GS 5 THRESHOLD PROBLEM

[dbanner]

we need full batch of board pics of GS5 in high resolution, high resolution is NOT 150kb, not 230, not 360 and not 1Mb.
high resolution is 5MB-10MB. high resolution is such as we see easely marking of values of SMD resistors.
we need both sides of the pcb pics. we need the information, not those noise why low drop and why not low drop.
we need new winter project for everybody.

Requests have been made before, but to no avail. I personally don't see the big deal, since the GS5 is no longer in production, and sharing pics of PCB is not infringement of anything. So why not share pics? To prevent reverse engineering? Really? Don't make sense to me.
But If device was obtained on condition of promise not to publish any pics, then there isn't anything wrong with that either.
It is common occurrence of members to share pics of pcb with others on forum, nothing unusual or unethical or even illegal about that. But for a reasonable request to fall on deaf ears is a little impolite to say the least. Very curious indeed.

[kt315]

i see absolutely ununderstanding of some people that a batt is only a capacitor. i tell in the space and feeling yourself like full idiotic here.
i think capitalistic world does not have school education at all. bad.

i think our world is quickly and fast degrading on level of monkey.

[daverave]

Hi Eric...ive been the same and had no problems with noise whatsoever....to be honest i do prefer using straight battery power....i think it all depends on how light and compact you want to make the detector....but for high power detectors i think converters will drain the batteries much quicker....you mentioned about li-ion batteries failing below 2.9v volts...so if i risk discharging down to say 2.5v will i ruin the batteries ???

[Ferric Toes]

i once used a voltage converter with a surf pi using three li-ion batteries and it worked very well with a large elect capacitor on the output and the detector was very stable indeed.

I have successfully used a MT3608 converter in a PI design and not had noise problems. However, a few precautions had to be taken. I added extra 5uF ceramic capacitors to the input and output pads. The MT3608 runs at 1.2MHz so it is easier to filter than lower frequency converters. The convertor was housed in a small screening box together with a -12V linear regulator. The MT3608 is of course a positive regulator but there seems no reason not to ground the + output and put the 7912 negative regulator on the minus side. You cannot ground the positive side of the battery with this arrangement.. Anyway, it works well and no additional noise. The 7912 could be replaced by a 7915 to give -15V and the trimmer on the MC3608 board adjusted for, say, 18V from the converter. For my -12V version, the input is from six NiMh AA cells, giving 7.2V. I have tried Li-ion cells and two in series would work fine, but they must have protection circuitry. Otherwise if the detector is inadvertently left switched on and the batteries discharged below 2.9V the batteries will likely fail. NiMh cells are more forgiving. I will take a picture of this arrangement and post shortly.

Eric.

[kt315]

we need full batch of board pics of GS5 in high resolution, high resolution is NOT 150kb, not 230, not 360 and not 1Mb.
high resolution is 5MB-10MB. high resolution is such as we see easely marking of values of SMD resistors.
we need both sides of the pcb pics. we need the information, not those noise why low drop and why not low drop.
we need new winter project for everybody.

[daverave]

i once used a voltage converter with a surf pi using three li-ion batteries and it worked very well with a large elect capacitor on the output and the detector was very stable indeed.

[dbanner]

your words must be heared by Whites Electonics Company, Garrett, First Texas, ML. really they are all downito idiotics if using not low drops but convertes in every detectors they manufacture novaday.

Thanks for your reply. Yes, they are all idiots. Satisfied?
They are stupid enough to engineer solutions to issues because they are dumb enough to embrace more sophisticated technology and find custom solutions which are now economically viable, whereas before they were not. And they must be morons for looking to minimize cost and maximize profits in such a competitive market.
I wouldn't be surprised if the idiots are using sm ferrite beads for filtering on their primitive low tech devices including building PCBs with inductive tracks for noise suppression. Primitive indeed.
We kitchen table scientists must be superior to those idiots.

[kt315]

Is it noise emitted from device by air, or is it noise(ripple)(switching noise) in the line itself? I read their is some noise in the line but couldn't it be filtered out, or wouldn't it be beyond the range to matter, or wouldn't the inherent filtering in the MD circuits take care of it?
I think problem might occur with input noise to converter if tx and buck converter share same battery. Then I think I see what you mean by synchronized. Input noise from tx would appear on output of converter.

your words must be heared by Whites Electonics Company, Garrett, First Texas, ML. really they are all downito idiotics if using not low drops but convertes in every detectors they manufacture novaday.

[dbanner]

Is it noise emitted from device by air, or is it noise(ripple)(switching noise) in the line itself? I read their is some noise in the line but couldn't it be filtered out, or wouldn't it be beyond the range to matter, or wouldn't the inherent filtering in the MD circuits take care of it?
I think problem might occur with input noise to converter if tx and buck converter share same battery. Then I think I see what you mean by synchronized. Input noise from tx would appear on output of converter.

Re- read my post. I see your point. Second issue would be noise generated by converter itself which cannot be synchronized with tx with off the shelf converter.

[eclipse]

lots of videos on youtube to show the ripple noise and all switching regulators have those do some research. https://www.youtube.com/watch?v=nVIpDIIiuF8
sure you can filter it RC/LC filters and such but it's still there no matter what, except if you can't sync it with TX cycle.

on pulse induction metal detector this noise is highly unwanted if you want to get stability.
curing one problem (unstable threshold) by introducing new problem (supply voltage noise) is not very wise.

[daverave]

You could find a bunch of smd regulators in old add on boards from old PC stuff.
But they're rated only around 100ma. You need something rated @1A, hence TO220.

i would use the LM 2991 SM version just for the audio pcb and leave the LM 337 as in Eric's spec.

[dbanner]

Dave the problem is not the converter efficiency but the fact that where they are not synchronized they pour in too much noise.
I don't recommend using them at all if you can sync them with the TX cycle.

Is it noise emitted from device by air, or is it noise(ripple)(switching noise) in the line itself? I read their is some noise in the line but couldn't it be filtered out, or wouldn't it be beyond the range to matter, or wouldn't the inherent filtering in the MD circuits take care of it?
I think problem might occur with input noise to converter if tx and buck converter share same battery. Then I think I see what you mean by synchronized. Input noise from tx would appear on output of converter.

[kt315]

noise on Mars. but why they are like children joy on just noise?? https://www.youtube.com/watch?v=yT50Q_Zbf3s

[kt315]

Dave the problem is not the converter efficiency but the fact that where they are not synchronized they pour in too much noise.
I don't recommend using them at all if you can sync them with the TX cycle.

if much noise do not use android phone, PC, LCD monitor, LED lamps. turn off all around you. live in darkness.
turn on a radio and hear a cosmic noise. this noise is going from Milky Way amigo.

[kt315]

You could find a bunch of smd regulators in old add on boards from old PC stuff.

America can use bunch of Soviet era rockets engines on the its modern heavy rockets like DELTA IV.
give new life to oldest stuff.