Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel

Log In

A valid email is required.
Password is required.
Site Notices
criticality accident
Avatar
Bronze
  • Joined Sep 2004
  • Posts 8516
  • Location USA USA
Offline Positive Feedback
Bronze
  • Joined Sep 2004
  • Posts 8516
  • Location USA USA
Offline Positive Feedback
Posted: 11/2/2008 6:43:52 PM EST
Might have one of these available to me in visually clean but unknown functional condition. I've been looking for a small(ish) diesel generator though and so it seems like a good idea, as long as it works or can be brought up to operating condition at a practical cost in dollars and labor. Also some general idea of what it's worth so I can make a reasonable offer on it.

As an aside it supposedly does 120/240VAC as well as 28VDC... wonder if there'd be any way to convert it to 13.8VDC.
This is...a clue. - Pat_Rogers
Member
Avatar
Bronze
  • Joined Sep 2005
  • Posts 1345
  • Location USA USA
Offline Positive Feedback
Bronze
  • Joined Sep 2005
  • Posts 1345
  • Location USA USA
Offline Positive Feedback
Posted: 11/2/2008 6:54:56 PM EST
[Last Edit: 11/2/2008 6:59:51 PM EST by lumper]
there are several ways of dropping the DC. The question for you is what is your amperage requirement from it, and how exact do you need the voltage to be.

If you are going to charge 12 volt batteries, simply charge two of them in series at a time. Otherwise you will need a regulator. You can rig a simple one with high current diodes from radio shack if you have no other options, but there are better ways of doing this depending on your current needs.

Edited to add, if you just want to run a laptop, a regulator should do it fine.
The king of surplus!
Avatar
Dealer
  • Joined Nov 2000
  • Posts 13773
  • Location USA NC, USA
Offline Positive Feedback
Dealer
  • Joined Nov 2000
  • Posts 13773
  • Location USA NC, USA
Offline Positive Feedback
Posted: 11/3/2008 3:52:29 PM EST
www.oldgrouch.com for all your surplus needs
Basic
  • Joined Oct 2007
  • Posts 1843
  • Location USA OK, USA
Offline Neutral Feedback
Basic
  • Joined Oct 2007
  • Posts 1843
  • Location USA OK, USA
Offline Neutral Feedback
Posted: 11/3/2008 3:58:50 PM EST
a 3600 rpm diesel seems to defeat at least some of the purpose of getting a diesel - usable power output at low rpm, which equals longer life.

northerntool has a selection of diesel gensets.
Basic
  • Joined Jul 2001
  • Posts 601
  • Location USA AL, USA
Offline Neutral Feedback
Basic
  • Joined Jul 2001
  • Posts 601
  • Location USA AL, USA
Offline Neutral Feedback
Posted: 11/3/2008 4:31:17 PM EST
a 3600 rpm diesel seems to defeat at least some of the purpose of getting a diesel - usable power output at low rpm, which equals longer life.

Just a note- Diesel generators don't run at variable RPMs like tractors, air compressors, welders, etc. That have to run at 1800 or 3600 rpms to generate 60 Hz power (some huge generators may run slower.) The RPMs time the number of pole pairs allways has to equil 3600 (ther number of cycles in a minute). The exception is in inverter based generators or locations useing 50 Hz power.

But yeah, the 1800 rpm generators are quieter, vibrate less, and last longer, but are slightly less fuel efficient. But a 3600 rpm Yanmar will outlast a honda anyday, which will outlast almost anything else portable.
criticality accident
Avatar
Bronze
  • Joined Sep 2004
  • Posts 8517
  • Location USA USA
Offline Positive Feedback
Bronze
  • Joined Sep 2004
  • Posts 8517
  • Location USA USA
Offline Positive Feedback
Posted: 11/3/2008 4:48:29 PM EST
[Last Edit: 11/3/2008 5:00:34 PM EST by Gamma762]
The part number I got off the manuals that supposedly went with the unit, they describe a diesel powered generator and that's what the person who has the generator says they are. He said they were made by Onan. I didn't get a chance to look it over closely, I did get an overall photo of the unit though if it would be helpful. I'll try to check back with him and get a look at nameplate, etc.

One of the reasons I was looking for a diesel is quieter running so if it's a higher RPM and noisy that would not be as good.

I did notice that it has a single battery for starting so it's a 12v starter (or so it would appear).
This is...a clue. - Pat_Rogers
Top