Difference between K2 rev. A & B

[DL2NEP]

Hi,

can someone explain me the difference between A&B? Is it nessesary to upgrade a A to B?
I bought a used K2 with #14xx. So I expect rev. A.

vy 73 de Bjoern

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[Don Wilhelm-4]

Bjoern,

The best description is in the K2 A to B instruction manual, so I would
suggest you download that and do a physical examination of your K2 to
see whether the upgrades have been done or not.
The A to B instructions also list several other associated upgrade mods,
so you might want to download those mod instructions as well.

Many early K2s have been upgraded, while others have a few select
upgrade mods installed, so without the complete documentation to check
the status of your K2, it is difficult to tell.

The boards were modified to include the upgrade mods at SN 3000, but the
earlier boards can be fully upgraded.

73,
Don W3FPR

On 8/1/2013 11:28 AM, DL2NEP wrote:
> Hi,
>
> can someone explain me the difference between A&B? Is it nessesary to upgrade a A to B?
> I bought a used K2 with #14xx. So I expect rev. A.
>

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[Sverre Holm (LA3ZA)]

Hi Björn,

You can also take a look at my "Unofficial Guide to Elecraft K2 Modifications" at the address http://la3za.blogspot.no/p/la3za-unofficial-guide-to-elecraft-k2.html.

It has a section describing the serial number 3000+ modifications in an alternative view compared to the Elecraft document. It also adds some minor modifications taken from a comparison between the schematics, and offers some of the background for the 3000+ modifications as well.

I have just moved the "Unofficial Guide to Elecraft K2 Modifications" to a new address and done some slight updating, especially with respect to some of the old missing links. More updating will take place in the days and weeks to come. BTW, old links will automatically be forwarded to the new address.