I think that it was in the Collins Fundamentals of single side band. I
looked again briefly and didn't see it so it might have been in another of
their publications.
By the way this book is an excellent read. It is like a radio handbook that
includes side band theory, antennas, propagation etc.
http://www.collinsradio.org/Archives/Fundamentals_of_Single_Side_Band.aspx
73
Gary K4FMX
> -----Original Message-----
> From: Carl [mailto:km1h@jeremy.mv.com]
> Sent: Sunday, April 03, 2011 9:29 PM
> To: garyschafer@comcast.net; 'Fern'; amps@contesting.com
> Subject: Re: [Amps] Alpha vs. Henry
>
> Where does Collins say that and use it? Or are they just quoting old HB
> tripe or is it vice versa?
>
> I suppose that with components that are sized for the peak voltages
> encountered it might work but that likely would exceed the cost and size
> savings of less inductance.
>
> W8JI did a bit of testing on the subject and so have others with the
> higher
> frequency being the result where there are no fireworks with "normal"
> sized
> components.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Gary Schafer" <garyschafer@comcast.net>
> To: "'Carl'" <km1h@jeremy.mv.com>; "'Fern'" <crc@cyberlink.bc.ca>;
> <amps@contesting.com>
> Sent: Sunday, April 03, 2011 9:00 PM
> Subject: RE: [Amps] Alpha vs. Henry
>
>
> > 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@contesting.com [mailto:amps-
> bounces@contesting.com]
> >> On Behalf Of Carl
> >> Sent: Sunday, April 03, 2011 7:14 PM
> >> To: Fern; amps@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@cyberlink.bc.ca>
> >> To: "Carl" <km1h@jeremy.mv.com>; "Roger (sub1)"
> >> <sub1@rogerhalstead.com>;
> >> <amps@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@jeremy.mv.com>
> >> > To: "Roger (sub1)" <sub1@rogerhalstead.com>; <amps@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@rogerhalstead.com>
> >> >> To: <amps@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)
> >> >>>
> >> >>>
> >>
> >> _______________________________________________
> >> Amps mailing list
> >> Amps@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/amps
> >
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