[ARC5] [Milsurplus] Cold Filament Inrush Current

[Kenneth G. Gordon]

On 15 Mar 2018 at 16:28, Michael Clarson wrote:

> Wasn't the original post about command set rcvrs? These were used in
> planes running on batteries. The filaments were hit with a solid 24
> volts when turned on, and, they would last quite a while. Inrush
> current did not seem to be a concern. --73, Mike, WV2ZOW

Yes, but remember, all of that WWII war-time equipment was expected to be expendable.

The fact that some of us are using the stuff +70 years after their manufacture was never, 
ever, envisioned by the designers.

Therefore, filament inrush was never considered a problem. The equipment was expected to 
be gone long before now.

Ken W7EKB

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