[Elecraft] 2nd ksb2 works different

[W3FPR - Don Wilhelm]

Bert,

I have been pondering your reflector note -- and as far as I know, there is 
nothing on the KSB2 that is band dependent, it operates at the IF frequency 
only.

Are you certain your K2 gives full power output with the old KSB2 installed? 
Re-check to be certain.

The only potential differences could be in the firmware and possibly the ALC 
circuits on the KSB2.  Compare the ALC components between the two boards 
carefully - perhaps you will find the answer to the mystery - and swap 
firmware on the 2 boards to see if the problem follows the firmware.  It may 
have been on E-bay because there was some problem with it - my scepticism is 
showing.

73,
Don W3FPR


----- Original Message ----- 

>
> I'm running a K2 ser. 1020 with an "old" ksb2 rev.2. this combination runs
> very well so far.
>
> At Christmas I got a second ksb2 from eBay, unbuild and a new rev. D. I
> bought this, because I wanted to do the bandwith mods anyway. The Kit is
> containing the new crystals and I got perfect 2% capacitors. Anyway, as I
> tried to change the old against new I realized a good modulation and a
> nearly perfect ssb sound on 80m. But - only on 80m (160 not installed) I 
> got
> 10 watts out of the box - the power is a step lower on every higher band. 
> On
> 10m I got only 1,5 watt out. Did I try a wrong combination?
>