[TenTec] Argonaut VI service manual ?

Bob McGraw K4TAX rmcgraw at blomand.net
Sat Oct 6 21:30:14 EDT 2018


The frequency determining values and math are written in firmware.   
There are no adjustments.

The only adjustment related to frequency is for the master oscillator 
being U8 {GTXO_566}.    I suggest you perform a Master Reset and then 
remeasure your radio.   CW mode and AM mode should be the same 
frequency.  As to SSB mode, LSB and USB, I presume you have means to 
actually measure the suppressed carrier frequency and not just "tuning" 
the radio to what sounds correct.


Bob,  K4TAX

On 10/6/2018 7:56 PM, Carlos wrote:
> Hi,
> I noticed that the AM carrier (in 10 meters at least) is almost 600 Hz
> lower than the supressed carrier in USB. So in USB the radio is almost
> spot on, but in AM the carrier appears shifted to the left.
> I checked with some testing gear (less than one year old, still
> calibrated) and one SDR receiver. I'm not dreaming it.
> I have the user manual and the schematics, but I cannot find any
> procedure to adjust the position of the AM carrier.
> Any help is greatly appreciated.
> 73,
> Carlos VK1EA
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