Larry,
This is true that toroids with partial windings used are fine - if the core
power dissipation and local flux density limits don't exceed the capability
of the core.
For a project here, I would be most interested to know if this can somehow
be determined by observation alone?
Thanks
73/jeff/ac0c
www.ac0c.com
--------------------------------------------------
From: "Larry Benko" <xxw0qe@comcast.net>
Sent: Monday, August 02, 2010 12:05 PM
To: <amps@contesting.com>
Subject: Re: [Amps] New HF amplifier
> What are you using as the basis for this blanket comment? There is
> absolutely nothing wrong with tapped toroids. What causes problems is
> treating them as is usually done for air core coils which have the
> unused turns shorted out. On a toroid you do NOT short out any turns if
> some of the turns are active. Otherwise you get significant loss and
> heating in the toroid.
>
> Larry, W0QE
>
> Dennis OConnor wrote:
>> Tapped toroids show that the designer was too cheap to do the job
>> right...
>>
>> Built cheap, for the cheap! Move along folks, nothing to see here... Move
>> along... Keep moving...
>>
>>
>> denny / k8do
>>
>>
>>
>>
>> _______________________________________________
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>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
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