[Elecraft] K2 #4334 alive and well!

[Guido Tedeschi]

I'm glad to announce that K2 number 4334 (unbuilt number 2591 upgraded) is
finished and it is working very fine.
It is completed with KIO2, K160RX, KAF2, KAT2, KNB2, KBT2, KSB2 and MH2 and
it took about 53 hours to be completely builded, coarse aligned and fine
aligned (I'm not fast, I know...): about 35 hours for the basic rig and 18
hours for the accessories and fine alignement.
The only issue found was that I had to add 68pF and 100pF in parallel with
C174 and C173 to have the correct BFO range (4916.77 KHz - 4912.59 KHz) but
I think that it is still not enough to calibrate the narrow filters for RTTY
using high tones, more about this on a next message....
Very minor-minor issue: I found that KIO2 needs a true RS232C signal with
negative space, it did not work with a 0-8V signal and I had to slight
modify  my optocoupled CAT interface (I will publish the schematic diagram
soon...).
Sadly, the rig is not mine but it will go to his home, at iz2ftr, and it
will make a pair with his K1 #1161
I think that, probably, this winter I will build one also for me and it will
stay near his small brother, my K1 #1096, now ready for its third summer
holidays... :-)
In my city, Brescia, we have now five K1's and two K2's: the family is
growing up!
If you want to see some photos (iz2ftr's rigs are still to be added):
http://www.hamlan.org/elecraftbs/photos.htm
Ciao and 73
Guido, ik2bcp