<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office"><head><!--[if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><body><div class="ydp1b8a750dyahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div dir="ltr" data-setdir="false">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.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">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. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">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. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">In the US the wheeled version is common. Some places use the tracked version.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">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.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><span><a href="https://www.inovageo.com/products/category/source-products/vibrators" rel="nofollow" target="_blank">https://www.inovageo.com/products/category/source-products/vibrators</a></span><br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><span><a href="https://www.youtube.com/watch?v=8EVilzqcggk" rel="nofollow" target="_blank" class="enhancr_card_5974204822">Seismic Vibrator truck</a></span><div><br></div><div id="ydp799752a1enhancr_card_5974204822" class="ydp799752a1yahoo-link-enhancr-card ydp799752a1ymail-preserve-class ydp799752a1ymail-preserve-style" style="max-width: 400px; font-family: YahooSans, Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif; position: relative;" data-url="https://www.youtube.com/watch?v=8EVilzqcggk" data-embed-url="https://www.youtube.com/embed/8EVilzqcggk?feature=oembed" data-type="YENHANCER" data-size="MEDIUM" contenteditable="false"><a href="https://www.youtube.com/watch?v=8EVilzqcggk" style="text-decoration:none !important;color:#000 !important" class="ydp799752a1yahoo-enhancr-cardlink" rel="nofollow" target="_blank"><table border="0" class="ydp799752a1card-wrapper ydp799752a1yahoo-ignore-table" cellpadding="0" cellspacing="0" style="max-width:400px"><tbody><tr><td width="400"><table border="0" class="ydp799752a1card ydp799752a1yahoo-ignore-table" cellpadding="0" cellspacing="0" width="100%" style="max-width:400px;border-width:1px;border-style:solid;border-color:rgb(224, 228, 233);border-radius:2px"><tbody><tr><td class="ydp799752a1card-primary-image-cell" background="https://s.yimg.com/lo/api/res/1.2/KWTi0kgO0BqnwMW6aDKTSQ--~A/Zmk9ZmlsbDt3PTQwMDtoPTIwMDthcHBpZD1pZXh0cmFjdA--/https://i.ytimg.com/vi/8EVilzqcggk/hqdefault.jpg.cf.jpg" bgcolor="#000000" valign="top" height="175" style="background-color: rgb(0, 0, 0); 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line-height: 19px; margin: 0px 0px 6px; font-family: YahooSans, Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif; color: rgb(38, 40, 42); max-width: 314px;">Seismic Vibrator truck</h2><p class="ydp799752a1card-description" style="font-size: 12px; line-height: 16px; margin: 0px; color: rgb(151, 155, 167);"></p></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></a><div class="loadingSpinnerContainer" style="position: absolute; top: 0px; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; background-color: rgba(255, 255, 255, 0.3);"><div class="D_F F_n gl_C ab_C H_6MGW o_h"><div class="W_6MGW H_6MGW D_X ah_1PEzoz" data-test-id="loading_indicator"><svg class="W_6MGW H_6MGW ah_Zq6hUs" viewBox="0 0 24 24" width="24" height="24"><path class="cdPFi_n cZ13pKbK_Z2aVTcY cZ1XO2Ji_dRA c2abBOT_EY cZ1vNhDV_rd cZV8aCd_pI ah_14s73" d="M12,22C6.477,22,2,17.523,2,12S6.477,2,12,2"></path><path class="cdPFi_n cZ13pKbK_Z2aVTcY cZ1XO2Ji_dRA c2abBOT_EY cZ1vNhDV_rd cZV8aCd_pI ah_14s73" d="M12,2c5.523,0,10,4.477,10,10s-4.477,10-10,10"></path></svg></div></div></div></div><div><br></div><div><br></div><div><br></div><br></div><div><br></div>
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On Saturday, July 25, 2020, 09:34:12 AM CDT, Brian Lesh <lesh@kci.net> wrote:
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<p>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. <br clear="none">
</p>
<p>Brian CO<br clear="none">
</p>
<div class="ydp8b138149yiv2894497414moz-cite-prefix">On 7/24/2020 8:20 PM, ustonThomas
Mehrkam wrote:<br clear="none">
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<div dir="ltr">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. </div>
<div dir="ltr"><br clear="none">
</div>
<div dir="ltr">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. </div>
<div dir="ltr"><br clear="none">
</div>
<div dir="ltr">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. </div>
<div dir="ltr"><br clear="none">
</div>
<div dir="ltr">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 <span><span style="color:rgb(0, 0, 0);font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;">where it was built </span></span>through
a CAT 3 Hurricane or Typhoon. </div>
<div dir="ltr"><br clear="none">
</div>
<div dir="ltr">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?</div>
<div dir="ltr"> </div>
<div dir="ltr">Enough Rant. I have some post
holes to dig. </div>
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<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div> On Friday, July 24, 2020, 04:59:06 PM CDT, Brian Lesh
<a shape="rect" class="ydp8b138149yiv2894497414moz-txt-link-rfc2396E" href="mailto:lesh@kci.net" rel="nofollow" target="_blank"><lesh@kci.net></a> wrote: </div>
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<div dir="ltr">Since things are slow I'll try to post a
picture. There is sorghum <br clear="none">
</div>
<div dir="ltr">planted here but the weeds got the best of
the situation. We decided to <br clear="none">
</div>
<div dir="ltr">clip them with the old Ih 560. Not sure if
it qualifies as antique but <br clear="none">
</div>
<div dir="ltr">it's almost as old as I am. Took the picture
when I had to stop and dig <br clear="none">
</div>
<div dir="ltr">out a piece of barb wire. The only problem
all day. Well should say <br clear="none">
</div>
<div dir="ltr">all morning cause I couldn't sit in that hot
box all day.<br clear="none">
</div>
<div dir="ltr"><br clear="none">
</div>
<div dir="ltr">Brian CO<br clear="none">
</div>
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