FAQ
From Zerobeat
A list of frequently asked questions about the K3.
- The Elecraft Factory K3 FAQ is here.
- See Firmware Error Codes for specific firmware error messages and how to resolve them.
- See Nomenclature for a note about nomenclature.
Contents |
Why doesn't the K3 display SWR when I [TUNE] ?
It does, provided you tune at 2w or more, otherwise the VFOA display just shows - -
Are SSB tx passband adjustments in the K3 limited to TX EQ?
If so, is there a spec on what the tx audio passband is adjusted to at the factory with the stock 2.7Khz filter?
The default Tx Audio passband is 250 Hz to 3150 Hz. Its adjustment is not yet part of the user interface, but will be.
You can also offset the center frequency of the 2.7 and 2.8 kHz filters to shift the passband slightly (this also impacts RX.) Combined with the 8 band TX EQ boost/cut of +/- 16 dB you have a lot of flexibility.
TXGN Config menu shows Pr80 xx
When carrying out the power calibration on the K3, I find that TXGN in the Config[Tech] menu shows: "Pr80 28" when doing the 50W calibration on 80 metres.
It is only on 80m & the 50W calibration that I get the "Pr80". On all other bands the Pr80 is not shown and I just get a gain figure.
"PR80" means "preamp in use for 80 m transmit" (at the 50-W level). Thanks for noticing that this was left out of the manual.
The transmitter and receiver share the I.F. strip, which is reversible. In TX mode the preamp is used on some bands and power levels but not others, allowing us to optimize per-band gain distribution. On 80 meters at the 50-watt calibration point, the preamp is turned on by default. It can be turned off within the TXGN HP menu entry if required by tapping the PRE switch. The only difference you'd notice is that the resulting TXGN number, after calibration, would change.
Normally we would only turn this off during signal tracing or as a preamp gain check in TX mode. You can leave it on. -- Wayne
K3 RS232 Pin Assignment Error?
Thanks for catching this John. We had another report of this today and the manual will be corrected in the next revision.
Pin 6 should be listed as not used. Pin 7 should be the RTS pin. Greg AB7R
