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Re: LF: Iron dust toroids and heating

To: Clemens Paul <[email protected]>
Subject: Re: LF: Iron dust toroids and heating
From: Chris Wilson <[email protected]>
Date: Thu, 25 May 2017 12:24:51 +0100
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Hello Clemens,


So  in simple terms, does this mean that it is to be expected that the
G3YXM  LPF  will  NOT  work correctly on the W1VD amp? If so, again in
simple terms please ;) , why?

http://www.wireless.org.uk/136rig.htm   (The "Base Staion" version.


Thanks Clemens!



Thursday, May 25, 2017, 11:35:52 AM, you wrote:

> Hi Stefan,

>>115 uH appears to be very much for 137 kHz. Not sure what type 
>>of filter you are using  

> Chris has provided this link several times
> http://www.w1vd.com/LPF.pdf

> You can contemplate this filter as two 3-pole T-type low pass filters in 
> series.
> Then every element has 50 Ohm reactance,one half of the inner coil L2 belongs
> to the first and one half belongs to the second part,hence +j100Ohm in sum.

> 73
> Clemens
> DL4RAJ 






-- 
Best regards,
 Chris                            mailto:[email protected]


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