Author Topic: Is this "Phase IV of Idiot Alert" or "Phase II of.................."  (Read 5351 times)

Gen. Dreedle

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We're Only in It for the Money"?

http://www.ebay.com/itm/Supper-Low-JITTER-Clock-11-2896Mhz-Rubidium-Frequency-/180497234806?pt=US_Radio_Tuners&hash=item2a06793b76

Can't believe 32 people have bought one of these crappy things. And 13 of the 16.xxx MHz version.

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"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Stewie

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #1 on: August 13, 2014, 02:56:02 PM »
These things have gone up in price a lot lately  :(. Also when advertised as frequency standard. They must be running low on stock. I have a 10MHz version (as frequency standard) and that version is not considered low jitter. The adjustable version is even worse. Both use a DDS chip to get to the desired frequency. The 10MHz version is slightly adjustabe.

The last picture is strange, i think all of these things are adjusted by commands to the serial port, not with a pot. Weird.
The pot would be some fine adjusting on the RB physics side and i think they would program it to 11 or 16MHz before shipping.
So i would put a sticker over it with don't touch, instead of pointing to it in te add  :o

And yes, they are only in it for the money  ;)
HA! That's so funny I forgot to laugh... excluding that first Ha.

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #2 on: August 19, 2014, 09:55:23 AM »
For $25 (or maybe a bit more), you can buy a Morion. (Yes, surplus out of China.) I have several. Some are not as quiet as the others, but they are better than that codswallop.
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Stewie

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #3 on: August 19, 2014, 05:08:21 PM »
I know, bought similar stuff from out of China. A Piezo Technik and a nice Trimble, both 10MHz.
HA! That's so funny I forgot to laugh... excluding that first Ha.

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #4 on: August 19, 2014, 09:04:00 PM »
I have a Trimble............paid too much, and the close-in noise stinks. Better noise floor than a Morion, but so what? Useless, for my work.

I keep it warm, just in case............
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

MystereoN

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Is this "Phase 5" ?
« Reply #5 on: September 08, 2014, 05:57:38 AM »
Never argue with a fool,
they will drag you down to their level,
then beat you with their experience!!!

seagreen

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #6 on: September 08, 2014, 11:00:19 AM »
I see a pattern arising.
No double blind testing was used in the making of this post.

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #7 on: September 10, 2014, 07:14:25 AM »
Quote
...............personally I would build two identical clocks and just subtract 3dB from the measured output rather then trying to source a state of the art reference source.

That only works if they truly are identical. Well, that is what you should expect from someone who has never built 2 identical clocks. Especially 2 that are good enough to get the results the guy with the big nose gets.

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"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #8 on: September 10, 2014, 07:20:44 AM »
I found Phase 5!!!!!!!!!!!!!!!!!!

http://www.diyaudio.com/forums/digital-line-level/234839-low-jitter-crystal-oscillator-ic-beta-tester-needed.html

Look at the 1 Hz numbers!!!!!!!!!!!!!!!!!!!!!!! Horrible.

Maybe I should offer my consulting services.

So, your link is really Phase 6, since that goofy post is over a year old.

Not that anyone is really keeping track.............

BTW, are you going to stir the pot, and remind them how stupid I think they are? Just curious.

(BTW, it didn't cost $30k.............it used to cost $5k, now $10k+.)
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #9 on: September 15, 2014, 10:32:50 PM »
Quote
I did ask Croven for a quote (5 pieces), but I got any reply from them.
I'm not sure they would supply such little quantity.

Will someone please put this idiot out of his misery?

And some of you guys still wonder why I hate hobbyists....................

IDIOT!
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #10 on: September 15, 2014, 10:35:17 PM »
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I have seen this claim but nothing that can support it.

I thought that this guy is supposed to be some sort of design guru.

Well, he probably is. This time he is just plain wrong.
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #11 on: September 15, 2014, 10:38:33 PM »
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This thread also indirectly answers one of my questions, which is : what is the added jitter of a HC logic gate ? From the tests, it seems negligible. Good news !

You could ask someone who knows, instead of some idiot hobbyist. But, I digress.
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #12 on: September 15, 2014, 10:39:54 PM »
Quote
Well I learn than jitter & phase noise are the same with crystals. I also read than TCXO are not as good that it seems for audio... I also read than the ppm stability is not so important, btw some manufacter provide already more stabilised Crystal than they get artificialy older with heating !


Zzzzzzzzzzzzzzzzzz..............................
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #13 on: September 15, 2014, 10:41:10 PM »
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If I look at the famous Crystek, i see than at 500 hz, the noise floor is -140 db ! Is it an usefull data or is it just the phase noise F and h2,h3... level which are important.

NO, IT IS NOT IMPORTANT!
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"

Gen. Dreedle

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Re: Is this "Phase IV of Idiot Alert" or "Phase II of.................."
« Reply #14 on: September 15, 2014, 10:43:29 PM »
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i think this is a really interesting circuit: Low Phase Noise Design: Crystal Oscillators it uses the crystal as a bandpass filter as well as the oscillator to reduce the phase noise. There are a number of tricks worth studying.

"Been there, done that"..........................long time ago. I first saw that circuit in the 70s. Sounds like a good idea.................

Sounds like a good idea is all it is. Trust me.
"Major Danby, sir."
"Danby. D-A-N-B-Y."
"Take him out and shoot him."
"Sir?"
"I said take him out and shoot him. Can't you hear?"