[TowerTalk] Power Rating of Johnson 229-203 28 uH. roller inductors

kd4e kd4e at verizon.net
Mon Jul 10 09:31:25 EDT 2006

>> I have been asked if the pair of Johnson 229-203
>> 28 uH roller inductors I have posted for sale
>> would handle an antenna tuner at 1000 watts AM
>> from a BTA-1R2.
>> It is my belief that except for an absurdly wild
>> SWR (I am thinking really low) these rollers should
>> be fine.
>> WDYT?
> I wouldn't be too sure about that.  You can have an awful lot of current 
> running in a coil in an antenna tuner.  We used to pull 6 inch arc's off 
> coils (don't try this at home) in a KW setup.  I have melted some of those 
> B&W coils stock coils in a tuner. 73
> Tom W7WHY

One can toast just about any tuner if one exposes it
to radical extremes.

To narrow the question:

Within the range of reasonable SWR's in a properly
constructed balanced balanced tuner is not the
Johnson 229-203 28 uH roller inductor a reasonable
choice for a full-legal antenna tuner?


Thanks! & 73, doc kd4e

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