[Elecraft] XV144 calibration

[Don Wilhelm]

Michael,

That is normal - the K2 spec for 10 meter coverage is 28.0 to 28.8 MHz at 10
watts output and it falls off more rapidly at the high frequency end than
the low end.
You may be able to increase the usable coverage at the expense of the
maximum available output by peaking the 10 meter bandpass filter at some
frequency higher than the 28.2 point that is indicated in the manual.  I
would suggest peaking at 28.8 or even higher if you need to achieve good
power output over the entire 28.0 to 30.0 MHz.  If you do that, check the
maximum power output at both ends of your chosen band and try to balance the
maximum available power at both ends - adjust the peaking frequency up or
down to achieve good coverage over your desired range.

73,
Don W3FPR

> -----Original Message-----
>
> The SSB Firmware was ok, version 1.8 so no problem there.
>
> Now i have found the issue on the K2, but not the solution. The desribed
> issue seen on the low power out are comming from the 28-30 Mhz.
> if i check
> indicated power by the internal powermeter it drops over the
> freq. with the
> power set for 5W i do reach 5.4 W on 28 Mhz at 29 Mhz it is 4,9, still ok
> but at 30 Mhz it is down at 0,3 W
> So trying 10 W 29 Mhz only goes to same 4.9, so a rolloff on increasing
> freq. are seen. Proberly normal, but passband seems to be to narrow ???
>
>
> Any idea is this normal ??
> Thanks in advance
>
> Br.
>
> OZ1BZJ
> Michael
>