[Elecraft] Older K2

[Don Wilhelm]

Neil,

Download and review the K2 A to B instructions, and you will see some 
explanation for many of the official upgrades.
I would suggest you add the 2nd Xtal Flattening Mod since you have the 
KSB2 installed - it will flatten the OP1 filter passband.
If you are content with the thermal stability of your K2, that is fine, 
but if you wish to improve it, I would suggest adding the BFO mod and th 
thermistor mod.  If you run an amplifier, I would strongly recommend the 
K2 Keying Waveshape Mod which eliminates keyclicks (but also requires 
new firmware).

I doubt that you will have any real problems with your older K2, but the 
A to B mods do add some improvement to the K2 stability.

BTW - the rework eliminators are no longer available (unless you can 
find an uninstalled kit), but the IMA is still being shipped as far as I 
know.

73,
Don W3FPR

Neil Shubert wrote:
> Hi All.
> I have a K2- ser# 2676
>
> I will look to upgrade to the re-work eliminator, unpcbs internal mic
> adaptor and other kits as well
>
> I know there were design changes made to the radio after my manufacturing
> run. What improvements came out of these changes and Does anyone know if I
> will have any problems or what problems I need to expect from a pre-
> upgraded radio.
>
> Neil Shubert
> AC2O
> K2-2676
> KSB2 KDSP2 KNB2 KAT2 K160RX
>
>