[Elecraft] Two-Band Filter Board Question (K1)

[Mike Morrow]

Jim wrote:

> ... I intend to convert my K-1's (#391) original 2-band filter board
> to 80 & 40 meters from 40 & 20.

Unless the 40m crystal in your four-band board and the 40m crystal in your two-band board oscillate at nearly the same frequency (within 100 Hz), there'll be a little frequency display inaccuracy for 40m on one of the filter boards.  The K1 MPU can store only one display calibration factor for any particular band. 

> Is it necessary to locate the 80 m parts at the band 1 locations

No.

> may I just remove the 20 m parts and replace with the 80 m values?

That'll work.  You'll just have to assign band 2 (b2) to 80m after installing the two-band board.  Since b1 will already be assigned to 40m from your last four-band board installation (albeit with a display inaccuracy), you'll save having to mess with b1 reassignment.

73,
Mike / KK5F