[Elecraft] K2 CW Tone

[Geoffrey Mackenzie-Kennedy]

Good Evening Aki,

Is the frequency of the *hum* modulation  the same as the frequency of your
sidetone, or one of its harmonics or sub-harmonics?

73, Geoff
GM4ESD

----- Original Message -----
From: "a.yoshida" <a.yoshida at post.email.ne.jp>
To: <Elecraft at mailman.qth.net>
Sent: Friday, May 06, 2005 11:21 PM
Subject: [Elecraft] K2 CW Tone


> K2 #4504
> A few days ago I received RST 597 report on 20m CW.
> Then checked transmitted CW monitoring with other radio.
> Following is subjective report.
>
> 80m >>> 599
> 40m >>> 599
> 30m >>> 599
> 20m >>> 597 Carrier seems to be modurated by hum.
> 17m >>> 598 Same as above
> 15m >>> 599
> 12m >>> 599
> 10m >>> 599
>
> K2 is far enough from magnetic source.
> Changing power (2W, 5W, 10W) does not make any difference.
> I do not know why tone is poor only on those 2 bands.
> Any suggestion please.
>
> 73 de aki, ja1nlx