[Elecraft] ten tec vs KPA100? [actually, it's "KXPA100"]

[Wayne Burdick]

Mark n2qt wrote:

> Is it expected that the KPA100 will use RF sensing for band changes  
> or use the AUXBUS to specify the band of operation?

Hi Mark,

The Elecraft KXPA100 will have RF sensing, as well as band-control  
inputs that work with various radios.

The amp will also provide very tight integration when used with a KX3.  
It will track the rig's band changes, and the rig will show the amp's  
actual power output on its own bargraph and TUNE display.

(If you go into the LCD TST menu entry on the KX3 and rotate VFO A to  
see all of the LCD segments, you'll notice that the "5" and "10" watt  
markers on the RF power bar graph can change to "50" and "100" watts.  
This will be handled automatically as you rotate the KX3's power  
control, switching from QRP to QRO power levels.)

The entire control interface between the KX3 and the amp (band change  
and remote control, keying, and ALC) will be handled via a single  
cable connected to the KX3's ACC1 jack. If a computer is also being  
used, it can be connected to the amp's second control port, and the  
amp will then relay commands between the computer and the KX3,  
allowing use of remote-control and logging applications without any  
software configuration changes.

Other KXPA100 details:

The amp will also have a companion 100-W ATU that bolts beneath it,  
forming a single-box solution. This ATU (KXAT100) will have the same  
matching range as the KXAT3, the KX3's internal ATU. When the KX3  
detects that a 100-W ATU is present, it will automatically put the  
internal ATU in bypass, if applicable. The 100-W ATU will include two  
antenna jacks, with antenna selection via the ANT switch on the KX3  
itself.

Unlike all other stand-alone 100-W amps, the KXPA100's low-pass  
filters are single-band, allowing optimization for minimum transmit  
IMD on each band. Other amps use about half as many filters, most  
covering two bands, resulting in compromise IMD performance.

Like our 500-W KPA500 amp, the KXPA100 will have temperature- 
compensated bias circuitry, and full monitoring of SWR, power, current  
drain, temperature, and other parameters. This ensures safe and  
reliable operation. An input attenuator is also provided so the  
KXPA100 can work with nominal 5- or 10-watt drive levels.

73,
Wayne
N6KR



On Aug 22, 2012, at 8:13 AM, Mark n2qt wrote:

>
> Is it expected that the KPA100 will use RF sensing for band changes  
> or use the
> AUXBUS to specify the band of operation?
>
> Would love to see more details (even target price) on this one!
>
> Mark n2qt
>
>
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