[Amps] Plate Choke Resonances

[Carl]

----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <Amps at contesting.com>
Sent: Saturday, January 30, 2010 1:06 PM
Subject: Re: [Amps] Plate Choke Resonances


> On Sat, 30 Jan 2010 12:55:43 -0500, Carl wrote:
>
>
>>----- Original Message ----- 
>>From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
>>To: <Amps at 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 at 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

Since the discussion was about a series resonance and the reasons for it, 
then I submit your reply was confusing at a minimum.

Carl
KM1H


>
>
>
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