[Amps] placement of RF choke bypass cap.

[Frank T Brady]

Gary,
Is anyone evaluating the test to account for the capacitance?
I'm sure I'm not the only one fascinated by this skin effect 'proof test'
It's beginning to sound like one of those relativity paradoxes that
can't be observed without the observation changing the behavior <g>
73, frank w0ecs

On 3/22/2010 12:06 PM, Gary Schafer wrote:
> You are drawing a conclusion without knowing all the information needed. The
> disk on the antenna acts like a capacitor to the rest of the antenna.
> Read a little on how an antenna works. It depends upon the capacitance
> between ends for return current.
> Placing the disk in line only looks like a fatter element at that point
> which means more capacitance.
>
> 73
> Gary  k4FMX
>
>    
>> -----Original Message-----
>> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]
>> On Behalf Of pc5m, Carel
>> Sent: Sunday, March 21, 2010 1:03 PM
>> To: amps at contesting.com
>> Subject: Re: [Amps] placement of RF choke bypass cap.
>>
>> Bill,
>>
>> You are right !
>>
>> Changed my setup and to summarize the results:
>>
>> #1. With the disk, Fres = 480 MHz
>> #2. With disk connected parallel to horizontal wire (see
>> www.pc5m.com/skineffect2.jpg ). Fres = 260 MHz
>> #3. With disk connected in between (no through wire at all) ( see
>> www.pc5m.com/skineffect1.jpg) . Fres = 260 MHz
>>
>> I suppose I can only conclude that the RF current will/must go through
>> the
>> disk and not follow the long path (due to alleged skineffect) around the
>> disk.
>>
>> Again a myth busted ?
>>
>> Gl, Carel.
>> ---------------------------------------------
>>
>> ORIGINAL MESSAGE:
>>      
>>> Try this: Measure the spacing from the bottom edge of the disk to the
>>> ground plane, then re-solder the disk at the edge of the disk,
>>> maintaining the same spacing. Now the disk is acting as just a
>>> capacitor, without having the wire's RF flowing through it.
>>>
>>> 73, Bill W6WRT
>>>        
>>
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>      
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>