Hello everybody:
I have around 10 yellow toroids 40 millimeter outer diameter made by
Micrometals. I can stack as many as I want. The following questions:
How high in frequency can they be used?
Will they be linear and not generate additional harmonics?
Will there be fewer turns for a given inductance when you stack toroids? If
so, can I not just series tune the coil to get a kind of roller coil
substitute?
How much power can they be used for?
73s de Hans SM5KI
----------
>Från: "Phil Clements" <philk5pc@tyler.net>
>Till: "Maurizio Panicara" <i4jmy@iol.it>, "Pino giles" <vk3wu@hotmail.com>,
<amps@contesting.com>
>Ämne: Re: [AMPS] broadband L at output
>Datum: tor 20 jan 2000 23.12
>
>
>> I don't find a very good idea to place a power broad band transformer, with
>> a saturable core, where the impedance is high.
>>
>> 73,
>> Mauri I4JMY
>
>Since 160 meters came into play in amplifiers in the '80's, Alpha and
>many others are using powdered iron torroid stacks to keep the package
>smaller. Care must be taken, as in the plate choke area to over-engineer
>the stack of torroids. They work fine as both the pi and the L coils if big
>enough wire and enough iron is in the stack.. An added bonus is that they
>can be placed in areas of the RF deck close to metal and other components
>without any interaction or change in L. A quick feel of the torroid after
>several minutes of key-down will tell you if it is large enough for the power
>being run through it. A stack of three large yellow powdered iron torroids
>wound with #10 awg wire will loaf @ the 5kw level.
>
>(((73)))
>Phil K5PC
>
>
>>
>
>
>
>--
>FAQ on WWW: http://www.contesting.com/ampsfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|