[Amps] Rf choke

Kenneth D. Grimm, K4XL kgrimm at adelphia.net
Mon Nov 21 17:07:10 EST 2005


R.Measures wrote:

>On Nov 21, 2005, at 12:08 PM, wc6w at juno.com wrote:
>
>  
>
>>Hi Jan,
>>  The theory behind those "sectioned" chokes is that all the 
>>resonances will fall somewhere friendly.  In the real world they tend 
>>to behave rather similar to contiguously wound solenoids.
>>    
>>
>
>In my experiences, this was also the case, Marv.  The notion that two 
>choke sections can be decoupled by placing them end-to-end instead of 
>at right angles is quite laughable.
>
>cheers
>
>  
>
>>  For some background info on plate parallel feed RF chokes and 
>>alternative solutions see:
>>
>>http://wc6w.50webs.com/wc6wamps/index.html?fr62.html
>>
>>73 & Good afternoon,
>>  Marv WC6W
>>
>>
>>-- jan <jan at on6zg.be> wrote:
>>Hi,
>>
>>I´m building a HF gs35b amplifier, but i´m having a problem with the rf
>>choke in the High voltage line.
>>On 15meters the choke gets hot.
>>Has anyone got specifications for building a 160m to 10m rf choke? I´ve
>>found several amps with a choke like this inside:
>>http://www.kvindesland.no/yl2qm/images/rfc.gif
>>
>>thanx for any help
>>ON6ZG, Jan
>>
OK, now on behalf of us non-cognoscenti, are you guys saying that the
segmentation of a solonoidal plate choke cannot be wound so as to
avoid resonances at undesired frequencies? 

I don't want to waste my time trying to wind a new choke for my amp that
does unhappy things every time I try to use it on 24 MHz if it is a 
known fact that
segmentation doesn't work. 

Anyone want to guarantee this?  :-)

73,

-- 

Ken K4XL
k4xl at arrl.net

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