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 > Your search for posts made by 'Wayne Dohnal' found 140 matches.

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  Subject Author Date Posted Forum
RE: CFL bulbs

Deleted post.
Wayne Dohnal 07/02/15 10:17am Tech Issues
RE: Tire rotation with duals

I've asked this before on other threads, but no answers. For those of you that have installed the Dually or Borg valves, how does the tire store balance those particular wheels with the long valve stems?In my case at Discount Tire, they just treated the wheels the same as with standard stems, using their standard spin balance machine. The only added risk I saw is that it's easy to accidentally whack the long stem with one of the tools when mounting and dismounting a tire. One of my stems died an early death from this.
Wayne Dohnal 05/20/15 09:13am Class C Motorhomes
RE: Paralleling Yamaha 4500W and Honda 2000W

why was the lights changing? was the voltage all over the place? i would think when they sync, voltage and hertz would sync i personally think it will either work, or go into overload and protect the inverter.Naturally the voltage would have to be changing for the lights to vary in brightness. The Outback inverter was running off of battery and can change its contribution to the output instantly. The Honda has a ramp-up/ramp-down delay. I'm "assuming" the two devices were in a slow oscillation loop trading off which one carried most of the load. The Outback's output is around 122 volts steady, the Honda's is 128 volts under lighter loads, ramping down to 120 as the load gets heavy. When the Outback inverter sees a higher voltage than it's producing its bi-directional H-bridge turns into an unregulated battery charger. When I realized I had the outputs cross-connected, I broke the connection without any investigation. A couple of factors here aren't present with generators only.
Wayne Dohnal 12/28/14 09:15pm Tech Issues
RE: Paralleling Yamaha 4500W and Honda 2000W

My best hopefully educated guess, taking absolutely no responsibility if anything is damaged: 1. They will sync. 2. Because of the different design voltages, the Honda will carry all of the load, up to and possibly past its rated continuous load, before the Yamaha begins picking up any of the load. I wouldn't try it myself unless the value of knowing what happens is more that the cost of at least one new inverter. As a comment, I have accidentally paralleled my eu2000i with an Outback inverter (during a power outage). Nothing broke, and it took me a while of watching the lights in the house changing brightness until I figured out what was happening.
Wayne Dohnal 12/28/14 01:32pm Tech Issues
RE: Opinions on Kaspersky AV

The best antivirus protection IMO is to make sure you're not running in Administrator mode.
Wayne Dohnal 12/25/14 07:22pm Technology Corner
RE: Champion voltage fluctuation

actually it appears roys photo's are wrong, that is not a Honda sine wave on the top, not sure. link below has a sine wave capture of a honda I'll agree. My eu2000i output isn't anywhere that dirty looking. Edit: Guess it got fixed. The referenced eu2000i photo looks fine now.
Wayne Dohnal 12/23/14 06:19pm Tech Issues
RE: Strange radio interference situation

Someone still listens to AM radio?I judge what I listen to by the content of its programming, not the wavelength of its signal.
Wayne Dohnal 12/06/14 07:08pm Tech Issues
RE: Running Two 20A loads from a single breaker

MOST RV'ers have NO clue. I am on the Sales/Service side of the RV. You have no idea how many times customers come in with complaints about overloading their 30 amp RV. Get the 50 amp service and then just use a 50 to 30 adapter with a 30 amp extension cord. It is BETTER to have MORE power to utilize than to NOT have that extra power and then grumble about it. DougI understand what you're saying and reluctantly accept it. I can't understand how RV'ers don't get it. It's not any more complicated than water tanks hold so many gallons, gas tank holds so much and you can go so many miles, etc. As I type this, it hits me that the examples I'm using all have gauges (sorry as they are for the water tanks). Maybe if the RVs came with a few electrical meters people would "get it" instead of being in the dark.
Wayne Dohnal 12/05/14 11:46am Tech Issues
RE: protection for car

Waste of time and money towed 40,000 miles in the past 5 years no problems with the Honda or the newer JeepWhy assume others will have the same result as you? On our first trip with the short overhang motorhome and a low to the ground car, there were hundreds of paint dings in the car's lower fascia. Protect-a-tow has mostly solved the problem except for occasional "leakers" at the edges.
Wayne Dohnal 12/03/14 09:49pm Dinghy Towing
RE: Running Two 20A loads from a single breaker

In todays market with the multitude of 120 appliances, RVer's should NEVER buy a 30 amp RV, they should insist on the 50 amp RV. Just opinion here. I get along just fine with 30 amps and would rather not wrestle with the heavier shore cord. I've got a 50 amp cord for backup generator power in the house, and it's a beast compared to the 30 amp cord.
Wayne Dohnal 12/03/14 03:22pm Tech Issues
RE: Running Two 20A loads from a single breaker

My motorhome came from the factory with this device (but made by Intellitec) wired to the microwave and water heater. It's fairly common in 30 amp rigs.
Wayne Dohnal 12/03/14 10:13am Tech Issues
RE: PI power mgnt system w/Honda generator.

Many eu2000i users have bonded the output to the generator's ground. Here's one of several threads discussing it. Picture of one way to do it on page2. http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27867996
Wayne Dohnal 11/29/14 11:49pm Tech Issues
RE: Generator fried microwave after gen shut down several times

Download a service manual here. It has a page for code 12 troubleshooting. http://www.cumminsonan.com/www/pdf/manuals/981-0530C.pdf
Wayne Dohnal 11/24/14 04:34pm Tech Issues
RE: Generator fried microwave after gen shut down several times

Just an educated guess. The microwave is an "unfriendly" load for the generator, with its current draw not directly following the voltage waveform. The circuit breaker reacts to time-averaged current, while there might in reality be very short current spikes many times the breaker value that don't result in a trip. There could be a weak link anywhere in the generator circuitry that can't handle the short current spikes, followed by a protection mechanism detecting it and shutting the generator down. Could also be a problem with the voltage regulator being confused by the unfriendly load, too. Not knowing the Onan internals in any detail, I'd have to say the problem could be with almost anything in the generator part. My first shot in the dark would be to make sure all the electrical connections are tight, clean all of the connectors, and reseat plug-in circuit boards if there are any.
Wayne Dohnal 11/24/14 03:04pm Tech Issues
RE: Generators, do you get what you pay for?

You didn't say what the load for the test was. If was a resistive load like a portable heater, try it with a more unfriendly load like an air conditioner or power converter with a somewhat heavy load. If the waveform still looks good with those loads you have found yourself an above average conventional generator. For comparison, here's a picture of an Onan Microquiet running a fully loaded PD9160A converter (voltage trace on top, current on bottom): http://i852.photobucket.com/albums/ab86/tigerwillow1/Onan_PD_fullLoad.jpg
Wayne Dohnal 11/24/14 10:37am Tech Issues
RE: Generator Question

Good chance it's a gummed-up carburetor. In that situation they usually just run rough with the choke off, but I could envision it dying completely with a severe gumming-up. Sometimes running a while with Seafoam in the gas will clear it up, other times the carb has to be taken apart and cleaned. See the first sticky thread in Tech Issues for more info.
Wayne Dohnal 11/24/14 12:00am Tech Issues
RE: Where did you get your Electrical knowledge?

I want to second Salvo's comment about the microcomputers. If you don't have the resources to do custom chip and/or circuit board design, this is where the action is. I have a good RV example. I wanted to add a trans temp gauge, which has little or no availability for the Sprinter chassis. The trans has an internal temp sensor with a voltage output proportional to the temperature. The sensor voltage can be converted to a voltage for direct voltmeter temperature readout with a linear equation, a perfect job for a simple analog computer op amp circuit. I tried and failed to get it to work reliably. I think it had to do with needing highly stable resistors, the physical layout, and good shielding. Embarrassed (still) I went to plan B, an ATmega development board for $20 plus a programmer device for $35. Added a precision voltage source for the on-chip A-D converter (a magic chip), an rs232 level converter (for the display, another magic chip), and a bit of software. Works like a champ with none of the analog circuit idiosyncrasies to fight with. Adding a couple of push buttons for mode and brightness control didn't require ripping it up and starting over. For many things, this is the only way to go these days.
Wayne Dohnal 11/22/14 02:29pm Tech Issues
RE: Chasing electrical gremlins - GFCI outlet puzzle

I'll jump on the bandwagon of saying there's more to this than meets the eye. The way the GFCI outlets are mass produced as identical devices, I think the odds of one being able to reverse the hot and ground are astronomical. Coupled with the previous observation that the ground goes 'to', rather than 'through' the outlet, the odds are astronomical-squared. The outlet tester gives a possible interpretation of the pattern of lights, not a definitive answer. With 2 lights lit in the 'hot-ground reversed' pattern, it's indicating voltage between ground-neutral and ground-hot. Another cause of this indication would be 'neutral connected to hot', which I believe would be consistent with your measurements and observations. While I still find it unlikely that the outlet would do this, the odds are IMO somewhat less than astronomical. There are probably other causes of the outlet tester's indication, too.
Wayne Dohnal 11/22/14 12:01pm Tech Issues
RE: Where did you get your Electrical knowledge?

Ham radio, ~50 Heathkits, minicomputer research assistant in college, EE degree, 40+ years work in electronics, destroyed 10% of broken things attempting to fix them, destroyed 20% of working things trying to modify or enhance them. The lessons learned from the sparks and smoke are the ones best remembered. Things are different for a younger person now. Devices are so miniaturized that they're close to impossible to work on. You can't look at something to get an idea of how it works. No more looking at a radio or tv and discovering things like the rf section, if section, deflection yoke, high voltage supply, etc. It's all in magic chips now. For the most part, you're a chip designer or you're clueless.
Wayne Dohnal 11/22/14 11:38am Tech Issues
RE: Kill a watt, how accurate?

I have 2 of the P4400s and have found both to be surprisingly accurate after cross-checking them with a few other measuring devices including a revenue meter. Many light bulbs and heaters don't come very close to their advertised wattage, plus you have to know what voltage they're rated at to even know what to expect. As an example, while the standard rating voltage is 115, almost all hair dryers are rated at 125 volts. Because of this "nobody" will ever get the rated performance, but the higher wattage looks good in the advertising. The only places I've found the P400 lacking are the frequency and power factor readings with "modified sine wave" power. Even with MSW, the other functions give what looks to be good true RMS readings.
Wayne Dohnal 11/15/14 09:17am Tech Issues
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