[Elecraft] K3 SSB transmit performance: an open letter to 'solardx'

[wayne burdick]

Dear 'solardx',

The review you posted on eHam suggests that your K3 is not performing 
properly in transmit mode. (Thanks for your comments on its receiver 
performance.)

A measured -24 dBc 3rd-order transmit IMD product on 20 meters is far 
worse than we've found in our QA tests. We're planning to post our IMD 
plots, measured at 100 W, for comparison. We'll send the link to the 
reflector when these are ready.

We depend on direct feedback from customers when anything appears to be 
working incorrectly -- especially with a new product. But since you 
posted anonymously, we have no way to contact you. If you'll e-mail us 
privately (wayne at elecraft.com and eric at elecraft.com), we can start the 
process of either replacing a problematic module, or looking deeper 
into your concerns. You appear to have technical expertise and 
equipment well beyond the average customer. We'd prefer to enlist you 
in making changes and improvements rather than be left hanging with an 
unsatisfied mystery customer.

None of the issues you mentioned with transmit voice quality are 
representative of what we've measured, and many other customers have 
raved about their SSB signal reports. But either way, this is entirely 
a function of digital signal processing. The algorithms can easily be 
modified if evidence warrants it, and we're committed to making ongoing 
improvements.

Please contact us so you can be part of our long-term solution to any 
outstanding issues.

73,
Wayne, N6KR
Eric, WA6HHQ

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