[AMRadio] Low Power AM?


rbethman rbethman at comcast.net
Sun Nov 23 17:51:14 EST 2008


Okay,

Please explain:
> Bob Macklin wrote:
>   
>> No Pete,
>>
>> I am saying to reduce the load capacitor and maintain the dip on
>>     
> the plate
>   
>> capacitor.
Now you say maintain dip with load capacitor.  I am indeed Polish, BUT 
you seem too JUST have contradicted what you said.

Bob - N0DGN


Bob Macklin wrote:
> When I say "maintain the dip" I mean I recheck the dip changing the load
> capacitor.
>
> Bob
> K5MYJ
> ----- Original Message ----- 
> From: "Peter Markavage" <manualman at juno.com>
> To: <amradio at mailman.qth.net>
> Sent: Sunday, November 23, 2008 2:34 PM
> Subject: Re: [AMRadio] Low Power AM?
>
>
>   
>> I must be missing something in your words Bob (DGN). If, after operating
>> at some plate current and RF output using a PI network, and now you want
>> to reduce output, why would reducing the loading and re-dipping the plate
>> capacitor (to return to resonance), become "non-resonant" unless the
>> words that Bob (MYJ) used, "maintain the dip" means that he doesn't
>> re-dip the final after a loading control change. Since the beginning of
>> (my) time, the last thing I always do in a tune up procedure is to dip,
>> or check the dip, of the final.
>>
>> Pete, wa2cwa
>>
>> On Sun, 23 Nov 2008 16:08:51 -0500 rbethman <rbethman at comcast.net>
>> writes:
>>     
>>> Bob,
>>>
>>> I'm NOT Pete.  He may feel insulted.  LOL
>>>
>>> You're using a PI network, NOT a link tuned system.  If you reduce
>>> loading, AND maintain plate dip, You will indeed reduse output AND
>>> go
>>> NON-RESONANT.
>>>
>>> This opens a whole other can of worms.
>>>
>>> Bob - N0DGN
>>>
>>> Bob Macklin wrote:
>>>       
>>>> No Pete,
>>>>
>>>> I am saying to reduce the load capacitor and maintain the dip on
>>>>         
>>> the plate
>>>       
>>>> capacitor.
>>>>
>>>> It's the same as reducing the coupling on a link coupled final.
>>>>
>>>> Bob
>>>> K5MYJ
>>>>         
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>>     
>
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>   

-- 
Bob - NØDGN



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