[ARC5] Collins xfmr ratings
kgordon2006 at frontier.com
kgordon2006 at frontier.com
Fri Aug 15 11:18:59 EDT 2014
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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