[Elecraft] K3 Crystal Filter Installation

[Ron D'Eau Claire]

To expand on Julian's comments, enter a value of 13 kHz for the FM filter
(which *must* be in FL1 position because it's the widest filter). Then work
down in bandwidth as he said so the narrowest bandwidth filter closest to
FL5. You can leave gaps if you plan to add another filter later.

And, as Julian noted, be sure to note the offset on any  of the 5-pole
filters. Be aware that the dash ( - ) before the number is a minus sign!
That's important. 

You can then enable each filter using the MENU controls, but many find it
much easier to set up your filters using the K3 Utility program. Do that as
follows:

1) Connect your computer to your K3, start the Utility program.

2) Choose CONFIGURATION / EDIT CRYSTAL FILTERS. 

3) On the screen that appears will be radio buttons that allow you to select
the crystal filter located in each position, enter the offset if it's  a
5-pole filter, and choose which filters to enable for which modes. 

Note that for transmit, the FM filter must be enabled for FM transmit, the 6
kHz "AM" filter must be enabled for AM transmit, and the 2.7 (or 2.8) kHz
filter must be enabled for CW and SSB transmit.

Ron AC7AC



-----Original Message-----

Gary Gregory-3 wrote:
> 
> Hello,
> 
> It would appear as though I have bit off more than I can chew as the 
> saying goes.
> Today two optional filters arrived and have to be installed.
> Currently there are 3 filters used (2.8, 2.1 and 400Hz) and they are in
> positions FL-1, FL-2 and FL-3
> I have to add the FM and 6.0Khz filters.
> I assume (hate that word) that reading the manual I will place the widest
> filter in FL-1..? (6.0Khz, followed by the FM, 2.8, 2.1 and 400..??)
> I have also become confused with the values to enter in the Config menu.
> If anyone can e-mail me direct with some more specific details I would
> greatly appreciate it.
> regards,
> Gary
> K3/100 #679
> 
Actually the FM is the widest filter, and should go in FL-1, followed by the
6.0, etc.

If any of the filters are 5-pole filters (bare PCBs with crystals on them) 
they have a number on them which needs to be entered in the config menu. If
you are moving a 5 pole filter you will have to zero out the number you
entered at its old position, and re-enter it at the new one.

You will then have to go through all the filter entries in the menu to
ensure that the K3 knows which filter is installed at each position, and
then you will have to specify which filter is enabled for each mode. It's
all described at the back of the User Manual.

-----
Julian, G4ILO  K3 s/n: 222 K2 s/n: 392
G4ILO's Shack: www.g4ilo.com
Zerobeat Ham Forums: www.zerobeat.net/smf