Tesla for a remotely controllable boat.
In 1942 famous
By
Froggie the Gremlin
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#43
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Crystals
This is a somewhat long missive on my experience of buying crystals for amateur radio projects. It represents my experience, your experience might be different but I hope this may be of use to some of
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Dennis Sweeney WA4LPR
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#42
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