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Search: Posts Made By: dereckbc
Forum: General Electric Discussions 03-24-2015, 04:23 PM
Replies: 64
Views: 776
Posted By dereckbc
No problem Nigel relax my friend all is good. I...

No problem Nigel relax my friend all is good. I was not trying to be hard on on you or Marine batteries. I apologize if I came off that way. I was just pointing out and letting folks know that...
Forum: General Electric Discussions 03-24-2015, 12:35 AM
Replies: 64
Views: 776
Posted By dereckbc
Not true Nigel. Trojan started in 1925 just after...

Not true Nigel. Trojan started in 1925 just after WW-II and has been a US owned company private company every since. They do not make batteries under any other label like Interstate, Johnson...
Forum: General Electric Discussions 03-23-2015, 07:40 PM
Replies: 64
Views: 776
Posted By dereckbc
You shouldn't. FLA batteries fall into one...

You shouldn't.

FLA batteries fall into one of three categories.

SLI or Starting Lighting & Ignition aka Starting or Cranking Batteries are designed to deliver very high short burst of current...
Forum: General Electric Discussions 03-23-2015, 02:15 AM
Replies: 64
Views: 776
Posted By dereckbc
Tap the breaks a minute. The panels are fine, the...

Tap the breaks a minute. The panels are fine, the controller is PWM.

With PWM controllers Output Current = Input Current. The Renogy solar panels Imp = 5.29 amps and when wired in parallel yield...
Forum: General Electric Discussions 03-22-2015, 09:32 PM
Replies: 64
Views: 776
Posted By dereckbc
Look the Harbor Fright panel kits cost $190 ...

Look the Harbor Fright panel kits cost $190 (http://www.harborfreight.com/45-watt-solar-panel-kit-68751-8527.html)and when connected their POS controller delivers 2.5 amps at solar noon. At 12 volt...
Forum: General Electric Discussions 03-22-2015, 06:45 PM
Replies: 64
Views: 776
Posted By dereckbc
Gunny here is what I recommend. Solar is very...

Gunny here is what I recommend. Solar is very limited and expensive. For a mobile system operating at 12 volts for 1 watt of panel can only support roughly .75 AH of battery depending on which type...
Forum: General Electric Discussions 03-22-2015, 05:52 PM
Replies: 64
Views: 776
Posted By dereckbc
Sorry guy, but don't buy that kit from Harbor...

Sorry guy, but don't buy that kit from Harbor Fright. The box it comes in is worth more than what comes inside of it. I design/build a lot of off-grid solar systems professionally for cellular...
Forum: Off Topic Chit Chat 03-21-2015, 04:37 PM
Replies: 16
Views: 298
Posted By dereckbc
Nigel that just means you are a Passive...

Nigel that just means you are a Passive Aggressive Troll. :D

I understand what you are saying, I have some of the same troubles with comments especially about batteries / power / charging made...
Forum: Batteries & Chargers 03-21-2015, 04:28 PM
Replies: 9
Views: 143
Posted By dereckbc
You did not say what C-Rate they have but those...

You did not say what C-Rate they have but those numbers are OK, not great, but acceptable. I have a few Hyperion CX G3 3S 2100 ma 25C batteries and when new measured 7-7-7 a year ago and now 10-10-10.
Forum: Batteries & Chargers 03-21-2015, 04:21 PM
Replies: 30
Views: 893
Posted By dereckbc
What AH rating are those 12S2P batteries?

What AH rating are those 12S2P batteries?
Forum: Beginners 03-21-2015, 04:15 PM
Replies: 22
Views: 340
Posted By dereckbc
IMO a very bad idea. A beginner does not have the...

IMO a very bad idea. A beginner does not have the skills to fly a glider which is basically what a solar powered plane is. A beginner needs some decent power to get out of trouble, especially during...
Forum: Power Systems 03-18-2015, 08:08 PM
Replies: 28
Views: 383
Posted By dereckbc
The Brass is there for mechanical strength or...

The Brass is there for mechanical strength or hardness.
Forum: Power Systems 03-18-2015, 02:23 AM
Replies: 28
Views: 383
Posted By dereckbc
I am not sure if you can find a supply house like...

I am not sure if you can find a supply house like Graingers, Cesco, or Graybar to buy small quantities but Thomas and Betts makes really good quality Bullet Connectors in their male...
Forum: Power Systems 03-18-2015, 01:04 AM
Replies: 28
Views: 383
Posted By dereckbc
Though tI would chime in because I see some good...

Though tI would chime in because I see some good and bad info being stated here. Not picking on anyone OK.

I have worked with battery plants all my professional career as a PE and worked with many...
Forum: General Electric Discussions 03-17-2015, 11:50 PM
Replies: 22
Views: 284
Posted By dereckbc
You can especially if you do not like the smaller...

You can especially if you do not like the smaller battery and looking to get it replaced at your expense.
Forum: General Electric Discussions 02-24-2015, 04:38 AM
Replies: 18
Views: 369
Posted By dereckbc
USA TV manufacturing died after WW-II. TV...

USA TV manufacturing died after WW-II. TV manufacturing went to Japan. Now Japan has lost it to China.

Story is the same. USA wages, taxes, and employment policies became too expensive. Japan...
Forum: General Electric Discussions 02-24-2015, 04:30 AM
Replies: 18
Views: 369
Posted By dereckbc
Electronic Component stores died a long time ago...

Electronic Component stores died a long time ago with Bench Technicians. I am a ham radio operator and electrical/electronic engineer. In my college days and early career I fixed a lot of commercial...
Forum: Humor 02-20-2015, 09:20 PM
Replies: 16
Views: 2,150
Posted By dereckbc
Chinese Lanterns can stir up quit a bit of chaos...

Chinese Lanterns can stir up quit a bit of chaos and fun. Done in the right places you can get F16 USAF jets to scramble and fly over, and cops chasing lights in the sky with sirens blasting...
Forum: Electric Ducted Fan Jets 02-17-2015, 12:27 AM
Replies: 39
Views: 915
Posted By dereckbc
The scale just changes and means you need a real...

The scale just changes and means you need a real accurate DMM that can measure very small voltages accurately. You are getting into Fluke meters and away from Harbor Fright, Craftsman, and Chi-Com...
Forum: Electric Ducted Fan Jets 02-16-2015, 09:52 PM
Replies: 39
Views: 915
Posted By dereckbc
Was just an example. Just use Google or whatever...

Was just an example. Just use Google or whatever search engine you like and search for 100 AMP Shunt...
Forum: Electric Ducted Fan Jets 02-16-2015, 08:07 PM
Replies: 39
Views: 915
Posted By dereckbc
Hall effect Transducers are good when operating...

Hall effect Transducers are good when operating at full scale, but not so much on say 10 amps on a 100 amp scale. Close enough for what most want to know, but if precision is desired and within...
Forum: Electric Ducted Fan Jets 02-16-2015, 08:04 PM
Replies: 39
Views: 915
Posted By dereckbc
A Shunt is what is built into a watt meter or can...

A Shunt is what is built into a watt meter or can be external.

A Shunt is nothing more than a precision high power resistor, that develops 50 millivolts at full scale. For example a 50 amp shunt...
Forum: Electric Ducted Fan Jets 02-16-2015, 07:10 PM
Replies: 39
Views: 915
Posted By dereckbc
OK for a quick check, but does not read watts....

OK for a quick check, but does not read watts. You would need a volt meter to get that part.

I was just Stumped when someone mentioned Balance Batteries with a Watt Meter. Does not make since to...
Forum: Electric Ducted Fan Jets 02-16-2015, 06:35 PM
Replies: 39
Views: 915
Posted By dereckbc
Clamp meters are not real accurate and does not...

Clamp meters are not real accurate and does not measure voltage to extract watts or capable of measuring watt and amp hours. Only way to do wither accurately is with an In-Line meter that uses a...
Forum: Electric Ducted Fan Jets 02-16-2015, 12:29 AM
Replies: 39
Views: 915
Posted By dereckbc
OK being an EE I gotta ask what the BALANCE...

OK being an EE I gotta ask what the BALANCE FEATURE is on a watt meter. Does not make since to me right now. I am missing something. Balance to me is what a charger does, not a in-line watt meter.
Forum: UAV / FPV 02-15-2015, 04:24 AM
Replies: 6
Views: 261
Posted By dereckbc
Sorry did not mean it like it sounded, just...

Sorry did not mean it like it sounded, just frustration. Quads are giving the hobby a bad name lately. The general public and Big Brother view them as a threat to National Security and Privacy.
...
Forum: UAV / FPV 02-14-2015, 01:59 AM
Replies: 6
Views: 261
Posted By dereckbc
Another reason to ban RC Flying.

Another reason to ban RC Flying.
Forum: Batteries & Chargers 01-10-2015, 12:16 AM
Replies: 23
Views: 560
Posted By dereckbc
Simple throw them away and get a new ones. You...

Simple throw them away and get a new ones. You cannot work with Aluminum. That is why manufactures switched to prevent you from doing what you want to do.

Having said that you got nothing to...
Forum: Batteries & Chargers 01-09-2015, 10:36 PM
Replies: 9
Views: 246
Posted By dereckbc
As I have said in another thread I have another...

As I have said in another thread I have another expensive hobby, EV's. I have built a couple of racing type golf carts.

Ev guys don't use C-Rates to compare batteries because as you have...
Forum: Batteries & Chargers 01-09-2015, 10:27 PM
Replies: 9
Views: 246
Posted By dereckbc
No lower C rating would mean more Ri which means...

No lower C rating would mean more Ri which means more energy wasted as heat.
Showing results 1 to 30 of 413

 
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