[Amps] step start

jim.thom jim.thom@telus.net jim.thom at telus.net
Mon Oct 2 10:46:58 EDT 2023


Date: Mon, 2 Oct 2023 16:42:10 +0300
From: Victor Rosenthal 4X6GP <k2vco.vic at gmail.com>
To: amps at contesting.com
Subject: Re: [Amps] step start

<Why do you want a soft start on either plate or screen voltage? What
<function does it serve?

<73,
<Victor, 4X6GP
<Rehovot, Israel
<formerly K2VCO

Switch on a B+ supply with a 93uf filter cap, with no step start, and you
will find out  quickly
why step start is typ used.

What's the DC resistance of the 1 H choke ?  You will want a HD bleeder on
the screen supply at all times.  If sized correctly, the combo of the HD
screen xfmr, choke, 200 uf cap + bleeder should provide ample screen
regulation  for SSB use.   The dynamic regulation should be ample for both
your proposed B+ and screen supply.

Jim   VE7RF


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