TESORO GOLDEN SABRE

[Qiaozhi]

It may be me, but I think all the links are broken due to "age"...... Could you post the actual document here so that it stays? Or is it simply too big?

If I could get hold of a copy from you, I could cut it up into pieces that Geotech will allow to be posted if you wish.....

I could send you my proper email address via the Geotech message service to make that easier if you wish.

Thanks for your help

Regards

Andy

Thanks in advance.

You cannot post a copy here, as the book is copyright.

[Dennis the Mennis]

Another noise field test attempt

Still curious about the noise outside the 'workshop' I packed my things and went with my mobile workshop into the field.
Packed my steel steed, laptop on my neck, backpack on my back , scope on the luggage carrier.









The last time it went not quite right with the measurements , the coils were not potted at that time..
With the now encapsulated coils had to go well.

Took my list of "reminders and not to forget " and checked everything.
Had my precautions taken for the sun:

I'd read about someone who suspected the solar rays of unexpected influences ( Solar Induced Noise.. ? ) .
You never know ....





But as always destiny struck again:

The USB Scope runs on a virtual machine on my laptop and the USB scope did not want to be recognized
I have installed the scope software to a free partition now , this will not happen again.

When the scope was finally recognized and booted, I had time for a sample before the laptop battery was empty ...

In this example spectrum analyzer view at the outputs of the LM308 ( in this case TL081 )
Steep filter 0 - 50 Hz



View at same test points , still suspicious about the wind effecting the leads in the pcb housing causing a little more noise (?) ....





Added on my list: charge laptop battery even more ....

Finally there was a positive thing: I had the chance to perform a 'wet grass' test ....





Mmmmmmmhhhh maybe next time

To be continued

Kind regards ,

Dennis the Mennis

[simonbaker]

Still curious about the noise outside the 'workshop' I packed my things and went with my mobile workshop into the field.
Packed my steel steed, laptop on my neck, backpack on my back , scope on the luggage carrier.


[ATTACH]17271[/ATTACH]


[ATTACH]17272[/ATTACH]



The last time it went not quite right with the measurements , the coils were not potted at that time..
With the now encapsulated coils had to go well.

Took my list of "reminders and not to forget " and checked everything.
Had my precautions taken for the sun:

I'd read about someone who suspected the solar rays of unexpected influences ( Solar Induced Noise.. ? ) .
You never know ....

[ATTACH]17275[/ATTACH]



But as always destiny struck again:

The USB Scope runs on a virtual machine on my laptop and the USB scope did not want to be recognized
I have installed the scope software to a free partition now , this will not happen again.

When the scope was finally recognized and booted, I had time for a sample before the laptop battery was empty ...

In this example spectrum analyzer view at the outputs of the LM308 ( in this case TL081 )
Steep filter 0 - 50 Hz

[ATTACH]17276[/ATTACH]

View at same test points , still suspicious about the wind effecting the leads in the pcb housing causing a little more noise (?) ....

[ATTACH]17277[/ATTACH]



Added on my list: charge laptop battery even more ....

Finally there was a positive thing: I had the chance to perform a 'wet grass' test ....


[ATTACH]17273[/ATTACH]


Mmmmmmmhhhh maybe next time

To be continued

Kind regards ,

Dennis the Mennis

That is a hoot! It just kept getting funnier! Made my day...

And a good idea too, I hope you try again -- and watch out for those metal bolts in the table.

You did get some data -- how does the noise compare to in your workshop?

Keep up the good work.

-SB

[satdaveuk]

Thats what you call field testing at its best, let us know results

Many thanks

[francisco2006]

problem with noise

hello I'm new here and I have never ridden any PCB been following the scheme Ivconic (COMPLETE TGSL 3.0). Completes the Tesoro Golden Sabre Light, but I have a problem with noise, would have made the wrong reel? And I can not tune the coils. The PCB out of the TX and RX 7.63 V 1.86 V out after sending pictures of everything. thank you

[golfnut]

Hi , please be aware that Pc's laptops , Tvs , LCD tvs, all boom out electrical noise.

You could be measuring the noise your test kit is producing..


I work on stuff like this and its difficult to eradicate.. not impossible. !

S

My IGSL does not function with my 32" LCD tv on in the same room.

[Jerry]

Hi , please be aware that Pc's laptops , Tvs , LCD tvs, all boom out electrical noise.

You could be measuring the noise your test kit is producing..


I work on stuff like this and its difficult to eradicate.. not impossible. !

S

My IGSL does not function with my 32" LCD tv on in the same room.

I agree completely! I am fortunate enough to have a workshop that is 250 away from the house and there is not another house within a quarter mile. So I have a very quite location for testing purposes. Power transformers and converters for RV's are also bad offenders.

A couple years ago when this was a topic of much discussion, I was working on making up a dummy coil circuit that would provide all of the parameters needed for the detector circuit to run properly without having to hook up a coil and also get all the noise.

This could be a great piece of test equipment, Maybe I should take another look at that project.

Jerry

[simonbaker]

I agree completely! I am fortunate enough to have a workshop that is 250 away from the house and there is not another house within a quarter mile. So I have a very quite location for testing purposes. Power transformers and converters for RV's are also bad offenders.

A couple years ago when this was a topic of much discussion, I was working on making up a dummy coil circuit that would provide all of the parameters needed for the detector circuit to run properly without having to hook up a coil and also get all the noise.

This could be a great piece of test equipment, Maybe I should take another look at that project.

Jerry

Yes, a couple of 6mH, 6.5mH chokes would be handy for sure. I've got a 5.6mH inductor which is OK in a pinch. I think a lot of the questions about not getting 30 cm depth could be ambient noise.

-SB

[eduardo1979]

http://www.youtube.com/watch?v=5nJKw...eature=related

[simonbaker]

http://www.youtube.com/watch?v=5nJKw...eature=related

What is on the solderless breadboard?

-SB

[Jerry]

Yes, a couple of 6mH, 6.5mH chokes would be handy for sure. I've got a 5.6mH inductor which is OK in a pinch. I think a lot of the questions about not getting 30 cm depth could be ambient noise.

-SB

Hi Simon:

Last year I made up a couple variable loopstick coils and even made little brass shields for them but then something else intervened and I got away from the project and have not picked it up again.

Here are the two coils I made. As you can see they are tunable. I was sort of making it up as I went on this so any suggestions would be helpful. I was trying for something similar to hooking up a dummy load or signal generator for a two way radio.

Jerry

[simonbaker]

Hi Simon:

Last year I made up a couple variable loopstick coils and even made little brass shields for them but then something else intervened and I got away from the project and have not picked it up again.

Here are the two coils I made. As you can see they are tunable. I was sort of making it up as I went on this so any suggestions would be helpful. I was trying for something similar to hooking up a dummy load or signal generator for a two way radio.

Jerry

Those look great. Basically they can be very helpful when trying to understand where noise comes from, whether it is oscillator jitter, RX pickup, etc. The problem may be getting the resistance realistic, ideally around 20 to 25 ohms would be good for comparing to real coils.

I am thinking also of making tiny circular coils that you can null in the normal way for ease of use and comparison to full size coils.

-SB

[Jerry]

Those look great. Basically they can be very helpful when trying to understand where noise comes from, whether it is oscillator jitter, RX pickup, etc. The problem may be getting the resistance realistic, ideally around 20 to 25 ohms would be good for comparing to real coils.

I am thinking also of making tiny circular coils that you can null in the normal way for ease of use and comparison to full size coils.

-SB

At the moment, I forget the actual resistance values, but as I recall they are fairly close to what we are looking for. I have the circuit for it pretty well worked out in my head. I got as far as a quick test on being able to null these two coils and that works good. My idea for the circuit is switching in a series RC circuit to shift the phase by a settable amount with forward biasing a diode. Used to do this with RTTY in amateur radio years ago.

You get the idea, just a means to test a TGSL/IGSL board without the coil because the coil introduces so many variables.

We are not that far away from winter weather shutting down outside activities so will get back to some serious experimenting shortly.

Jerry

[simonbaker]

At the moment, I forget the actual resistance values, but as I recall they are fairly close to what we are looking for. I have the circuit for it pretty well worked out in my head. I got as far as a quick test on being able to null these two coils and that works good. My idea for the circuit is switching in a series RC circuit to shift the phase by a settable amount with forward biasing a diode. Used to do this with RTTY in amateur radio years ago.

You get the idea, just a means to test a TGSL/IGSL board without the coil because the coil introduces so many variables.

We are not that far away from winter weather shutting down outside activities so will get back to some serious experimenting shortly.

Jerry

Sounds interesting. I'd like to see the circuit when you get a chance. It's usually hard to passively introduce phase shift without attenuating the signal, but if you're driving a comparator, no problem.

I'd sure like to hole up for some serious experimenting -- got to hit that lottery...

-SB

[golfnut]

How does this machine compare with the IGSL.

Are they similar?

S