[TowerTalk] Tuners

[Ragnar Otterstad]

: 
: > In my experience the rotary switch is a weak point in tuners, supposed
to
: > handle 2-3 KW.
: 
: The only requirement is that the RF switches have to exceed the 
: absolute breakdown voltage of the capacitors by a reliable safety 
: margin. That's true for all the RF switches in the tuner.
very same tuner that will handle 1500 watts when properly 
: adjusted (using maximum C that allows matching the load) can fail 
: with a hundred watts or less if improperly adjusted (using maximum L 
: and miniumum C)!
: 


My problems in the past have been related to high currents, which would
dictate a low contact resistance of the wafer switch.   Not all switches
can" take the heat ".

73   Rag  oz8ro

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