[Milsurplus] BC-221

Kenneth G. Gordon [email protected]
Thu, 18 Dec 2003 11:33:18 -0800


On 18 Dec 2003 at 10:19, David Stinson wrote:

> Has anyone ever used a regulated DC supply for the BC-221 filaments?
> Results worth the work?

Hmmm....interesting thought. I have not found my BC-221 to 
be anything other than stable and accurate with AC on the 
filaments. However, there is a bit of hum in the headphones 
despite adequate filtering in the PS.

Ken W7EKB