[Elecraft] Need advice - upgrade vs. K2

[Sverre Holm]

> -----Original Message-----
> KNB2 Rev C dtd 3 Feb 2000
> KAT2, Rev B, dtd Feb 14, 2000
> KSB2, Rev B, dtd Nov 15, 199
> but are there any upgrades to the un built modules? 

KSB2:
I am aware of the ALC upgrade mod for the KSB2 dated Sept 2001, see
http://www.qslnet.de/member/la3za/K2/mod.html and go to "3. Modifications
that took place for various serial numbers prior to 3000."

Then  there is also the change of default filter bandwidth from 1.9 kHz to
2.2 (go to "1. General modifications applicable to any K2", press KSB2 and
go to item 2: Crystal filter bandwidth modification). This requires a new
set of filter capacitors which I believe are available from Elecraft. 

There is a large number of user modifications to the KSB2 that have been
proposed and which are documented on this page. It may be a bit confusing,
but the two above should be the only ones that are in the newest version of
the KSB2 as far as I know. 

In my view, the KSB2 is probably the option board for the K2 which could
need an official update as some of these modifications are really worthwhile
doing.

KNB2:
The KNB2 was changed also at one point in time, but I believe that was
almost immediately after its release and most likely prior to your KNB2. You
should be able to tell when you look at your kit. If the manual tells you to
put R's where there are C's marked on the PCB or vice versa, then you have
the updated version which still uses the original PCB.

KAT2: No changes


73

Sverre
LA3ZA
http://www.qslnet.de/la3za/