[Elecraft] K3/HL-1.2Kfx

[K9ZTV]

True!

(Lyle is always right!).

But owners of older K3s who want to avail themselves of the ALC support 
(as a precautionary backup only) need to be reminded of the following 
(to which Lyle was referring):

1)  Be sure you have performed the Elecraft hardware mod entitled, "K3 
External ALC
Modification & Band Data Pull-up Resistor Modification" (Revision A4, 
February 14,
2009). If your rig was manufactured prior to December 10, 2008 
(approximately s/n 2362
and earlier) you must do this modification before activating the 
External ALC feature in the
K3, otherwise damage could occur to the K3 DSP module. More
recent K3s already incorporate this mod. If you are not sure, check with 
Elecraft to
determine if your particular K3 (KIO3 specifically) included the Band 
Data Pull-up Mod.

2) You MUST use updated firmware versions... MCU version 1.99 (or later) 
and DSP version
1.76 (or later).  As a matter of course, EVERYONE should already be 
using the most current Beta version.

3) After the above modifications have been done, set the External ALC 
menu setting to
negative 4 volts or whatever the manufacturer of your amp recommends 
(CONFIG: EXT ALC ON ... -4). You must have TECH MODE enabled in
order to access this menu entry.

73,

Kent  K9ZTV
SN 21



On 7/2/2010 12:00 PM, Lyle Johnson wrote:
>
> In addition to setting the drive power to the level needed by the amp,
> the K3* does* have ALC support.  It is covered in the manual under the
> description for the ACC conenctor as well as a section headed "External
> ALC."
>