[Amps] plate choke

[Will Matney]

On 8/26/05 at 1:15 PM R.Measures wrote:

>On Aug 26, 2005, at 8:18 AM, Will Matney wrote:
>
>>
>>
>> *********** REPLY SEPARATOR  ***********
>>
>> On 8/26/05 at 3:41 AM R.Measures wrote:
>>
>>> On Aug 25, 2005, at 9:33 PM, KD7QAE wrote:
>>>
>>>> So,  many of the plate chokes I have seen described in home brew
>>>> amplifiers and those in use in Ameritron, Henry, Alpha and QRO are
>>>> single layer wound solenoids, many like the one I built.  These do 
>>>> not
>>>> exhibit resonant peaks (High Z) in the ham bands as far as I can tell
>>>> based on my limited experience.
>>>
>>> A single-layer choke of up to c. 60uH will exhibit no resonances below
>>> approximately 35MHz, however, larger chokes will.
>>
>>
>> Not in the normal ham bands I doubt it.
>
>I measured such chokes and I did not find any resonances below about 
>35MHz. .
>
>> I have seen them though, well lets say in other places close. However 
>> a choke for that frequency


These were Ohmite Z-14 (The orange ones) chokes that I recall and had a RS around 23 MHz.

>
>Which frequency?


They were used at 27 MHz but found the SR at 23 MHz with a dip meter.


>...
>Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
>
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