[Amps] Alpha vs. Henry

[Carl]

Collins included that book with the URC-32 docs. I still have it from my 
60's Navy days.

Carl
KM1H




----- Original Message ----- 
From: "Gary Schafer" <garyschafer at comcast.net>
To: "'Carl'" <km1h at jeremy.mv.com>; "'Fern'" <crc at cyberlink.bc.ca>; 
<amps at contesting.com>
Sent: Sunday, April 03, 2011 10:26 PM
Subject: RE: [Amps] Alpha vs. Henry


>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 at jeremy.mv.com]
>> Sent: Sunday, April 03, 2011 9:29 PM
>> To: garyschafer at comcast.net; 'Fern'; amps at 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 at comcast.net>
>> To: "'Carl'" <km1h at jeremy.mv.com>; "'Fern'" <crc at cyberlink.bc.ca>;
>> <amps at 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 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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>> >> Amps at contesting.com
>> >> http://lists.contesting.com/mailman/listinfo/amps
>> >
>
>