[AT] Slow Day

Sat Jul 25 10:08:40 PDT 2020

 The ones we used in the vibrator trucks were rated for over 300 hp and cost only $32,000 each.  We used them to make it easyier to control the spacing between trucks.  Had ultrasonic sensors to measure the distance between the trucks.  They operated as an array and spacing was important.  Some array designs had different spacing between each truck.
The hydrstatic transmission was much easier to precisely control spacing between trucks. Three to five trucks in an array was common and there would be multiple fleets of trucks that would stop shake the ground then pull up the pad and move forward to the next shot point.  While they were moving another fleet would shake the ground.  Speed things things up a bit. 
The older trucks were built on Mac Truck chases with normal transmissions. Not having a drive shaft from the front and rear drive allowed putting a bigger vibrator in the middle to get more signal. 
In the US the wheeled version is common. Some places use the tracked version.
This is the company I use to work for.  The name changed many times.  When I joined the name changed to Geosource that was the name it was know by for many years.
https://www.inovageo.com/products/category/source-products/vibrators

Seismic Vibrator truck

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Seismic Vibrator truck

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    On Saturday, July 25, 2020, 09:34:12 AM CDT, Brian Lesh <lesh at kci.net> wrote:  

I drove a 1971 Dodge 900 that the owner had taken the 5 speed out and put a Sun-Strand hydro-static transmission in thinking that he could put about anybody in them to drive.  They left the 4 speed Brownie in.  These trucks pulled pups and grossed between 85,000 and 100,00 running 24/7 for about 3 months of the year.   They weren't very reliable in this particular application and wasn't much fun to drive.  Just wrap it up to 2000 rpm and go.  

Brian CO

 On 7/24/2020 8:20 PM, ustonThomas Mehrkam wrote:

 We over 2000 acres in South Texas. Had a big Massey Ferguson Diesel with a cab.  I drove that thing all summer in 73 and 74.  Heat of the summer 85 to 101 degrees.  It was not all that bad at least the windows opened and were tinted.  Had a little shade.  Better than the gas tractors.  Massey Harris 33 and a big case Diesel with no cab or the Miniapplis Moline with the ^^%% hand cluch.  I preferred the one with the cab. Later we but an AC on that tractor but could never make it work reliability.  Old R12 system.  
  I decided to study Electronics as I liked building ham radios and fixing TV's. And it had to be a whole lot cooler than farming.  Got an Electrical Engineering degree and spent the next 45 or so years designing Food Sorting, Food Weighing and Food Packing Machines. Then down hole tools, Seismic Oil Exploration systems both Land and Marine.  
  I got to rebuild Sun-strand hydro-static transmissions in the desert in the middle east.  I was sent to commission the electronics I designed for the vibrator trucks. Electronics worked great the Hydraulics were shit. I got to put my farm experience into practice. This was in 106 degree plus temperatures in the middle of the sand dunes. :-{  Made me wish for my farming days driving tractors in south Texas and pulling/Hoeing/Chopping  goat weeds in 2000 acre peanut fields with two mile long rows.  
  I got to ride a Chinese Seismic Exploration Vessel.  I designed much of the electronics for that vessel and spent two months installing and debugging the electronics and software off shore Papua New-Guinea sailing over the great barrier reef.  It was not near as exciting as the ride from South Korea  to Papua New-Guinea where it was built through a CAT 3 Hurricane or Typhoon.  
  Now I am on my Grand Fathers farm working on the retirement place. I am not going to complain about the 90 to 101 degree days.  Anyone want to help clear brush or build 5000 ft of fence?   Enough Rant. I have some post holes to dig.  

      On Friday, July 24, 2020, 04:59:06 PM CDT, Brian Lesh <lesh at kci.net> wrote:  

   Since things are slow I'll try to post a picture.  There is sorghum 
  planted here but the weeds got the best of the situation. We decided to 
  clip them with the old Ih 560.  Not sure if it qualifies as antique but 
  it's almost as old as I am.  Took the picture when I had to stop and dig 
  out a piece of barb wire.  The only problem all day.  Well should say 
  all morning cause I couldn't sit in that hot box all day.

  Brian CO
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