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Messages - RhodesRoundtable

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1
Everything else / Re: Oscilloscope
« on: December 10, 2008, 02:58:12 AM »
lendusaquid
I have a model V-509, which I was looking into new probes for, and it is similar to the Hitachi Model V-212.
If you need probes and/or manual, I finally found my links to these sources.
http://www.probemaster.com/shop/article_info.php?articles_id=5
http://www.probemaster.com/shop/advanced_search_result.php?keywords=4904-2&search_in_description=1&x=62&y=12
Price seems hight to me though!
Scanning the list you take the same master kit as mine apparently.
number 4904-2

0-1-2-3 pages for the manual. Have to click the numbers to start the load,
took me a sec to figure that out and I had a bit of trouble with them in firefox, but they do work.
http://www.eserviceinfo.com/downloadsm/16944/Hitachi_V211.html
They are in rar format so if you don’t have winrar, here is a 40 day trial de-compressor
http://www.download.com/WinRAR/3000-2250_4-10745708.html

I also found this interesting discussion on oscilloscope grounding.
http://www.electronicspoint.com/oscilloscope-grounding-question-t113920.html
http://www.marcspages.co.uk/pq/4120.htm
Hope some of this stuff helps.

obfu

2
Generators / Re: 10Kw gen on lister 6/1
« on: December 09, 2008, 02:49:57 AM »
Well, I guess that sets that straight!
Thanks Oliver
Evidently I didn't give enough credit to where I took this from, hence the peren (accurate?)
It sounded off, that is one reason I put it out there. I figured there could be something in tractor PTO's that I was clueless about. I See it failed your guys test. "poppycock! "  ;D
I did put it in quotes but I should have tagged the link
Post by Errin OH
http://www.ytmag.com/cgi-bin/viewit.cgi?bd=ttalk&th=326232

I appreciate straight talk even when the straight/crooked talkin is completely wrong, at least it is honest. Apparently no one was there to set this guy right, as I'm lucky enough to have here.
I know very little about this kind of stuff comparatively, and less about text books and basic mechanics. A somewhat light green, if you will. Most everything I know about this sort of thing is self taught, so I appreciate the expertise I have especially noted on this forum.
cheers


3
Generators / Re: 10Kw gen on lister 6/1
« on: December 08, 2008, 08:23:47 PM »
Fair enough matt, thanks for the communication.
The current price is $320 in store no shipping (I guess STs are about $400)
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=45416
They specify peak performance at 20HP.
HF and Northern Tool have been carrying these units for years and are probably the source for many net offers. I have seen them for around $289 last year. Also, they just sent me a 25% off coupon (usually 10%) that I let got to waste ($80 off that item for instance). If you are not familiar with harbor freight, they have very inexpensive tools, but they are cheap. China made really cheap stuff. One Note: There are 2 HF web sites http://www.harborfreight.com/
http://www.harborfreightusa.com/ (check the "see our current add on the left") They are, I'm told, independent and the former will almost always have higher prices. Below is an expansion on Tom's point about the 4" pulley and transmission loss problems that may be useful (accurate?). HF generator rpm requirements and drive ratio:
"A couple things to think about, 20hp @3600 rpm is the requirement to run it at full power (7200w). As for your setup, ie. 7 to one or 3 to 1, the hp requirements will change. Because you are stepping up, with 7 to 1 you need something like 140hp PTO hp to produce 7200w (60hp at 3 to 1). Likewise I would figure 20hp stepped up 7-1 would only produce something like 1000w before the tractor stalls. 20hp/7=3hp at gen, (6hp @ 3-1 ratio) figuring (7200w/20hp=360w per hp) You would be looken at 1080w and 2100w respectively. I am sure these are not exact figures and it does not mean it won't work. But if you are want 7200w you need the hp to get it (ie.. PTO hp x step up or an gen that will work at lower rpms). Regulation is another story and as stated in previous post, could be a real problem if your gov is not up to snuff. A miller 225 welder fit my needs just right at 7500w. But it has its own 20 hp twine cyl engine and internal reg. Good luck."

Best
Regards,
obfu

4
Everything else / Re: Driving a Curtis D96 with a Listeroid
« on: December 08, 2008, 02:14:11 AM »
Cool
thanks jens
I have a 3phase Beldor with the compressor and can purchase a single phase for about $350-400 but, since I expect things to deteriorate with regard to unforeseen events, dependence on the grid, and dependence on government, securing my family with power options is a fairly high priority.   
I can keep a hunk of iron running, I can't keep the grid online.
If I can save on a Curtis motor purchase in the process of providing power, all the better. 
I think I have a final answer after two years contemplation. I will go the Lister approach for fall back mechanical/electric power. Next step is securing hardware and funding. Funding is in the works soon with a bit of luck. Anyone have opinion on ASHWAMEGH vs POWERLINE
Thanks again all for generous knowledge sharing ;-)
obu

5
Generators / Re: 10Kw gen on lister 6/1
« on: December 08, 2008, 01:32:36 AM »
matt,
not to be argumentative, but after consideration I concluded my question and input were pertinent to the thread. 1958steve is dealing with availability of a gen-head (specifically 10Kw). Therefore, it seems not at all like a change of topic. I would, however, like to adhere to forum etiquette and not step on the toes of veterans. Any agree it was not closely enough related, please let me know.

In any event, thanks for the link though matt.   

6
Everything else / Re: Driving a Curtis D96 with a Listeroid
« on: December 07, 2008, 11:18:31 PM »
Oliver,
Yes I misstated it should be "custom pulley mounted to D96 driven from Lister flywheel"
thought mangling, sorry
Yes there is an unloader, and thanks all for the input 

7
Generators / Re: 10Kw gen on lister 6/1
« on: December 07, 2008, 10:58:04 PM »
Great link adhall

Any opinions on the Chicago 10KW 3600 rpm gen head quality? It appears it would be unsuited to 6/1 8/1 lister pair-up
2 pole rated 16hp
http://www.harborfreight.com/manuals/45000-45999/45416.pdf

8
Everything else / Re: Oscilloscope
« on: December 07, 2008, 10:31:49 PM »

9
Everything else / Re: Driving a Curtis D96 with a Listeroid
« on: December 07, 2008, 10:23:30 PM »
thanks a great deal for the thoughts Mike and Jens
Mike it sounds to me the 8/1 may be more suited (more fuel though), since I have read the 12/2 or any twins can have crankshaft tolerance and fatigue issues and may not be the best option.
"(no point in loosing efficiency in both the generator and the electrical motor)"
I agree wholeheartedly jens. I would be looking at intermittent use on the Curtis unit but I would prefer to eliminate an electric motor and apply funds to an additional lister or other. Thanks for the info about engine load.
My vision is the lister would drive a Gen Head as well (I like the old line shaft image and possibilities) but obviously not at the same time as the comp head. Maybe some transmission clutch mechanism could be arranged to switch the load between Genhead and compressor head? That may allow for load requirements via building perimeter lights (sodium), or water heater maybe? a load balancing technique. Or am I thinking this wrong.   
 

10
Everything else / Driving a Curtis D96 with a Listeroid
« on: December 07, 2008, 09:23:00 PM »
Hello everyone,
I'm happy to be a participant in this forum which I had learned of a fews years back through otherpower website links.
My knowledge is limited in this area.
My question or plea for advice/guidance is as follows:
Is it possible to drive a Curtis D96 5-7hp compressor head by serpentine belt directly from a pulley mounted to a lister 6/1 flywheel?
The next question would be, is it desirable or the best approach for achieving that purpose vs , say running a Gen Head from the 6/1 that in turn drives an electric motor (assuming the 6/1 and Gen Head would handle load requirements)?
Pitfalls, practicality, and problems? 
I could find very little in the way of images of the D96 on the web
Here are some D96 details I did find to give a sense     
http://www.compressorsandmore.com/products/display.php?RecordID=95
http://www.curtistoledo.com/pages/download.htm?ft=download&id=6&fid=30
http://rpiengines.com/D96.htm
Note: my setup is a horizontal tank configuration as pictured here left.
http://denver.craigslist.org/tls/928497365.html

On another note, I ran across a site discussing conversion of compressor heads to hit and miss engines here is a pic.
Just an info bit I'm sharing, no intention of doing such a thing. pic at post Dick Graybill  02-20-2008, 03:24 PM
http://www.smokstak.com/forum/showthread.php?t=45188

Thanks to all,
Regards,
obfuscation
 

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