[ARC5] Collins xfmr ratings
D C _Mac_ Macdonald
k2gkk at hotmail.com
Fri Aug 15 11:23:41 EDT 2014
I'm just WAGing that a bleeder load of 10% or maybe even 5% of the total current would do that, Ken.
* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* k2gkk hotmail com *
* Oklahoma City, OK *
* USAF & FAA (Ret.) *
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> From: kgordon2006 at frontier.com
> To: ARC5 at mailman.qth.net
> Date: Fri, 15 Aug 2014 08:18:59 -0700
> Subject: Re: [ARC5] Collins xfmr ratings
>
> On 15 Aug 2014 at 10:03, D C _Mac_ Macdonald wrote:
>
> > Somebody asked what would be an "adequate bleeder." It's been many
> > years since I looked up that sort of information, but I'd say that a
> > 20k, 25W resistor would work just fine. That bleeder would draw 25 mA
> > and result in a 12.5 Watt draw. You might want to go with 40k @ 10W
> > to drop to a 12.5 mA and 6.25 Watt draw. The latter would certainly be
> > more than adequate as a "safety" bleeder.
>
> We aren't talking here about a "safetly bleeder", Mac: we are talking about one that will
> maintain "critical inductance" at low loads.
>
> Look it up.
>
> A choke input filter needs enough of a load on the output that the inductance of the
> choke will remain high enough that the choke acts like a choke, and not a "wire".
>
> Ken W7EKB
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