[Elecraft] RE: K2 Options - Order of Building?

[Phil Wheeler]

COLIN WHITMORE wrote:

>Henry,
>
>My order of preference is based on the percentage 
>of usage. That is, what option does the most for 
>you, and when.
>
>1. TC-PLL Upgrade - This will improve the K2's 
>basic design. % Usage: 100
>

------

>In the mail today came the TC-PLL Upgrade, 
>K160RX, KNB2, and KSB2.  
>

I think you will want to install the BFO upgrade at the same time as the 
TC-PLL upgrade (I take the latter to be the one with the thermistor in 
it).  That is:

BFOMDKT
 K2 BFO Toroid & PLL Ref Osc Xtal Upgrade  (but use the xtal from the 
following)
 
then

E850138
 K2 Temperature Compensated PLL Reference Upgrade

per the website:

> If your K2 serial number is below 3000, we also strongly recommend 
> installation of the BFO modification kit (BFOMDKT) before the PLL 
> upgrade is installed. (K2s s/n 3000 and up already include the changes 
> to the BFO circuit.) Also, K2 firmware older than 2.00 should be 
> upgraded  (FWK2MCIO) to take maximum advantage of the PLL upgrade. 
> Tuning linearity is much improved with the new F/W.


Of course, I am *assuming* that the adopted K2 is below 3000.  If not, 
no need to do the BFO mod.

73, Phil