[Elecraft] K3S vs K3 - upgradability

[Phil Wheeler]

Here's what Wayne said in his first post here 
(4/29) on this topic:

"Here's a summary of the changes required:

   RF board:              Add one leaded capacitor
   KRX3 (if applicable):  Add one leaded capacitor
   KBPF3:                 Remove two inductors; parallel three new capacitors

If you're interested in this low frequency range, and you'd like to try the mods, please email me directly.

Note: To tune this range with the K3, you'll need the new synth (KSYN3A), a KBPF3 module (on the main and/or sub receiver), and a KXV3 module. A KXV3 is required because the antenna for the 100-500 kHz range should be connected to RX ANT IN or XVTR IN. The ANT1/ANT2 path goes through the T/R switch, which has a high-pass filter to protect the K3's fast PIN-diode T/R circuitry"

And later he said (5/13):

"The modification only affects 500 kHz and lower. We'll have a modification kit ready in a week or two.

A few K3s have been modified so far, and all performed very well."

But that was yesterday, so it will be a while.

Phil W7OX


On 5/14/15 12:41 PM, Ross Primrose wrote:
> On 5/14/2015 3:27 PM, Edward R Cole wrote:
>>
>> 8. Extended RX with modified KBPF3A - I 
>> understood a kit was available for to DIY - I 
>> will get a kit
>
> I got the impression that new KBPF3As will have 
> the necessary parts of the mod, but as I recall 
> when the mods were described a few weeks back 
> that there were changes that would also need to 
> be made to the RF board & KRX3.  Hopefully in 
> the next few days there will be some 
> clarification on exactly what a K3 (no S) owner 
> with no KBPF3s and the old synth(s) needs to 
> actually buy/mod to get on the bands below 
> 500kHz...
>
> 73, Ross N4RP
>