[Elecraft] K3 Strange Power Output Problem

[Wayne Burdick]

I have to admit, operating SPLIT between a ham band and a MARS band that falls outside the nearest ham-band filter isn’t something that occurred to me when writing the firmware. But I can change the filter selection algorithm to accommodate this case as long as a KBPF3 module is installed. 

Technical details:

Since the K3/K3S is a downconversion superhet, we use very narrow ham-band filters. One of the narrowest is the 30 meter filter. 

To preserve the rig’s exceptional dynamic range, we switch the band pass filters with relays, not diodes. This means we can’t switch filters at T/R rates. 

So to handle the case being discussed, we’d have to select the 7-10 MHz KBPF3 filter for both RX and TX. 

73,
Wayne
N6KR


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http://www.elecraft.com

> On May 13, 2018, at 6:10 AM, Wes Stewart <wes_n7ws at triconet.org> wrote:
> 
> Another reading comprehension problem.
> 
>> On 5/12/2018 1:36 PM, Mark E. Musick wrote:
>> Hi Ed,
>> You don't have a transmit problem at all. It is not an anomaly.
>> The amateur band starts at 10.100 MHz. You shouldn't be transmitting below that frequency.
>> 
>> Hello,
>>       I noticed this power output anomaly today while trying to work the NSS station. My K3 was in split mode, transmitting on 10.113.5.
> 
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