[Amps] Plate Choke Resonances

[James Colville]

You didn't.

 I came up with the same results. A big fat resonance in the middle of 20
meters. I posted my results a few weeks ago here on the list. I think
Ameritron uses #29 wire. I have my re-wound choke here and an original
Ameritron. Mine was about 190uH and the genuine Ameritron is 225 or 250 uH.
Don't remember which now.


73
Jim W7RY


On Thu, Jan 28, 2010 at 6:23 PM, Tim Long <tlong8 at earthlink.net> wrote:

> Thanks Jim.  Didn't measure inductance.  Followed the data that Carl
> provided as closely as I could, turn-for-turn.  Used AWG #28.  I expected to
> get a clone of the Ameritron.  Don't know if I did or not.
> 73, Tim, W2UI
>
> James Colville wrote:
>
>> What is the measured inductance?  What sixe wire did you use?
>>  73
>> Jim W7RY
>>
>>
>>  On Thu, Jan 28, 2010 at 8:09 AM, Tim Long <tlong8 at earthlink.net <mailto:
>> tlong8 at earthlink.net>> wrote:
>>
>>    Hello All,
>>    I just finished winding a homebrew Ameritron-copy plate choke
>>    using the
>>    details provided by Carl.  Thanks to Carl's patience and magnifying
>>    glass.  Shorting the choke and with a grid dip meter, I observe
>>    resonances at 14.380MHz, 18.200MHz, and 41.5MHz.  I assume that the
>>    resonance at 14380 will be problematic, or will the resonance
>>    shift far
>>    enough away once the choke is installed?  Experience please.  Thanks &
>>    73, Tim, W2UI
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