This is an interesting thread but I wonder about the practicalities... Of
course we all want to emit a clean signal.

In which cases might the IMD be a problem? Running full power off a battery
with voltage dropping?
Running almost full power to drive an older type tube amp?

How fast does IMD deteriorate with increased power from the K3S or K3?

What are the IMD figures when running 20-25W driving a linear amp. such as
the KPA500?

73, Yngvi TF3Y

On Tue, Oct 18, 2016 at 7:58 AM, David Gilbert <>

> 1.  W4ATK seems overly indignant about a "compliance" spec he doesn't even
> understand.
> 2.  And while I've been a bit chagrined about it myself in the past,
> anybody who doesn't understand that Elecraft's chosen business model is
> centered around portable gear (which includes motor home and cabin
> operations as opposed to just backpacking) hasn't been paying attention for
> the last 20 years.
> Dave   AB7E
> On 10/17/2016 4:47 PM, Kevin wrote:
>> Hmm, compliance with what? The rig meets Elecraft specs and since the FCC
>> doesn't regulate TX IMD there is nothing to comply with.
>> The problem I have is accepting the status quo by Elecraft. Just because
>> everybody else is around -30dB shouldn't mean Elecraft stop trying to do
>> better. Let the portable/backpacking rigs use 12V MOSFETS and switch the
>> desktop model K3(s) to higher voltage finals. Yeah, yeah, I know, the K3(s)
>> is supposed to be portable capable. How many people take their K3(s) out in
>> the Field Day?
>> Just because it has a carry strap doesn't mean it's a portable rig. My
>> TS-520 has a beautiful leather strap. It weighs 37 pounds. Anybody know
>> where I can rent a mule?
>> On 10/17/2016 3:41 PM, Jim Rogers wrote:
>>> I have been a loyal Elecrafter for many years, and this seems to be
>>> somewhat similar to the VW diesel problem.
>>> Elecraft has sold me a radio specifying it to be in compliance with
>>> specifications of IMD. Now you are telling me that I must bear the burden
>>> of time and expense to bring the device you specified and guaranteed to be
>>> in compliance, into compliance.
>>> I built mine from a kit, so Elecraft you send me the necessary boards,
>>> modules, whatever to bring my K3s into compliance and I will return to you
>>> the defective boards,, modules, whatever. Then you can rework the defective
>>> boards for the next exchange. I will spend the time and effort of
>>> disassembly and re-assembly.
>>> Jim, W4ATK
>>> K-line, K2
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