Hmm..."something simple, working for years..."

I've been doing that for years with a different topology/method that is
also something simple:

Power Amp: Two switches...switch on the filaments first, then after an
appropriate delay - actually the sequence below for the Preamp, switch on
the rectifier/HV.

Preamp:? Two switches, two powerstats (variacs), one each in front of
filament and HV/rectifier trafos...

???? Filament switch ON, power up gradually with powerstat, then...

???? HV switch ON, count to 30 with fingers (:)), power up gradually with
powerstat

Works great, no PCBs, no other stuff (relays, time delay modules, etc.)!

Best, 73 etc.,

RC

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On Fri, 14 May 2021 08:10:14 -0700, "f1frv" <f1frv@...> wrote:
> hello
> Have a look for something simple, working for years...
> [1]
> 73s
> Dom
>
> Links:
> ------
> [1]
> [2] /g/duncanampspsud/message/60
> [3]
>
mailto:[email protected]?subject=Re:%20Re%3A%20%5Bduncanampspsud%5D%20Soft%20Start%20Option
> [4]
>
mailto:f1frv@...?subject=Private:%20Re:%20Re%3A%20%5Bduncanampspsud%5D%20Soft%20Start%20Option
> [5] /mt/81400426/90558
> [6] /g/duncanampspsud/post
> [7] /g/duncanampspsud/editsub/90558
> [8] mailto:[email protected]
> [9]
> /g/duncanampspsud/leave/8998765/90558/306449312/xyzzy