[600MRG] K3 Owners

[Edward R Cole]

Eric,

I'm kind of puzzled by what you write.  On my K3 (SN 4340) the KXV3 
mode under CONFIG menu shows three choices:
1)  Not installed
2)  NOR
3)  TEST


Its my understanding that TEST bypasses the output filters so one can 
transmit any frequency from 490-KHz to 30-MHz at   a power of 
0.1-1.5mw.  To operate on 600m using the TEST mode one has to have 
the GEN Coverage filter installed.

The new field-test sw just released addresses transverter operation 
on 10-MHz and extends use up to 10.5 MHz.  I think all transverter 
interfacing bypasses the HF LP filters and runs the transmitter at mw 
level.  But this may only apply at VHF transverter use?

Running a 630m transverter using a 10-MHz LO as one would have to 
filter the output to eliminate images and LO feedthru.  That should 
be easy at 472-500 KHz.

N6KR addresses bandpass re-tuning for operation at 10.5 MHz (if needed).

73, Ed - KL7UW

At 06:56 PM 1/25/2014, Eric NO3M wrote:
>I am wondering if any of filtering is being bypassed in "transverter 
>mode"?  I have been using the K3 as the 10 MHz IF rig for quite a 
>while, but with the KXV3 parameter just set to "nor" and rig tuned 
>to 30M.  In that mode, the band filtering is bypassed; however, in 
>"transverter band" mode, the filtering was NOT bypassed.  I don't 
>know if that ever changed, but I first noticed this when playing 
>around with 7 MHz LO/IF a while back, and finding a nearly 18-20 dB+ 
>loss between modes.
>
>Waiting to get a copy of the beta-test firmware to see if there is 
>any noticeable differences in performance, etc., with how it's been running.
>
>TU Jay, W1VD, for the 160M QSO!  Terrible static on the southeast 
>and south beverage arrays tonight that is sporadic.  Back to the contest.....
>
>73 Eric NO3M / WG2XJM
>
>On 01/25/2014 10:24 PM, Michael Mussler wrote:
>>Ken,
>>I installed the external reference board in my K3 this week and I 
>>had similar a similar exchange with Wayne concerning the 
>>possibility of the 10 MHz IF. Our inquiries paid off; I got the 
>>firmware update from him earlier today. This afternoon I replaced 
>>the LO in my transverter with the 10 MHz reference that I also use 
>>into the K3. I have the new transverter setup running on WSPR 
>>tonight and presto, no frequency drift. I'll leave it running 
>>through the night and decreasing temperatures in the shack to be 
>>certain, but it looks like the modification was a complete success!
>>
>>Wayne was concerned about loss of gain at the upper end of the 10 
>>MHz IF segment but I am not seeing any difference in signal levels 
>>compared to the setup with the 7 MHz LO and IF. It doesn't look 
>>like I'll need to tweak the tuning adjustments in the K3 that he 
>>suggested might be needed.
>>
>>73
>>Mike
>>AI8Z
>>WD2XSH/12
>>
>>
>
>
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73, Ed - KL7UW
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