[Elecraft] Dramatic improvement in K3 RX sensitivity below 500 kHz -- looking for testers

[Wayne Burdick]

On Apr 29, 2015, at 8:30 PM, drewko <drewko1 at verizon.net> wrote:

> IIRC, original statement for the new board was -120 dBm at 475 KHz.

That was conservative.


> Now saying -133 with the mods.

At least on my lab K3.


> Maybe broadcast band DXers would find it useful on the lower half of the AM band?


Could be. On my K3, with the mods, the MDS at 1.0 MHz is now -136 dBm, preamp on (400 Hz BW).

Just keep in mind that in the lower frequency ranges, you'll want to use RX ANT IN or XVTR IN to avoid the loss of the high-pass filter in the T/R switch.

Wayne
N6KR