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Re: [Amps] Power transformer for 600 watt rig

To: <>, "'Pat Barthelow'" <>, "'Jim Tonne'" <>, "'Amps'" <>
Subject: Re: [Amps] Power transformer for 600 watt rig
From: "Barrie Smith" <>
Date: Tue, 18 Mar 2008 12:55:06 -0700
List-post: <">>

> Hi Pat,
> The biggest problem with a choke input filter is the transient response of
> the choke with SSB. It will allow the voltage to dip quite a bit on some
> the voice peaks as the amplifier demands current. A supply with no choke
> doesn't have those kind of problems. A tuned choke on the other hand will
> act like a capacitor input filter and will not have the transient problems
> either.
> 73
> Gary  K4FMX

Speaking of tuned-chokes:  I've built several power supplies over a many
year period using this method.  Some worked well, some didn't.  I've always
used the method that I thought was the only method, where the cap was in
parallel with the choke.

Recently, I came across another scheme where the cap is in series with the
choke.  Both the choke and the cap are in series from B+ to ground.

Anyone know anything about this method?

73, Barrie, W7ALW

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