[Amps] FW: Power factor correction on tube amps

[Carl]

But yet a choke input filter will show nasty leading spikes on a scope when 
used in a pulsed mode such as CW and SSB. It is especially harsh with SS 
rectifiers and is somewhat muted with 866A/3B28's.
I suspect a little bit more reading on the subject is in order as this wasnt 
taught in the magnetics portion of my EE classes.

Carl
KM1H


----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <amps at contesting.com>
Sent: Thursday, March 07, 2013 10:08 PM
Subject: Re: [Amps] FW: Power factor correction on tube amps


> On 3/7/2013 6:26 PM, KA4INM wrote:
>> So you are saying our tube HPA's hV power supplies have a near unity 
>> power factor?
>
> No, I said exactly the opposite. If it's a capacitor input filter, the 
> current is drawn in pulses and thus has high harmonic content. A choke 
> input filter would reduce that effect.
>
> 73, Jim K9YC
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