[Amps] Alpha vs. Henry

[Carl]

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)
>>>
>>>