Posted by
K6LMP on
Feb 08, 2010; 9:19pm
URL: http://elecraft.85.s1.nabble.com/K3-in-a-cw-pileup-needs-work-tp4523884p4537521.html
Ummm, if this is a real issue for some operators (and not a theoretical issue), it would seem the problem could easily be resolved with an audio transformer.
RadioShack sells one for $2.99. They don't publish the specs in enough detail to tell for sure, but it has a number of taps on the secondary, and would appear to be able to transform the impedance of most headphones into the K3's "sweet spot."
Am I missing something here? a small project box with the transformer enclosed and phone jacks in and out ought to do the trick.
Lew K6LMP
On Feb 8, 2010, at 12:45 PM, Lyle Johnson wrote:
> I didn't mean to stir up yet another controversy. I use Heil Proset
> with my K3 and they work just fine, as do my Yamaha CM500.
> The K3 can easily drive high-impedance headphones.
>
> My point was simply that *if* you have to crank up AF gain to the point
> of distortion to get sufficient headphone volume, and *if* you are using
> high-impedance headphones, *then* the problem *may* be related to the
> headphone impedance.
>
> 73,
>
> Lyle KK7P
>
>
>
>
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