[Elecraft] KFL1-4 - Low Power on 15M

[Leo Starrenburg PA5LS]

Hi Mike,

I had the same problem / phenomena, here's my evaluation (Nov. 2001) on
the matter :

******

LS

thanks to all who responded to my question on the output on 15 m.

I rearranged the coils on L2 of the 15/20m low-pass filter wich brought
the power up from 2.6 to 3.0 Watt. I also checked 20m wich was fine.

The troubleshooting section of the manual states that "as a last resort"
R11 on the RF board can be changed from 82R to 68R, so i piggybacked a
470R on it. This resulted in an output of 4.0 Watt. All the bands were
checked again and the result was 5 Watt on 40, 30 and 20m, and 4 Watt on
15m. This seems to be a run-of-the-mill range, if not absolute than
surely in rate.

I will use the K1 mostly on batteries with abt 2 Watts, so please tell
me if the R11 change will do more harm than good .......

Now for the part that really puzzles me: after installing the KAT1 and
calibrating this again as per manual, the power on 15 has gone down
again to 3 Watt ! The other bands are fine, the powermeasurement of the
KAT1 is ok, so what happend ?

73' Leo.

*****

Try aligning the filters with 1 W, it's easier. Follow the sequence,
otherwise you will mis-align the higher bands again.

Hope this helps somewhat !

73' Leo.