Re: Re: Jocko Clock/Square Wave
Well... right now I've just finished an El Cheapo phono pre and I'm listening to Pat Metheny on vinyl.😎
Let's say it has a perfect round wave.😀
I can't stop listening.
Peter, I think this is one of those nights I'll stay up listening to music.🙂
It's compulsive.
Sorry... off-topic... Portuguese humour.😀
Elso Kwak said:
Well... right now I've just finished an El Cheapo phono pre and I'm listening to Pat Metheny on vinyl.😎
Let's say it has a perfect round wave.😀
I can't stop listening.
Peter, I think this is one of those nights I'll stay up listening to music.🙂
It's compulsive.
Sorry... off-topic... Portuguese humour.😀
I think Lars' clock is pretty easy to understand but you have to isolate the different parts in order to see what he has done.till said:
Till, why don't you try to put something together by yourself?
Re: Diy
I don't think any professional will agree on that making a top of line oscillator is a piece of cake.
The schematics in some cases is 25% of the design, the pcb layout is the rest 75%. "not too difficult" is an understatement.Elso Kwak said:
I don't think any professional will agree on that making a top of line oscillator is a piece of cake.
The Final Solution
🙁
Thinking you can fly off the top of the Okura Hotel or was it Hilton and coming down rather hard leaving his daughter in tears you are considering a final "solution"?till said:
🙁
peranders I agree with you totally. PCB design for clock is a major factor.
I would be very much interested about comments from Guido T, Lars, Jocko and Elso about their exeriences with the PCB layout of their respective clocks.
*How many different PCB versions before the final one (hope you don't consider this info a secret)?
*How big was the measureable/hearable difference with the best and worst layout etc?
I suppose any good such product takes at least 2 or 3 layouts before deciding on the best. For me an argument that a development of a product took 6 PCB versions and hundred hours of listening etc to be a major sign of real worked out design.
Ergo
I would be very much interested about comments from Guido T, Lars, Jocko and Elso about their exeriences with the PCB layout of their respective clocks.
*How many different PCB versions before the final one (hope you don't consider this info a secret)?
*How big was the measureable/hearable difference with the best and worst layout etc?
I suppose any good such product takes at least 2 or 3 layouts before deciding on the best. For me an argument that a development of a product took 6 PCB versions and hundred hours of listening etc to be a major sign of real worked out design.
Ergo
I never listened to different layouts. Each version was different, so the layout was also different.
I didn't listen to them, either.
Seriously...........
Yeah, I measured some stuff...just to see if what I thought would happen did.
Jocko
I didn't listen to them, either.
Seriously...........
Yeah, I measured some stuff...just to see if what I thought would happen did.
Jocko
I actually blew orange juice out my nose laughing. It stings.
"The schematics in some cases is 25% of the design, the pcb layout is the rest 75%."
............ and usually 100% of someone else's work around here.
"I would be very much interested about comments from Guido T, Lars, Jocko and Elso about their exeriences with the PCB layout of their respective clocks."
Not as interested as P-A I'll bet..........
"Till, why don't you try to put something together by yourself?"
I bow to P-A as the new holder of the ironic humor award. I don't think I could come close to an over the top statement like that!
"The schematics in some cases is 25% of the design, the pcb layout is the rest 75%."
............ and usually 100% of someone else's work around here.
"I would be very much interested about comments from Guido T, Lars, Jocko and Elso about their exeriences with the PCB layout of their respective clocks."
Not as interested as P-A I'll bet..........
"Till, why don't you try to put something together by yourself?"
I bow to P-A as the new holder of the ironic humor award. I don't think I could come close to an over the top statement like that!
Fred you may like to play jokes on me like on everyone else, i have no problem with that. I did put together something until now, but no clock circuit. There is a reason: i´m not convinced it has any purpose to mess around with the clock. As long as it is not measured whats is better on the messed up clock i see great chance everything gets worse and not better.
It was Jocko! Your Majesty.......
I was aiming at Per but I guess he ducked. He did deny doing something that I never acussed him of (it was someone else and he didn't hear about it at the time I guess)
Measure clock jitter till you drop if you like. The last time I made any meaningful measurements of clock jitter it took about $70,000 dollars of test equipment at my late telecom gig.
There is only one thing worse than being talked about, and that's not being talked about.
I was aiming at Per but I guess he ducked. He did deny doing something that I never acussed him of (it was someone else and he didn't hear about it at the time I guess)
Measure clock jitter till you drop if you like. The last time I made any meaningful measurements of clock jitter it took about $70,000 dollars of test equipment at my late telecom gig.
There is only one thing worse than being talked about, and that's not being talked about.
Analysis
Hi Till,
You want an analysis of Lars' circuit?😕
At first sight it looks complicated but it is extremely simple to analyse.😎
till said:
Hi Till,
You want an analysis of Lars' circuit?😕
At first sight it looks complicated but it is extremely simple to analyse.😎
Hello
Interesting clock schematic.
About the LClock 2 / C2 schematics.
In that schematic it use a 74AC02, can I replace it by a MC74F02 ?
It have quite same propagation delay specs.
The BFR92A transistors in this schematic are a 5 ghz type, can I use a much lower frequency transistor, any transistors you can suggest ?
Thank
Bye
Gaetan
Interesting clock schematic.
About the LClock 2 / C2 schematics.
In that schematic it use a 74AC02, can I replace it by a MC74F02 ?
It have quite same propagation delay specs.
The BFR92A transistors in this schematic are a 5 ghz type, can I use a much lower frequency transistor, any transistors you can suggest ?
Thank
Bye
Gaetan
Hi Gaetan
Sorry i didn't see this thread before.
You should use a 74AC type, as the F type would load the oscillator too much on it's input. Today we have even better types, like the NC7SZ02, a single gate type with very short connection from power pins to the chip.
Hello
I can't have the 74AC type, but I have the 74VHC04, can I use this one ?
Thank
Bye
Gaetan
Hi
I cannot comment on the specific use in LClock, as i do not have the schematics for it anymore. However the 74VHC does not appear to be a very good option for a clock buffer in general, it's too slow, and you might as well use a standard HC.
I cannot comment on the specific use in LClock, as i do not have the schematics for it anymore. However the 74VHC does not appear to be a very good option for a clock buffer in general, it's too slow, and you might as well use a standard HC.
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