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Offline Homefire
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« Reply #70 on: December 12, 2016, 09:15:53 pm »
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Pain in the BUTT.   They pay a whopping $6.25 a hour.  LOL  Not even Minimum.

Eaa the board came Registered. Had to go sign for it.  Had no Idea what came Registered.  Around here Registered letters are bad news most the time. 

 
 Nice Boards. 



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« Reply #71 on: December 13, 2016, 04:00:54 am »
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thanks for the positive feedback Homefire. i choice simple schematics for a release, without difficult tunings.
for example fisher CZ-5 has 20+ trimmers on board that needed in detail instruction what to do with every one.
its hard for me with my poor english.
if for you tantalums are hard to find set SMD ceramics on the bottom side, 0,1 and more uF.
i find the tantalums from old PC mother boards.

all the best

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« Reply #72 on: December 13, 2016, 08:28:43 am »
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 Nice Board for sure.   As for the Bottom Board Caps,   ordered tantalum but if I don't like the fit I have some Ceramics that will fit the bill. 

Thank You Sir.   

I assume the GeoTech Build Document can be used on this ?



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« Reply #73 on: December 13, 2016, 10:53:19 am »
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yes, but you have to follow my BOM file. George did change a schematic, reconnected resistors in delay circuit part.
my board is a copy of original board, i did not change the original schematic.

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« Reply #74 on: December 13, 2016, 11:56:21 am »
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    The Original Circuit was able to sample down to 10uS, Right ?

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« Reply #75 on: December 13, 2016, 12:47:31 pm »
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General spec measured by me [Alexis here, not mine data]
-transmiter pulse Fcy= 640 PPS
-Transmitter pulse width= 100 uS (microseconds)
-pulse delay =begin at 22 uS to 60 uS .
-Position knob Delay 1= 22 uS, position 4 =40 uS, Position 9 = 60uS
-sample pulse window 45 uS
Current consumption - 100Ma at 10,5V

Posted on: December 13, 2016, 12:45:16 pm
upload those files on bara

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« Reply #76 on: December 13, 2016, 01:45:13 pm »
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   It seems that is what your to set it for but I think the circuit it's self is capable of less ?

Well my Tayda parts seem to be taking a tour of the South West USA.   Tracking said delivery date of 13 Dec and now they say it just got to Phoenix Az today at 13:40.  LOL

It only has Abq, El paso and here to go.  Recon it may be here Friday or Saturday.

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« Reply #77 on: December 13, 2016, 02:08:52 pm »
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capable and all pi's are capable. another thing phisical restricting by salt water influence.
eric foster got 5us in conditions of his table at wife's kitchen, not in real conds.
in real conds he has to increase delay to 10us, in salt water it will be more and 12-15.

do you mean the dual front end that so was been up by main geotecher?  Pray

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« Reply #78 on: December 13, 2016, 03:14:02 pm »
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Rats.... still no board here......

NE555 any postal  tracking on that??


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« Reply #79 on: December 13, 2016, 03:44:09 pm »
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    As is the board will do 10uS ?  No Salt Water hear in the Desert.  Some Mineralized Ground but By nature the PI should be able to handle most of that.

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