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

[Vic Rosenthal]

Just like the 1930s vintage Western Electric at WKOP when I worked there in the early 60s. When you turned it on, it went click-click-click-click BLANG.
Two tubes, 12 kV on the plates, about 1 amp plate current for 5 kW output.

Victor 4X6GP 

> On 19 Jan 2020, at 1:45, Fred Jensen <k6dgw at foothill.net> wrote:
> 
> 10 KW homebrew FM broadcast TX [not kidding -- KPFK 90.7 Los Angeles in the late 50's, 4 4-1000A's* in parallel driven by a 1 KW stage] had a step-start using mechanical time-delay relays.**  It limited the inrush current to the filter capacitors of the 5.5 KV plate power supply.  It was part of the power supply in the back room, not the PA.
> 
> 73,
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
> * I do *not* recommend 4 ea 4-1000A's in parallel at 90.7 MHz. Things got very hot.
> 
> ** Integrated circuits and microprocessors has not been invented then.  Actually, the transistor barely had been.
> 
>> On 1/18/2020 10:55 AM, Roger wrote:
>> NO amplifier needs inrush protection - it is the POWERSUPPLY that needs it
>> no matter how it is implemented.
>> So the answer is not an easy "NO" or "YES" but a definite "it depends"!
>> 
>> Roger, DL5RBW
>> 
>> 
> 
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