[ARC5] Collins xfmr ratings

[Geoff]

A resistors power rating is in free air so doubling it in an enclosure is a 
very good idea.

Carl

----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: "KG4KGL" <kg4kgl at gmail.com>
Cc: "ARC-5 Mail List" <arc5 at mailman.qth.net>
Sent: Friday, August 15, 2014 12:59 PM
Subject: Re: [ARC5] Collins xfmr ratings


> On 15 Aug 2014 at 12:53, KG4KGL wrote:
>
>> Kenneth,
>>
>> I was tracking FB until the paragraph below. Are you saying the 10k 
>> bleeder
>> would only be consuming 25 watts, but a 50 watt resistor is used for a 
>> good
>> safety margin?
>
> Yes. I always figure that if a resistor is dissipating a certain amount of 
> power,
> doubling its capability is "safe".
>
> But YMMV. ;-)
>
> Possibly for a wire-wound "power" resistor, that would not be necessary, 
> but
> I've always been a "belt and suspenders" type anyway...
>
> Other folks here would know more about that aspect of power resistors than 
> I
> would.
>
> Carl or Bruce for instance.
>
> Ken W7EKB
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