[AMPS] Chokes and Dipping chokes?

[km1h@juno.com]

On Thu, 11 Mar 1999 22:44:06 PST "Bill Murphy" <zuluhe@hotmail.com>
writes:
>
>I have just completed several homebrew chokes, the question is what is 
>
>the most effective way to use a dip meter to check these chokes for 
>resonance. I have tried several coupling methods, but the dips change 
>
>depending on  how you couple the dip meter to the choke. I seem to get 
>
>very sharp 30>200mhz dips, but the <30 mhz seem weak. I am using 2 
>turn 
>coupling on the end of the choke, there is a 5" lead between the 
>coupling turns and the choke base. I noitice that if i direct couple 
>the 
>dip meter to the base of the choke the dips change freq. Maybe its 
>just 
>my pathetic Jap Dip meter. Any suggestions would be appreciated.

There should be no reason to use a coupling loop. The most accurate
method is to hold the GDO as far away and still get an indication. Use a
rcvr for calibration accuracy.
Some units couple better than others, the Kenwood is one of the better
imports. For a long term commitment to home brew, etc, chase down an old
Measurements Model 59.

73  Carl  KM1H


>
>Bill Murphy.
>yes still alive and well after my 4cx5000 conversion!
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