[Elecraft] Ameritron 240V inrush limiter: any benefit on a KPA500?

[K9MA]

> On 1/18/2020 12:14 PM, Victor Rosenthal wrote:
>> The power switch in some of those amps like the SB220 or TL922 is 
>> highly stressed. T

Another cause of high input current is transformer saturation. If the 
core happened to be fully magnetized in one direction when last turned 
off, and the AC happens to want to magnetize it more in the same 
direction at turn-on, the core can saturate for half cycle. It's a 
random event, which doesn't happen often, but it's hard on switches. It 
can also make that "bong" sound at turn-on.

73,

Scott K9MA

-- 
Scott  K9MA

k9ma at sdellington.us