TGSL prints

[ripsdevala]

Yes, 2 weeks or more to arrive, I will work another thing maybe

[blobber]

Maybe my first post (#84) this thread will help you.
There is only a very small area, in GEB adjustment, where I have a good detection range.

[ripsdevala]

Maybe my first post (#84) this thread will help you.
There is only a very small area, in GEB adjustment, where I have a good detection range.

Let me try with multiturn trimpot...
Btw my best nulling is 12mV with help from a thin foil

[ripsdevala]

Nothing change.....
Btw I already get 28cm, 30cm with pft...pft....trrttt..trtt sound, by tgsl v.3 with hard stiff stoned resin glued coil, but how you made it into 40cm and nulling at 4mV.... any methods that i dont know maybe?

[ripsdevala]

Nothing change.....
Btw I already get 28cm, 30cm with pft...pft....trrttt..trtt sound, by tgsl v.3 with hard stiff stoned resin glued coil, but how you made it into 40cm and nulling at 4mV.... any methods that i dont know maybe?

28cm only on thin side of the coin not from back or front side.... why?

[blobber]

Your distance is not too bad, I think you have still wrong relationship in phase TX / RX. With oscilloscope and careful adjustment capacitor in RX tank you will make correct phase.
You should have now a double beep, while you swing the coin flat over your coil, if so, you should change wires in RX!
I hope you will get soon your oscilloscope...
Than also you can change maybe IC's and see, which one gives most gain..

[ripsdevala]

Yes you are right, when fliped coin back or front its make double beep, i will try again later...

[ripsdevala]

Good day all, blobber I just change the cable its still make double beep in close range.
Btw about my oscilloscope order, its rejected and refund, now i have one choice for used analog YB4328 20mhz near my place, is this good enough?

[rickb]

How much is the scope? for an IB detector, 20 Mhz dual trace is fine. For a PI with a cpu, 100 MHz would be better. If you still have interest in a new scope, read this post, http://www.avrfreaks.net/comment/834238#comment-834238) and then read the entire thread. With Agilents (HP and now Keysight) help, Rigol designed a series of entry level DSOs for Agilent. While not up to the level of my Tek TDS3012, it is still a very capable scope and a LOT less expensive. Read the thread and search for reviews.

[ripsdevala]

Its about $116, not used, old stock, 100Mhz would be pricey

[ripsdevala]

Ok guys I buy it, as oldchart say before

I do not recommend that model. It has very limited functionality for this use the bandwidth is only 200Khz which is too low and it has only a single channel which wil not allow you to compare the timing between two signals. This requires two channels to do easily.
One last limitation is that it is limited to only 50 volts which is easily exceeded by many PI detectors.
Keep looking and see if you can find one that is:
at least 1 MHz bandwidth
at least 2 channels
can tolerate at least 200 volts

this one would be a little better, it is made by the same manufacturer.
http://www.jyetech.com/Products/LcdScope/e112.php
It has more bandwidth, lower noise, still is only one channel but has external triggers so you can measure between two channels, and does have a case.

[rickb]

Stick with the 2 ch DSO 094. Being able to see both ch. while triggering on 1 ch. removes the ambiguity in phase measurements and timing relative to a reference.

This guys stuff is being pirated by others, so buy it directly from him or AccuDIY if you can.



Rick

[ripsdevala]

I mean for YB4328, my budget is at max for this one, 2ch 20mhz, 400v max.
If someday I need more i will upgrade it, thanks for the suggestion Rick, I will pick it up today if have a time.

[ranis]

Good evening, the values are these 4k7?
Did yours work?
Thank you. I'm from Brazil.

[ripsdevala]

As long as you follow the diagaram, all will work