Greert Jan de Groot,
If you have an earlier K2, I suggest that you do the other upgrades.
If your K2 is below SN 3000, then the K2ATOB mods are applicable -
download the K2ATOB instructions for a list of all the mods are required.
If your SN is below 2560, I recommend replacing the IF crystals for a
better IF filter response.
Those steps will bring it up to date except for the K2 Keying Waveshape
mod which is currently not available from Elecraft as a kit. I can give
you instructions on how to install it on your K2 if necessary. K2s
above SN 4660 have that mod already installed.
73,
Don W3FPR
On 5/9/2021 5:36 PM, Geert Jan de Groot wrote:
On 09/05/2021 20:54, elecraft-requ...@mailman.qth.net wrote:
Don, W3FPR used to do much of this work on K2 transceivers, but he has
retired from that role. Dave, W8FGU has assumed Don's role. Alan, W3DVX
also provides such services. Both have posted periodically to this
forum.
There may be others who are experienced K2 upgraders, but these are the
folks that come to mind.
I built my KPA100 15 years ago or so and only recently I investigated
updates. The KPA module has seen a number of design updates over the
years and it makes sense to investigate. I've updated mine (thanks
QRP-shop for getting the mod kits in Europe, through Corona times!)
and at the end of a long evening I have a bag of swapped-out parts and
a PA that worked quite a bit better, feels like a new unit.
I have not used one of the upgraders (being in Europe, postage and
customs would probably have me mortgage the house, frankly) but I do
recommend updating. It is too bad you don't have the setup to do it
yourself because on K2, these mods really are simple and can be done
on the kitchen table.
Geert Jan
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