[Amps] Alpha vs. Henry

[Gary Schafer]

Not according to Collins. They say that the choke should be resonant at 120
Hz with minimum critical current, eg bleeder current, which keeps voltage
from soaring. 

As current draw increases the inductance of the choke will drop, going out
of resonance and increasing ripple voltage out of the supply.

73
Gary K4FMX

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]
> On Behalf Of Carl
> Sent: Sunday, April 03, 2011 7:14 PM
> To: Fern; amps at contesting.com
> Subject: Re: [Amps] Alpha vs. Henry
> 
> The choke/capacitor combination should be resonant at 15-20% above 120
> Hz.
> When the choke lets loose I dont know what the failure mode is but Henry
> amps do it often. Poor manufacturing tolerance on the choke inductance
> may
> be to blame, I cant measure them once they are fried.
> 
> Carl
> KM1H
> 
> 
> ----- Original Message -----
> From: "Fern" <crc at cyberlink.bc.ca>
> To: "Carl" <km1h at jeremy.mv.com>; "Roger (sub1)"
> <sub1 at rogerhalstead.com>;
> <amps at contesting.com>
> Sent: Sunday, April 03, 2011 3:45 PM
> Subject: Re: Alpha vs. Henry
> 
> 
> >I have two Henry amps with the 3K Classic and 3K Premiere (both export
> >versions) without that issue of choke talking back. I suspect that his
> >choke and capacitor may be off resonance.
> > Fern   VE7GZ
> >
> >
> > ----- Original Message -----
> > From: "Carl" <km1h at jeremy.mv.com>
> > To: "Roger (sub1)" <sub1 at rogerhalstead.com>; <amps at contesting.com>
> > Sent: Sunday, April 03, 2011 1:31 PM
> > Subject: Re: [Amps] Alpha vs. Henry
> >
> >
> >> Chokes dont like a heavy current with lots of ripple on it. Same with
> a
> >> modulation xfmr that passes DC in the secondary, they like to talk
> back
> >> to
> >> you.
> >>
> >> Carl
> >> KM1H
> >>
> >>
> >> ----- Original Message -----
> >> From: "Roger (sub1)" <sub1 at rogerhalstead.com>
> >> To: <amps at contesting.com>
> >> Sent: Sunday, April 03, 2011 2:42 PM
> >> Subject: Re: [Amps] Alpha vs. Henry
> >>
> >>
> >>> On 4/3/2011 12:48 PM, Carl wrote:
> >>>> Tuned PS filter choke
> >>>
> >>> I had a 2K4 that would get pretty noisy when loaded to tilt as well.
> >>>
> >>> 73
> >>>
> >>> Roger (K8RI)
> >>>
> >>>
> 
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