[Elecraft] K3 #222 alive and well

[Ron D'Eau Claire]

I can help with two of those Julian: 

The method 3 Ref Cal is not yet implemented in firmware. For now you have a
TCXO that is 5 times more stable in frequency as the rig temperature changes
(1 ppm compared to 5 ppm for the "stock" oscillator). 

Wayne's firmware - when it's released - will use the temperature chart data
that shows the remaining drift vs. temperature to further reduce the drift
to perhaps as little as 0.5 ppm by having the firmware automatically adjust
the reference oscillator frequency based on the internal temperature
reported by the front panel temperature sensor. 

I, too, spin the POWER control a lot since I use and external tuner. Wayne
has said that an automatic power reduction when going into TUNE to adjust an
external tuner is on his "to do" list. 

Ron AC7AC
 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of G4ILO
Sent: Tuesday, January 15, 2008 1:42 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3 #222 alive and well



I'm happy to report that K3 #222 is alive and well, and none the worse for
the surgery on the internal screen as a result of the missing threaded
insert. So I didn't get to wind any toroids but I did get to do some chassis
metalwork. :)

A couple of questions for others who have "been there". I have the 1ppm TCXO
option. I tried to calibrate it using Method 3 (entering the data on the
calibration sheet) but When I get to RF CAL and tap [1] which is supposed to
change to REF xxC, it doesn't. I understand you need to have configured the
FP TEMP sensor but I have set that option. What am I doing wrong?

I like to use the Coarse tuning option when surfing the short wave bands. It
seems to go in 5KHz steps from whatever frequency I am on. Is there a way to
quickly zeroise out the last digits so that I am always on an exact multiple
of 5KHz when using 5KHz steps?

The PWR control has a very fine resolution. It is a lot of turns to reduce
power to 1W for tuning with the external tuner and then turn the power back
up again for operation. Is there an easier way to do this?

I'd still like to see ATU Auto or Bypass settings stored seperately for ANT1
and ANT2.

I can't connect the K3 to the computer for a firmware update because the
cable I bought from Maplin has male plugs on each end, and my PC serial port
is also male. So I'll have to make my own cable like I was originally going
to. Why would Maplin sell a serial cable that doesn't mate with a PC?

I do want to say thanks to Wayne and Eric for making the K3 possible. It has
certainly been a long wait, and I was disappointed to have two faulty parts
in my kit, but having now experienced the K3 for myself I have only one word
for it - awesome!

-----
Julian, G4ILO K2 s/n: 392  K3 s/n: 222
G4ILO's Shack: www.g4ilo.com
Zerobeat Ham Forums: www.zerobeat.net/smf
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