[Elecraft] Upgrades best done at the factory.

[Don Wilhelm]

Gary,

I don't think the extended low frequency range coverage is done 
routinely at the factory, but it will be done if you ask for it.
Three things are necessary in a K3 to get receive down to 100 kHz.
1) the new synthesizers
2) the KBPF3 option
3) an added capacitor on the output of a voltage regulator.

If you already have the KBPF3 option, there are some changes to be made 
to that option board.
If you have a subRX with the KBPF3 option in it, the capacitor addition 
and the changes to the option board must be done too.
If you are buying a new KBPF3 option, those changes are already present 
on new boards (purchased after May 2015).

73,
Don W3FPR

On 2/8/2016 3:02 AM, Gary Smith wrote:
> I've already placed the order for a K3s/10 and will be ordering the
> Amp and ATU which I can migrate to the K3s. I understand they now
> make a mod on one of the components to allow a transverter to listen
> to the new band. Does this mod also have to be present in the sub Rx?
>
> I would want this option completed in the in the older rig as well,
> as I want to sell it with the mod but also want it in my K3s upgrade
> with Sub Rx. If a mod to a legacy piece (Sub Rx) needs it done at the
> factory. then I need to send my Sub unit out so they can work on it
> in a timely manner.
>
>