[Elecraft] KX3 - New 100 watt amp

[Robert Friess]

Stan,,

An amplifier needs some means of knowing when to switch from receive mode to
transmit mode.  This is almost universally accomplished by providing a
connection which when pulled to ground causes the amplifier to switch modes.
 This is usually labeled "Key In".  Most transceivers provide a contact
closure or a transistor switch to control this key line.  It will usually be
labeled "Key Out" The KX1 does not provide a Key Out connection and would
have be modified to provide the necessary function.

The KXPA100 is a linear amplifier and will work very well at 3.8 watts or
any other lower drive power.  The output power will be approximately 20
times (13 dB Gain) the input power up to 100 watts output.

73,

Bob, N6CM

On Thu, May 19, 2011 at 6:21 PM, stan levandowski <sjl219 at optonline.net>wrote:

> Bob, what do you mean by "key out" line?  I have never owned an amplifier
> so I'm not familiar with that term in that context.  Also, is 5 watts the
> drive level required to get 100 watts output or is 5 watts the "minimum"
> drive requirement.  In other words, would the KX1 at 3.8 watts work also?
>
> You sound like you might work for Elecraft?
>
> If I can buy the KXPA100 and use it with all my Elecraft rigs, it would be
> the greatest!  Sounds like that might be at least 75% true.
>
> Thanks, stan.
>
>
> On Thu, May 19, 2011 at 9:14 PM, Robert Friess wrote:
>
>  Yes, the new amplifier is the KXPA100.
>
> Bob
>
> On Thu, May 19, 2011 at 6:10 PM, stan levandowski < *sjl219 at optonline.net*>
> wrote:
>  Bob, is "KXPA100" the product name of the "new 100 watt amp"?  Or, did you
> mean to clarify the KPA100 option to the K2 and inserted the "X" by
> mistake?
>
> Stan WB2LQF
>
>
> On Thu, May 19, 2011 at 8:32 PM, Robert Friess wrote:
>
>   The new KXPA100 will work with any radio that provides 5 watts of RF and
> a Key out line.  It does not require AuxBuss.
>
> Bob, N6CM
>
>
>