On Sat, 30 Jan 2010 12:55:43 -0500, Carl wrote:
>----- Original Message -----
>From: "Bill, W6WRT" <dezrat1242@yahoo.com>
>To: <Amps@contesting.com>
>Sent: Friday, January 29, 2010 11:56 PM
>Subject: Re: [Amps] Plate Choke Resonances
>> ORIGINAL MESSAGE:
>>
>> On Fri, 29 Jan 2010 10:13:37 -0800, "Jim Brown"
>> <jim@audiosystemsgroup.com> wrote:
>>
>>>
>>>The principal resonance is a parallel resonance with
>>>its own stray capacitance. You should not have to short
>>>anything to see this.
>>
>> REPLY:
>>
>> The purpose of shorting is to find SERIES resonances with the grid dip
>> meter. You need to check for both parallel and series (i.e. with and
>> without the short).
>>
>> 73, Bill W6WRT
>Oh how true Bill! I was waiting for someone to catch that big error (-;
My comment was not an ERROR, but an observation. Of course you short it
to look for series resonances. Yes, you must look both ways. And I repeat
my recommendation to measure the impedance vs. frequency.
73,
Jim K9YC
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