[NSRCA-discussion] Supplier Credit - Re: IOTA 55 Powersupply - not holding voltage.

Thu Jul 2 06:21:54 AKDT 2009

I should retrace my steps a bit, I had used this system for over a year with good success and the loads discussed. Then had a problem; so I figured something changed. 

Im no electrical whiz.....so dont have much business messing with a scope but see the value for you guys that know. 

The Iota has a plug you can stick in to boost to 14+ volts, which I did during my troubles and the problem remained but at higher voltage  ;-)

________________________________
From: Ed White <edvwhite at yahoo.com>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, July 1, 2009 5:13:52 PM
Subject: Re: [NSRCA-discussion] Supplier Credit - Re: IOTA 55 Powersupply - not holding voltage.

I was having similar problems on Cellpro's with the power supply I was using (not Iota).  Looking at the voltage input to the charger on an oscilloscope shows the load from the Cellpro's is far from steady and way too fast to see on a meter.  Switching power supplies really prefer a steady load.  I thought about capacitors and did some calculations, but at the currents we're drawing, they have to be very big.  I tried some ones I had around (15,000 uF) and that helped, just a little. As John said, you really have to look at it on an o-scope to see if you're doing any good.

I ended up modifying the computer power supplies I'm using to put out higher voltage.  That seems to be enough to keep the Cellpro's satisfied though I run them at less than full power.

Ed

________________________________
From: John Pavlick <jpavlick at idseng.com>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, July 1, 2009 12:32:29 PM
Subject: Re: [NSRCA-discussion] Supplier Credit - Re: IOTA 55 Powersupply - not holding voltage.

Chris,
 If you have access to an oscilloscope by all means use it. You may not see everything with a DVM. A meter responds relatively slowly to voltage fluctuations as compared to an osilloscope. If the power supply is a switching type (I believe it is) the output may be "noisey" and that could be what's screwing up your chargers. Sometimes a capacitor across the power suppply outputs can help this but you need an oscilloscope to see what you're doing. :)

John Pavlick

--- On Wed, 7/1/09, Chris Moon <cjm767driver at hotmail.com> wrote:

>From: Chris Moon <cjm767driver at hotmail.com>
>Subject: Re: [NSRCA-discussion] Supplier Credit - Re: IOTA 55 Powersupply - not holding voltage.
>To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
>Date: Wednesday, July 1, 2009, 1:05 PM
>
>
>Brian. Were you getting unstable input voltage errors? My cellpro chargers are doing this now. May be a firmware issue inside chargers. I have not put a meter on mine yet to verify the iota is really the issue.
>Chris
>
>-- Sent from my Palm Pre
>
________________________________
brian young wrote:
>
>
>Just a followup on this and IOTA as a pseudo pattern supplier. I left them an Email and they said whats your address we will ship you a new one return the old one in a box, that was nice. 
>
>Brian
>
>
>
>
________________________________
From: Brian <brian_w_young at yahoo.com>
>To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
>Sent: Friday, June 26, 2009 6:22:45 PM
>Subject: [NSRCA-discussion] IOTA 55 Powersupply - not holding voltage.
>
>Has anyone had any problems with these? Mine when drawing from 2 chargers and only 19 amps or so on the supply output, drops output voltage to 12-11.9 vdc. My chargers dont like this.
>Curious what might be going on with it
>Tks
>Brian
>
>
>
>________________________________
From: Richard Strickland <pamrich47 at hotmail.com>
>Sent: Friday, June 26, 2009 4:21 PM
>To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
>Subject: Re: [NSRCA-discussion] Generator - Honeywell 2000i
>
>Looks suspiciously like the Honda in many details...hmmm.
>You can probably get an extended warranty with it for not too much.
>RS
> 
>________________________________
Date: Fri, 26 Jun 2009 10:35:53 -0700
>From: bob at toprudder.com
>To: nsrca-discussion at listsnsrca.org
>Subject: Re: [NSRCA-discussion] Generator - Honeywell 2000i
>
>
>Went by HD at lunch. No luck. Doesn't look like they ever carried that model at the store where I went. Drats.
>
>I went online at the HD website and found this:
>
>http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100669124
>
>Only 26lbs. Price includes shipping. I ordered one. I figure 750w AC should run my chargers and a fan. :-)  I ran the battery in my van down once, it still started but the alternator quickly went out trying to charge a nearly dead battery. Don't want that to happen again. I have a 20 amp 12v power supply, but think I will get a 30 or 40 amp RV converter to go with this generator.
>
>I'll let you know how it turns out.
>
>Bob R.
>
>--- On Fri, 6/26/09, Richard Strickland <pamrich47 at hotmail.com> wrote:
>
>
>>
>>Well that would make sense--they speed up to produce power as it's needed--and a heating element is on and off to maintain an average temp.  Certainly worth looking at.  I like the little Honda as it's fairly easy on my wimpy back and quiet enough if you run an extension from having it at the front of the vehicle to the back--you are hardly aware it's there at full power.  There's enough power to run two chargers and a small fan for motor cooling on hot days...  I need to get a little oscillating fan--cool the motor--cool the pilot--cool the motor....
>> 
>>BTW, I happened to be in the Muncie area touring some glass and fiberglass manufacturing facilities--(HOT)--but got a chance to stop by the AMA Headquarters after hours.  What a great place to fly!
>>A few of the early bird CA guys were there practicing for the Aerobatic Nationals next week--impressive from what we were able to see...  Got me thinking a little about the bigger stuff--but I'm fighting it...
>>RS 
>>________________________________
Date: Fri, 26 Jun 2009 07:31:50 -0700
>>From: bob at toprudder.com
>>To: nsrca-discussion at lists.nsrca.org
>>Subject: Re: [NSRCA-discussion] Generator - Honeywell 2000i
>>
>>
>>One guy on the RV forum bought one at that price. The only complaint he had about it was the eco mode causing it to speed up and slow down constantly while his coffee maker was on. :-)  I think it is worth looking at, and I plan to go down to HD today to see if they have one.
>>
>>Bob R.
>>
>>
>>--- On Fri, 6/26/09, David <teamvertical at excite.com> wrote:
>>
>>
>>>From: David <teamvertical at excite.com>
>>>Subject: [NSRCA-discussion] Generator - Honeywell 2000i
>>>To: nsrca-discussion at lists.nsrca.org
>>>Date: Friday, June 26, 2009, 11:17 AM
>>>
>>>
>>>
>>>I was reading on RCU jet forum that Home Depot is selling the Honeywell 2000i generator for $299 in store price. Has anyone had experience with this generator? You will not find this price at Home Depot online. It is a in store sale price only.
>>>Thanks
>>>Dave
>>>
>>>
>>>
________________________________

>
>[The entire original message is not included]
>_______________________________________________ NSRCA-discussion mailing list NSRCA-discussion at lists.nsrca.org http://lists.nsrca.org/mailman/listinfo/nsrca-discussion 
>-----Inline Attachment Follows-----
>
>
>_______________________________________________
>NSRCA-discussion mailing list
>NSRCA-discussion at lists.nsrca.org
>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20090702/04c13ec8/attachment.html>