[Elecraft] Big firmware upgrade?

[Bill W4ZV]

Randy Moore wrote:
> 
> Today I'm helping a friend update his K3 firmware. He doesn't have  
> high speed internet access and it's been over a year since he has  
> upgraded. Are there any calibrations that need to be done after such a  
> significant upgrade?  He also hasn't done any of the hardware upgrades.
> 

The following are fairly simple hardware mods (all easy to access on the RF
board) which should bring a 1 year old unit up-to-date with current units
(excluding the DSP audio upgrade):

http://www.elecraft.com/K3/mods/IF_Output_Buffer_Gain_Mod_Rev_A.pdf
http://www.elecraft.com/K3/mods/K3_vfo_noise_mod_Rev_C.pdf
http://www.elecraft.com/K3/mods/K3%20rx%20protection%20mod,%20rev%20B.pdf

All of these are on the RF Board and fairly easy to do.  The first is needed
only if he's using IF OUT for a panadapter.  Of course it's not absolutely
necessary to do any of these to be compatible with firmware changes (unless
he tries to set CONFIG:VCO MD SPI=2 in the second mod above).

You should also do the RF Gain Calibration in the K3 Utility and then
recalibrate the S-Meter.  I would recommend these even if you don't do the
hardware mods above.

73,  Bill
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