[AMPS] Fw: ICAS rating confusion.

[Bob Duckworth]

Tom-

Thanks for writing.

Perhaps you could give me a little more info.

When you say to the transformer maker
"ICAS 50% duty cycle with maximum load period 5 minutes"
how does he translate this to core and wire size?
Also, how does this translate into the advertised specs for the amp.

I get real confused reading the manufacturers specs when
comparing amps. They seem to all use the same language
but it doesn't necessarily mean the same thing. 

Thanks,
-bob


----------
| From: Tom Rauch <w8ji@contesting.com> 
| 
| > Just what is ICAS rating when compared to CCS.
| > Is there an agreed upon standard? 
| 
| 
| I haven't seen a standard for ICAS. The rating difference is a DUTY 
| CYCLE rating change, not a current rating change. In other words, 
| if you draw 800 mA from a bridge you spec the transformer for 800 
| mA dc load with a bridge rectifier and then say something like 
| "ICAS 50% duty cycle with maximum load period 5 minutes". If 
| you don't spec it in detail, the transformer will be underbuilt or 
| overbuilt for some load conditions.
|  

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