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[AMPS] Edge wound .1-40 uH Variable from SSN - comments-?

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Subject: [AMPS] Edge wound .1-40 uH Variable from SSN - comments-?
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Date: Fri, 12 Feb 1999 14:34:14 -0500

On Fri, 12 Feb 1999 08:47:45 -0800 Rich Measures <>
>>Anyone with comments on the above mentioned inductor? How would this
>>thing work in a 
>>a. 3CX1500A7 amp
>>b. 3CX3000A7 amp
>>covering 160-10m ? Or should I wound again my own coil?
>For a 3CX3000A7, the approx. tank circulating current with a Q of 12.5 
>2.5A x 12.5 = 31A-rms.   Since contact dissipation is:  P=I^2 x R, 
>not 31A be a bit much to expect from 10A-rated contacts?.   
>-  later, Carsten

If you left a brick on the key and went to a movie,  maybe. I would also
suggest that 2.0A x 12.5 = 25A RMS would be more realistic. A Q=10 would
then give 20A RMS . 
In either case the SSB or CW duty cycle would be no problem. Add a little
air flow for more overhead and the RTTY types.   Were you not a big
proponent of air flow on tank circuits? Maybe only when it suits the

In the case of the SSN inductor the multiple rollers are the most
important step to reliability.

Later yourself

73  Carl  KM1H

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>R. L. Measures, 805-386-3734, AG6K,  
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